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* [patch net-next 0/3] net/sched: Improve getting objects by indexes
@ 2017-08-16  2:12 Chris Mi
       [not found] ` <1502849538-14284-1-git-send-email-chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
  0 siblings, 1 reply; 6+ messages in thread
From: Chris Mi @ 2017-08-16  2:12 UTC (permalink / raw)
  To: netdev-u79uwXL29TY76Z2rM5mHXA
  Cc: lucho-OnYtXJJ0/fesTnJN9+BGXg,
	sergey.senozhatsky.work-Re5JQEeQqe8AvxtiuMwx3w,
	snitzer-H+wXaHxf7aLQT0dZR+AlfA, wsa-z923LK4zBo2bacvFa/9K2g,
	markb-VPRAkNaXOzVWk0Htik3J/w, tom.leiming-Re5JQEeQqe8AvxtiuMwx3w,
	stefanr-MtYdepGKPcBMYopoZt5u/LNAH6kLmebB,
	zhi.a.wang-ral2JQCrhuEAvxtiuMwx3w, nsekhar-l0cyMroinI0,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	bfields-uC3wQj2KruNg9hUCZPvPmw,
	linux-sctp-u79uwXL29TY76Z2rM5mHXA, paulus-eUNUBHrolfbYtjvyW6yDsg,
	jinpu.wang-EIkl63zCoXaH+58JC4qpiA, pshelar-LZ6Gd1LRuIk,
	sumit.semwal-QSEj5FYQhm4dnm+yROfE0A, AlexBin.Xie-5C7GfCeVMHo,
	david1.zhou-5C7GfCeVMHo,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
	maximlevitsky-Re5JQEeQqe8AvxtiuMwx3w,
	sudarsana.kalluru-h88ZbnxC6KDQT0dZR+AlfA,
	marek.vasut-Re5JQEeQqe8AvxtiuMwx3w,
	linux-atm-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	dtwlin-Re5JQEeQqe8AvxtiuMwx3w, michel.daenzer-5C7GfCeVMHo,
	dledford-H+wXaHxf7aLQT0dZR+AlfA,
	tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
	longman-H+wXaHxf7aLQT0dZR+AlfA,
	niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w,
	philipp.reisner-63ez5xqkn6DQT0dZR+AlfA,
	shli-DgEjT+Ai2ygdnm+yROfE0A, linux-0h96xk9xTtrk1uMJSBkQmQ,
	ohad-Ix1uc/W3ht7QT0dZR+AlfA, pmladek-IBi9RG/b67k,
	dick.kennedy-dY08KVG/lbpWk0Htik3J/w

Using current TC code, it is very slow to insert a lot of rules.

In order to improve the rules update rate in TC,
we introduced the following two changes:
        1) changed cls_flower to use IDR to manage the filters.
        2) changed all act_xxx modules to use IDR instead of
           a small hash table

But IDR has a limitation that it uses int. TC handle uses u32.
To make sure there is no regression, we also changed IDR to use
unsigned long. All clients of IDR are changed to use new IDR API.

Chris Mi (3):
  idr: Use unsigned long instead of int
  net/sched: Change cls_flower to use IDR
  net/sched: Change act_api and act_xxx modules to use IDR

 block/bsg.c                                     |   8 +-
 block/genhd.c                                   |  12 +-
 drivers/atm/nicstar.c                           |  11 +-
 drivers/block/drbd/drbd_main.c                  |  31 +--
 drivers/block/drbd/drbd_nl.c                    |  22 ++-
 drivers/block/drbd/drbd_proc.c                  |   3 +-
 drivers/block/drbd/drbd_receiver.c              |  15 +-
 drivers/block/drbd/drbd_state.c                 |  34 ++--
 drivers/block/drbd/drbd_worker.c                |   6 +-
 drivers/block/loop.c                            |  17 +-
 drivers/block/nbd.c                             |  20 +-
 drivers/block/zram/zram_drv.c                   |   9 +-
 drivers/char/tpm/tpm-chip.c                     |  10 +-
 drivers/char/tpm/tpm.h                          |   2 +-
 drivers/dca/dca-sysfs.c                         |   9 +-
 drivers/firewire/core-cdev.c                    |  18 +-
 drivers/firewire/core-device.c                  |  15 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c     |   8 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c         |   9 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c         |   6 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c         |   2 +-
 drivers/gpu/drm/drm_auth.c                      |   9 +-
 drivers/gpu/drm/drm_connector.c                 |  10 +-
 drivers/gpu/drm/drm_context.c                   |  20 +-
 drivers/gpu/drm/drm_dp_aux_dev.c                |  11 +-
 drivers/gpu/drm/drm_drv.c                       |   6 +-
 drivers/gpu/drm/drm_gem.c                       |  19 +-
 drivers/gpu/drm/drm_info.c                      |   2 +-
 drivers/gpu/drm/drm_mode_object.c               |  11 +-
 drivers/gpu/drm/drm_syncobj.c                   |  18 +-
 drivers/gpu/drm/exynos/exynos_drm_ipp.c         |  25 ++-
 drivers/gpu/drm/i915/gvt/display.c              |   2 +-
 drivers/gpu/drm/i915/gvt/kvmgt.c                |   2 +-
 drivers/gpu/drm/i915/gvt/vgpu.c                 |   9 +-
 drivers/gpu/drm/i915/i915_debugfs.c             |   6 +-
 drivers/gpu/drm/i915/i915_gem_context.c         |   9 +-
 drivers/gpu/drm/qxl/qxl_cmd.c                   |   8 +-
 drivers/gpu/drm/qxl/qxl_release.c               |  14 +-
 drivers/gpu/drm/sis/sis_mm.c                    |   8 +-
 drivers/gpu/drm/tegra/drm.c                     |  10 +-
 drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c    |   3 +-
 drivers/gpu/drm/vgem/vgem_fence.c               |  12 +-
 drivers/gpu/drm/via/via_mm.c                    |   8 +-
 drivers/gpu/drm/virtio/virtgpu_kms.c            |   5 +-
 drivers/gpu/drm/virtio/virtgpu_vq.c             |   5 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_resource.c        |   9 +-
 drivers/i2c/i2c-core-base.c                     |  19 +-
 drivers/infiniband/core/cm.c                    |   8 +-
 drivers/infiniband/core/cma.c                   |  12 +-
 drivers/infiniband/core/rdma_core.c             |   9 +-
 drivers/infiniband/core/sa_query.c              |  23 +--
 drivers/infiniband/core/ucm.c                   |   7 +-
 drivers/infiniband/core/ucma.c                  |  14 +-
 drivers/infiniband/hw/cxgb3/iwch.c              |   4 +-
 drivers/infiniband/hw/cxgb3/iwch.h              |   4 +-
 drivers/infiniband/hw/cxgb4/device.c            |  18 +-
 drivers/infiniband/hw/cxgb4/iw_cxgb4.h          |   4 +-
 drivers/infiniband/hw/hfi1/init.c               |   9 +-
 drivers/infiniband/hw/hfi1/vnic_main.c          |   6 +-
 drivers/infiniband/hw/mlx4/cm.c                 |  13 +-
 drivers/infiniband/hw/ocrdma/ocrdma_main.c      |   7 +-
 drivers/infiniband/hw/qib/qib_init.c            |   9 +-
 drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c |  10 +-
 drivers/iommu/intel-svm.c                       |   9 +-
 drivers/md/dm.c                                 |  13 +-
 drivers/memstick/core/memstick.c                |  10 +-
 drivers/memstick/core/ms_block.c                |   9 +-
 drivers/memstick/core/mspro_block.c             |  12 +-
 drivers/mfd/rtsx_pcr.c                          |   9 +-
 drivers/misc/c2port/core.c                      |   7 +-
 drivers/misc/cxl/context.c                      |   8 +-
 drivers/misc/cxl/main.c                         |  15 +-
 drivers/misc/mei/main.c                         |   8 +-
 drivers/misc/mic/scif/scif_api.c                |  11 +-
 drivers/misc/mic/scif/scif_ports.c              |  18 +-
 drivers/misc/tifm_core.c                        |   9 +-
 drivers/mtd/mtdcore.c                           |   9 +-
 drivers/mtd/mtdcore.h                           |   2 +-
 drivers/mtd/ubi/block.c                         |   7 +-
 drivers/net/ppp/ppp_generic.c                   |  27 +--
 drivers/net/tap.c                               |  10 +-
 drivers/net/wireless/ath/ath10k/htt.h           |   3 +-
 drivers/net/wireless/ath/ath10k/htt_tx.c        |  22 ++-
 drivers/net/wireless/ath/ath10k/mac.c           |   2 +-
 drivers/net/wireless/marvell/mwifiex/main.c     |  13 +-
 drivers/net/wireless/marvell/mwifiex/wmm.c      |   2 +-
 drivers/of/overlay.c                            |  15 +-
 drivers/of/unittest.c                           |  25 ++-
 drivers/power/supply/bq2415x_charger.c          |  16 +-
 drivers/power/supply/bq27xxx_battery_i2c.c      |  15 +-
 drivers/power/supply/ds2782_battery.c           |   9 +-
 drivers/powercap/powercap_sys.c                 |   8 +-
 drivers/pps/pps.c                               |  10 +-
 drivers/rapidio/rio_cm.c                        |  17 +-
 drivers/remoteproc/remoteproc_core.c            |   8 +-
 drivers/rpmsg/virtio_rpmsg_bus.c                |   8 +-
 drivers/scsi/bfa/bfad_im.c                      |   8 +-
 drivers/scsi/ch.c                               |   8 +-
 drivers/scsi/lpfc/lpfc_crtn.h                   |   2 +-
 drivers/scsi/lpfc/lpfc_init.c                   |  11 +-
 drivers/scsi/lpfc/lpfc_vport.c                  |   8 +-
 drivers/scsi/sg.c                               |  10 +-
 drivers/scsi/st.c                               |   8 +-
 drivers/staging/greybus/uart.c                  |  22 +--
 drivers/staging/unisys/visorhba/visorhba_main.c |   7 +-
 drivers/target/iscsi/iscsi_target.c             |   7 +-
 drivers/target/iscsi/iscsi_target_login.c       |   9 +-
 drivers/target/target_core_device.c             |   9 +-
 drivers/target/target_core_user.c               |  13 +-
 drivers/tee/tee_shm.c                           |   8 +-
 drivers/uio/uio.c                               |   9 +-
 drivers/usb/class/cdc-acm.c                     |  24 +--
 drivers/usb/core/devices.c                      |   2 +-
 drivers/usb/core/hcd.c                          |   7 +-
 drivers/usb/mon/mon_main.c                      |   3 +-
 drivers/usb/serial/usb-serial.c                 |  11 +-
 drivers/vfio/vfio.c                             |  15 +-
 fs/dlm/lock.c                                   |   9 +-
 fs/dlm/lockspace.c                              |   6 +-
 fs/dlm/recover.c                                |  10 +-
 fs/nfs/nfs4client.c                             |   9 +-
 fs/nfsd/nfs4state.c                             |   8 +-
 fs/notify/inotify/inotify_fsnotify.c            |   4 +-
 fs/notify/inotify/inotify_user.c                |   9 +-
 fs/ocfs2/cluster/tcp.c                          |  10 +-
 include/linux/idr.h                             |  26 +--
 include/linux/of.h                              |   4 +-
 include/linux/radix-tree.h                      |   2 +-
 include/net/9p/9p.h                             |   2 +-
 include/net/act_api.h                           |  76 +++-----
 ipc/msg.c                                       |   2 +-
 ipc/sem.c                                       |   2 +-
 ipc/shm.c                                       |   4 +-
 ipc/util.c                                      |  17 +-
 kernel/bpf/syscall.c                            |  20 +-
 kernel/cgroup/cgroup.c                          |  57 +++---
 kernel/events/core.c                            |  10 +-
 kernel/workqueue.c                              |  15 +-
 lib/idr.c                                       |  38 ++--
 lib/radix-tree.c                                |   5 +-
 mm/memcontrol.c                                 |  11 +-
 net/9p/client.c                                 |  17 +-
 net/9p/util.c                                   |  14 +-
 net/core/net_namespace.c                        |  23 ++-
 net/mac80211/cfg.c                              |  23 +--
 net/mac80211/iface.c                            |   3 +-
 net/mac80211/main.c                             |   2 +-
 net/mac80211/tx.c                               |   7 +-
 net/mac80211/util.c                             |   3 +-
 net/netlink/genetlink.c                         |  18 +-
 net/qrtr/qrtr.c                                 |  21 +-
 net/rxrpc/conn_client.c                         |  15 +-
 net/sched/act_api.c                             | 249 +++++++++++-------------
 net/sched/act_bpf.c                             |  17 +-
 net/sched/act_connmark.c                        |  16 +-
 net/sched/act_csum.c                            |  16 +-
 net/sched/act_gact.c                            |  16 +-
 net/sched/act_ife.c                             |  20 +-
 net/sched/act_ipt.c                             |  26 ++-
 net/sched/act_mirred.c                          |  19 +-
 net/sched/act_nat.c                             |  16 +-
 net/sched/act_pedit.c                           |  18 +-
 net/sched/act_police.c                          |  18 +-
 net/sched/act_sample.c                          |  17 +-
 net/sched/act_simple.c                          |  20 +-
 net/sched/act_skbedit.c                         |  18 +-
 net/sched/act_skbmod.c                          |  18 +-
 net/sched/act_tunnel_key.c                      |  20 +-
 net/sched/act_vlan.c                            |  22 +--
 net/sched/cls_flower.c                          |  55 +++---
 net/sctp/associola.c                            |   8 +-
 net/tipc/server.c                               |   7 +-
 172 files changed, 1256 insertions(+), 1113 deletions(-)

-- 
1.8.3.1


------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
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^ permalink raw reply	[flat|nested] 6+ messages in thread

* [patch net-next 1/3] idr: Use unsigned long instead of int
       [not found] ` <1502849538-14284-1-git-send-email-chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
@ 2017-08-16  2:12   ` Chris Mi
  2017-08-16  2:12   ` [patch net-next 2/3] net/sched: Change cls_flower to use IDR Chris Mi
                     ` (2 subsequent siblings)
  3 siblings, 0 replies; 6+ messages in thread
From: Chris Mi @ 2017-08-16  2:12 UTC (permalink / raw)
  To: netdev-u79uwXL29TY76Z2rM5mHXA
  Cc: lucho-OnYtXJJ0/fesTnJN9+BGXg,
	sergey.senozhatsky.work-Re5JQEeQqe8AvxtiuMwx3w,
	snitzer-H+wXaHxf7aLQT0dZR+AlfA, wsa-z923LK4zBo2bacvFa/9K2g,
	markb-VPRAkNaXOzVWk0Htik3J/w, tom.leiming-Re5JQEeQqe8AvxtiuMwx3w,
	stefanr-MtYdepGKPcBMYopoZt5u/LNAH6kLmebB,
	zhi.a.wang-ral2JQCrhuEAvxtiuMwx3w, nsekhar-l0cyMroinI0,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	bfields-uC3wQj2KruNg9hUCZPvPmw,
	linux-sctp-u79uwXL29TY76Z2rM5mHXA, paulus-eUNUBHrolfbYtjvyW6yDsg,
	jinpu.wang-EIkl63zCoXaH+58JC4qpiA, pshelar-LZ6Gd1LRuIk,
	sumit.semwal-QSEj5FYQhm4dnm+yROfE0A, AlexBin.Xie-5C7GfCeVMHo,
	david1.zhou-5C7GfCeVMHo,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
	maximlevitsky-Re5JQEeQqe8AvxtiuMwx3w,
	sudarsana.kalluru-h88ZbnxC6KDQT0dZR+AlfA,
	marek.vasut-Re5JQEeQqe8AvxtiuMwx3w,
	linux-atm-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	dtwlin-Re5JQEeQqe8AvxtiuMwx3w, michel.daenzer-5C7GfCeVMHo,
	dledford-H+wXaHxf7aLQT0dZR+AlfA,
	tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
	longman-H+wXaHxf7aLQT0dZR+AlfA,
	niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w,
	philipp.reisner-63ez5xqkn6DQT0dZR+AlfA,
	shli-DgEjT+Ai2ygdnm+yROfE0A, linux-0h96xk9xTtrk1uMJSBkQmQ,
	ohad-Ix1uc/W3ht7QT0dZR+AlfA, pmladek-IBi9RG/b67k,
	dick.kennedy-dY08KVG/lbpWk0Htik3J/w

IDR uses internally radix tree which uses unsigned long. It doesn't
makes sense to have index as signed value.

Signed-off-by: Chris Mi <chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Jiri Pirko <jiri-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
 block/bsg.c                                     |  8 ++--
 block/genhd.c                                   | 12 +++---
 drivers/atm/nicstar.c                           | 11 ++---
 drivers/block/drbd/drbd_main.c                  | 31 ++++++++------
 drivers/block/drbd/drbd_nl.c                    | 22 +++++-----
 drivers/block/drbd/drbd_proc.c                  |  3 +-
 drivers/block/drbd/drbd_receiver.c              | 15 ++++---
 drivers/block/drbd/drbd_state.c                 | 34 ++++++++-------
 drivers/block/drbd/drbd_worker.c                |  6 +--
 drivers/block/loop.c                            | 17 +++++---
 drivers/block/nbd.c                             | 20 +++++----
 drivers/block/zram/zram_drv.c                   |  9 ++--
 drivers/char/tpm/tpm-chip.c                     | 10 +++--
 drivers/char/tpm/tpm.h                          |  2 +-
 drivers/dca/dca-sysfs.c                         |  9 ++--
 drivers/firewire/core-cdev.c                    | 18 ++++----
 drivers/firewire/core-device.c                  | 15 ++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c     |  8 ++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c         |  9 ++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c         |  6 +--
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c         |  2 +-
 drivers/gpu/drm/drm_auth.c                      |  9 ++--
 drivers/gpu/drm/drm_connector.c                 | 10 +++--
 drivers/gpu/drm/drm_context.c                   | 20 +++++----
 drivers/gpu/drm/drm_dp_aux_dev.c                | 11 ++---
 drivers/gpu/drm/drm_drv.c                       |  6 ++-
 drivers/gpu/drm/drm_gem.c                       | 19 +++++----
 drivers/gpu/drm/drm_info.c                      |  2 +-
 drivers/gpu/drm/drm_mode_object.c               | 11 +++--
 drivers/gpu/drm/drm_syncobj.c                   | 18 +++++---
 drivers/gpu/drm/exynos/exynos_drm_ipp.c         | 25 ++++++-----
 drivers/gpu/drm/i915/gvt/display.c              |  2 +-
 drivers/gpu/drm/i915/gvt/kvmgt.c                |  2 +-
 drivers/gpu/drm/i915/gvt/vgpu.c                 |  9 ++--
 drivers/gpu/drm/i915/i915_debugfs.c             |  6 +--
 drivers/gpu/drm/i915/i915_gem_context.c         |  9 ++--
 drivers/gpu/drm/qxl/qxl_cmd.c                   |  8 ++--
 drivers/gpu/drm/qxl/qxl_release.c               | 14 +++---
 drivers/gpu/drm/sis/sis_mm.c                    |  8 ++--
 drivers/gpu/drm/tegra/drm.c                     | 10 +++--
 drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c    |  3 +-
 drivers/gpu/drm/vgem/vgem_fence.c               | 12 +++---
 drivers/gpu/drm/via/via_mm.c                    |  8 ++--
 drivers/gpu/drm/virtio/virtgpu_kms.c            |  5 ++-
 drivers/gpu/drm/virtio/virtgpu_vq.c             |  5 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_resource.c        |  9 ++--
 drivers/i2c/i2c-core-base.c                     | 19 +++++----
 drivers/infiniband/core/cm.c                    |  8 ++--
 drivers/infiniband/core/cma.c                   | 12 +++---
 drivers/infiniband/core/rdma_core.c             |  9 ++--
 drivers/infiniband/core/sa_query.c              | 23 +++++-----
 drivers/infiniband/core/ucm.c                   |  7 ++-
 drivers/infiniband/core/ucma.c                  | 14 ++++--
 drivers/infiniband/hw/cxgb3/iwch.c              |  4 +-
 drivers/infiniband/hw/cxgb3/iwch.h              |  4 +-
 drivers/infiniband/hw/cxgb4/device.c            | 18 ++++----
 drivers/infiniband/hw/cxgb4/iw_cxgb4.h          |  4 +-
 drivers/infiniband/hw/hfi1/init.c               |  9 ++--
 drivers/infiniband/hw/hfi1/vnic_main.c          |  6 +--
 drivers/infiniband/hw/mlx4/cm.c                 | 13 +++---
 drivers/infiniband/hw/ocrdma/ocrdma_main.c      |  7 ++-
 drivers/infiniband/hw/qib/qib_init.c            |  9 ++--
 drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c | 10 ++---
 drivers/iommu/intel-svm.c                       |  9 ++--
 drivers/md/dm.c                                 | 13 +++---
 drivers/memstick/core/memstick.c                | 10 +++--
 drivers/memstick/core/ms_block.c                |  9 ++--
 drivers/memstick/core/mspro_block.c             | 12 ++++--
 drivers/mfd/rtsx_pcr.c                          |  9 ++--
 drivers/misc/c2port/core.c                      |  7 +--
 drivers/misc/cxl/context.c                      |  8 ++--
 drivers/misc/cxl/main.c                         | 15 ++++---
 drivers/misc/mei/main.c                         |  8 ++--
 drivers/misc/mic/scif/scif_api.c                | 11 ++---
 drivers/misc/mic/scif/scif_ports.c              | 18 ++++----
 drivers/misc/tifm_core.c                        |  9 ++--
 drivers/mtd/mtdcore.c                           |  9 ++--
 drivers/mtd/mtdcore.h                           |  2 +-
 drivers/mtd/ubi/block.c                         |  7 ++-
 drivers/net/ppp/ppp_generic.c                   | 27 ++++++------
 drivers/net/tap.c                               | 10 +++--
 drivers/net/wireless/ath/ath10k/htt.h           |  3 +-
 drivers/net/wireless/ath/ath10k/htt_tx.c        | 22 ++++++----
 drivers/net/wireless/ath/ath10k/mac.c           |  2 +-
 drivers/net/wireless/marvell/mwifiex/main.c     | 13 +++---
 drivers/net/wireless/marvell/mwifiex/wmm.c      |  2 +-
 drivers/of/overlay.c                            | 15 +++----
 drivers/of/unittest.c                           | 25 ++++++-----
 drivers/power/supply/bq2415x_charger.c          | 16 +++----
 drivers/power/supply/bq27xxx_battery_i2c.c      | 15 ++++---
 drivers/power/supply/ds2782_battery.c           |  9 ++--
 drivers/powercap/powercap_sys.c                 |  8 ++--
 drivers/pps/pps.c                               | 10 +++--
 drivers/rapidio/rio_cm.c                        | 17 ++++----
 drivers/remoteproc/remoteproc_core.c            |  8 ++--
 drivers/rpmsg/virtio_rpmsg_bus.c                |  8 ++--
 drivers/scsi/bfa/bfad_im.c                      |  8 ++--
 drivers/scsi/ch.c                               |  8 ++--
 drivers/scsi/lpfc/lpfc_crtn.h                   |  2 +-
 drivers/scsi/lpfc/lpfc_init.c                   | 11 +++--
 drivers/scsi/lpfc/lpfc_vport.c                  |  8 ++--
 drivers/scsi/sg.c                               | 10 +++--
 drivers/scsi/st.c                               |  8 ++--
 drivers/staging/greybus/uart.c                  | 22 +++++-----
 drivers/staging/unisys/visorhba/visorhba_main.c |  7 +--
 drivers/target/iscsi/iscsi_target.c             |  7 +--
 drivers/target/iscsi/iscsi_target_login.c       |  9 ++--
 drivers/target/target_core_device.c             |  9 ++--
 drivers/target/target_core_user.c               | 13 +++---
 drivers/tee/tee_shm.c                           |  8 ++--
 drivers/uio/uio.c                               |  9 ++--
 drivers/usb/class/cdc-acm.c                     | 24 ++++++-----
 drivers/usb/core/devices.c                      |  2 +-
 drivers/usb/core/hcd.c                          |  7 +--
 drivers/usb/mon/mon_main.c                      |  3 +-
 drivers/usb/serial/usb-serial.c                 | 11 ++---
 drivers/vfio/vfio.c                             | 15 ++++---
 fs/dlm/lock.c                                   |  9 ++--
 fs/dlm/lockspace.c                              |  6 +--
 fs/dlm/recover.c                                | 10 ++---
 fs/nfs/nfs4client.c                             |  9 ++--
 fs/nfsd/nfs4state.c                             |  8 ++--
 fs/notify/inotify/inotify_fsnotify.c            |  4 +-
 fs/notify/inotify/inotify_user.c                |  9 ++--
 fs/ocfs2/cluster/tcp.c                          | 10 +++--
 include/linux/idr.h                             | 26 +++++------
 include/linux/of.h                              |  4 +-
 include/linux/radix-tree.h                      |  2 +-
 include/net/9p/9p.h                             |  2 +-
 ipc/msg.c                                       |  2 +-
 ipc/sem.c                                       |  2 +-
 ipc/shm.c                                       |  4 +-
 ipc/util.c                                      | 17 ++++----
 kernel/bpf/syscall.c                            | 20 +++++----
 kernel/cgroup/cgroup.c                          | 57 +++++++++++++++----------
 kernel/events/core.c                            | 10 ++---
 kernel/workqueue.c                              | 15 ++++---
 lib/idr.c                                       | 38 ++++++++++-------
 lib/radix-tree.c                                |  5 ++-
 mm/memcontrol.c                                 | 11 +++--
 net/9p/client.c                                 | 17 ++++----
 net/9p/util.c                                   | 14 +++---
 net/core/net_namespace.c                        | 23 +++++-----
 net/mac80211/cfg.c                              | 23 +++++-----
 net/mac80211/iface.c                            |  3 +-
 net/mac80211/main.c                             |  2 +-
 net/mac80211/tx.c                               |  7 +--
 net/mac80211/util.c                             |  3 +-
 net/netlink/genetlink.c                         | 18 ++++----
 net/qrtr/qrtr.c                                 | 21 +++++----
 net/rxrpc/conn_client.c                         | 15 ++++---
 net/sctp/associola.c                            |  8 ++--
 net/tipc/server.c                               |  7 +--
 153 files changed, 956 insertions(+), 736 deletions(-)

diff --git a/block/bsg.c b/block/bsg.c
index 37663b6..c2969af 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -981,6 +981,7 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
 	int ret;
 	struct device *class_dev = NULL;
 	const char *devname;
+	unsigned long idr_index;
 
 	if (name)
 		devname = name;
@@ -998,8 +999,9 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
 
 	mutex_lock(&bsg_mutex);
 
-	ret = idr_alloc(&bsg_minor_idr, bcd, 0, BSG_MAX_DEVS, GFP_KERNEL);
-	if (ret < 0) {
+	ret = idr_alloc(&bsg_minor_idr, bcd, &idr_index, 0, BSG_MAX_DEVS,
+			GFP_KERNEL);
+	if (ret) {
 		if (ret == -ENOSPC) {
 			printk(KERN_ERR "bsg: too many bsg devices\n");
 			ret = -EINVAL;
@@ -1007,7 +1009,7 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
 		goto unlock;
 	}
 
-	bcd->minor = ret;
+	bcd->minor = idr_index;
 	bcd->queue = q;
 	bcd->parent = get_device(parent);
 	bcd->release = release;
diff --git a/block/genhd.c b/block/genhd.c
index 7f520fa..1f7d7c3 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -414,7 +414,8 @@ static int blk_mangle_minor(int minor)
 int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
 {
 	struct gendisk *disk = part_to_disk(part);
-	int idx;
+	unsigned long idr_index;
+	int ret;
 
 	/* in consecutive minor range? */
 	if (part->partno < disk->minors) {
@@ -426,14 +427,15 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
 	idr_preload(GFP_KERNEL);
 
 	spin_lock_bh(&ext_devt_lock);
-	idx = idr_alloc(&ext_devt_idr, part, 0, NR_EXT_DEVT, GFP_NOWAIT);
+	ret = idr_alloc(&ext_devt_idr, part, &idr_index, 0, NR_EXT_DEVT,
+			GFP_NOWAIT);
 	spin_unlock_bh(&ext_devt_lock);
 
 	idr_preload_end();
-	if (idx < 0)
-		return idx == -ENOSPC ? -EBUSY : idx;
+	if (ret)
+		return ret == -ENOSPC ? -EBUSY : ret;
 
-	*devt = MKDEV(BLOCK_EXT_MAJOR, blk_mangle_minor(idx));
+	*devt = MKDEV(BLOCK_EXT_MAJOR, blk_mangle_minor(idr_index));
 	return 0;
 }
 
diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index a970283..92b9ba5 100644
--- a/drivers/atm/nicstar.c
+++ b/drivers/atm/nicstar.c
@@ -943,7 +943,8 @@ static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
 static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
 {
 	struct sk_buff *handle1, *handle2;
-	int id1, id2;
+	int ret;
+	unsigned long id1, id2;
 	u32 addr1, addr2;
 	u32 stat;
 	unsigned long flags;
@@ -1019,12 +1020,12 @@ static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
 				card->lbfqc += 2;
 		}
 
-		id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC);
-		if (id1 < 0)
+		ret = idr_alloc(&card->idr, handle1, &id1, 0, 0, GFP_ATOMIC);
+		if (ret)
 			goto out;
 
-		id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC);
-		if (id2 < 0)
+		ret = idr_alloc(&card->idr, handle2, &id2, 0, 0, GFP_ATOMIC);
+		if (ret)
 			goto out;
 
 		spin_lock_irqsave(&card->res_lock, flags);
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index e2ed28d..4ee5a91 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -489,7 +489,8 @@ void _drbd_thread_stop(struct drbd_thread *thi, int restart, int wait)
 int conn_lowest_minor(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr = 0, minor = -1;
+	int minor = -1;
+	unsigned long vnr = 0;
 
 	rcu_read_lock();
 	peer_device = idr_get_next(&connection->peer_devices, &vnr);
@@ -2390,7 +2391,7 @@ void drbd_free_resource(struct drbd_resource *resource)
 
 static void drbd_cleanup(void)
 {
-	unsigned int i;
+	unsigned long i;
 	struct drbd_device *device;
 	struct drbd_resource *resource, *tmp;
 
@@ -2794,7 +2795,8 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 	struct drbd_peer_device *peer_device, *tmp_peer_device;
 	struct gendisk *disk;
 	struct request_queue *q;
-	int id;
+	int ret;
+	unsigned long idr_index;
 	int vnr = adm_ctx->volume;
 	enum drbd_ret_code err = ERR_NOMEM;
 
@@ -2858,17 +2860,19 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 	device->read_requests = RB_ROOT;
 	device->write_requests = RB_ROOT;
 
-	id = idr_alloc(&drbd_devices, device, minor, minor + 1, GFP_KERNEL);
-	if (id < 0) {
-		if (id == -ENOSPC)
+	ret = idr_alloc(&drbd_devices, device, &idr_index, minor, minor + 1,
+			GFP_KERNEL);
+	if (ret) {
+		if (ret == -ENOSPC)
 			err = ERR_MINOR_OR_VOLUME_EXISTS;
 		goto out_no_minor_idr;
 	}
 	kref_get(&device->kref);
 
-	id = idr_alloc(&resource->devices, device, vnr, vnr + 1, GFP_KERNEL);
-	if (id < 0) {
-		if (id == -ENOSPC)
+	ret = idr_alloc(&resource->devices, device, &idr_index, vnr, vnr + 1,
+			GFP_KERNEL);
+	if (ret) {
+		if (ret == -ENOSPC)
 			err = ERR_MINOR_OR_VOLUME_EXISTS;
 		goto out_idr_remove_minor;
 	}
@@ -2886,9 +2890,10 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 		list_add(&peer_device->peer_devices, &device->peer_devices);
 		kref_get(&device->kref);
 
-		id = idr_alloc(&connection->peer_devices, peer_device, vnr, vnr + 1, GFP_KERNEL);
-		if (id < 0) {
-			if (id == -ENOSPC)
+		ret = idr_alloc(&connection->peer_devices, peer_device,
+				&idr_index, vnr, vnr + 1, GFP_KERNEL);
+		if (ret) {
+			if (ret == -ENOSPC)
 				err = ERR_INVALID_REQUEST;
 			goto out_idr_remove_from_resource;
 		}
@@ -3072,7 +3077,7 @@ void drbd_free_sock(struct drbd_connection *connection)
 void conn_md_sync(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index ad0fcb4..913adf5 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -428,7 +428,7 @@ static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connec
 {
 	enum drbd_fencing_p fp = FP_NOT_AVAIL;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -2209,7 +2209,7 @@ static bool conn_resync_running(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
 	bool rv = false;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -2231,7 +2231,7 @@ static bool conn_ov_running(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
 	bool rv = false;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -2251,7 +2251,7 @@ static bool conn_ov_running(struct drbd_connection *connection)
 _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_conf *new_net_conf)
 {
 	struct drbd_peer_device *peer_device;
-	int i;
+	unsigned long i;
 
 	if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 100) {
 		if (new_net_conf->wire_protocol != old_net_conf->wire_protocol)
@@ -2488,7 +2488,7 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
 
 	if (connection->cstate >= C_WF_REPORT_PARAMS) {
 		struct drbd_peer_device *peer_device;
-		int vnr;
+		unsigned long vnr;
 
 		idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
 			drbd_send_sync_param(peer_device);
@@ -2542,7 +2542,7 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
 	struct drbd_resource *resource;
 	struct drbd_connection *connection;
 	enum drbd_ret_code retcode;
-	int i;
+	unsigned long i;
 	int err;
 
 	retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
@@ -3382,7 +3382,8 @@ int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb)
 	struct nlattr *resource_filter;
 	struct drbd_resource *resource;
 	struct drbd_device *uninitialized_var(device);
-	int minor, err, retcode;
+	int err, retcode;
+	unsigned long minor;
 	struct drbd_genlmsghdr *dh;
 	struct device_info device_info;
 	struct device_statistics device_statistics;
@@ -3634,7 +3635,8 @@ int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb)
 	struct drbd_resource *resource;
 	struct drbd_device *uninitialized_var(device);
 	struct drbd_peer_device *peer_device = NULL;
-	int minor, err, retcode;
+	int err, retcode;
+	unsigned long minor;
 	struct drbd_genlmsghdr *dh;
 	struct idr *idr_to_search;
 
@@ -3887,7 +3889,7 @@ static int get_one_status(struct sk_buff *skb, struct netlink_callback *cb)
 	struct drbd_resource *pos = (struct drbd_resource *)cb->args[0];
 	struct drbd_resource *resource = NULL;
 	struct drbd_resource *tmp;
-	unsigned volume = cb->args[1];
+	unsigned long volume = cb->args[1];
 
 	/* Open coded, deferred, iteration:
 	 * for_each_resource_safe(resource, tmp, &drbd_resources) {
@@ -4464,7 +4466,7 @@ int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)
 	struct drbd_connection *connection;
 	struct drbd_device *device;
 	int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
-	unsigned i;
+	unsigned long i;
 
 	retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
 	if (!adm_ctx.reply_skb)
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c
index 8378142..1c9c5b8 100644
--- a/drivers/block/drbd/drbd_proc.c
+++ b/drivers/block/drbd/drbd_proc.c
@@ -237,7 +237,8 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
 
 static int drbd_seq_show(struct seq_file *seq, void *v)
 {
-	int i, prev_i = -1;
+	int prev_i = -1;
+	unsigned long i;
 	const char *sn;
 	struct drbd_device *device;
 	struct net_conf *nc;
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index c7e95e6..64ab66e 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -232,7 +232,7 @@ static void drbd_reclaim_net_peer_reqs(struct drbd_device *device)
 static void conn_reclaim_net_peer_reqs(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -934,7 +934,8 @@ static int conn_connect(struct drbd_connection *connection)
 	struct drbd_socket sock, msock;
 	struct drbd_peer_device *peer_device;
 	struct net_conf *nc;
-	int vnr, timeout, h;
+	int timeout, h;
+	unsigned long vnr;
 	bool discard_my_data, ok;
 	enum drbd_state_rv rv;
 	struct accept_wait_data ad = {
@@ -1281,7 +1282,7 @@ static void drbd_flush(struct drbd_connection *connection)
 	if (connection->resource->write_ordering >= WO_BDEV_FLUSH) {
 		struct drbd_peer_device *peer_device;
 		struct issue_flush_context ctx;
-		int vnr;
+		unsigned long vnr;
 
 		atomic_set(&ctx.pending, 1);
 		ctx.error = 0;
@@ -1418,7 +1419,7 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin
 {
 	struct drbd_device *device;
 	enum write_ordering_e pwo;
-	int vnr;
+	unsigned long vnr;
 	static char *write_ordering_str[] = {
 		[WO_NONE] = "none",
 		[WO_DRAIN_IO] = "drain",
@@ -1606,7 +1607,7 @@ static void drbd_remove_epoch_entry_interval(struct drbd_device *device,
 static void conn_wait_active_ee_empty(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -4933,7 +4934,7 @@ static void conn_disconnect(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
 	enum drbd_conns oc;
-	int vnr;
+	unsigned long vnr;
 
 	if (connection->cstate == C_STANDALONE)
 		return;
@@ -5644,7 +5645,7 @@ static int got_BarrierAck(struct drbd_connection *connection, struct packet_info
 {
 	struct p_barrier_ack *p = pi->data;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	tl_release(connection, p->barrier, be32_to_cpu(p->set_size));
 
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index eea0c4a..d6566d0 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -56,7 +56,7 @@ static void count_objects(struct drbd_resource *resource,
 {
 	struct drbd_device *device;
 	struct drbd_connection *connection;
-	int vnr;
+	unsigned long vnr;
 
 	*n_devices = 0;
 	*n_connections = 0;
@@ -99,7 +99,7 @@ struct drbd_state_change *remember_old_state(struct drbd_resource *resource, gfp
 	unsigned int n_devices;
 	struct drbd_connection *connection;
 	unsigned int n_connections;
-	int vnr;
+	unsigned long vnr;
 
 	struct drbd_device_state_change *device_state_change;
 	struct drbd_peer_device_state_change *peer_device_state_change;
@@ -307,7 +307,7 @@ bool conn_all_vols_unconf(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
 	bool rv = true;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -348,7 +348,7 @@ enum drbd_role conn_highest_role(struct drbd_connection *connection)
 {
 	enum drbd_role role = R_UNKNOWN;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -364,7 +364,7 @@ enum drbd_role conn_highest_peer(struct drbd_connection *connection)
 {
 	enum drbd_role peer = R_UNKNOWN;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -380,7 +380,7 @@ enum drbd_disk_state conn_highest_disk(struct drbd_connection *connection)
 {
 	enum drbd_disk_state disk_state = D_DISKLESS;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -396,7 +396,7 @@ enum drbd_disk_state conn_lowest_disk(struct drbd_connection *connection)
 {
 	enum drbd_disk_state disk_state = D_MASK;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -412,7 +412,7 @@ enum drbd_disk_state conn_highest_pdsk(struct drbd_connection *connection)
 {
 	enum drbd_disk_state disk_state = D_DISKLESS;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -428,7 +428,7 @@ enum drbd_conns conn_lowest_conn(struct drbd_connection *connection)
 {
 	enum drbd_conns conn = C_MASK;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -443,7 +443,7 @@ enum drbd_conns conn_lowest_conn(struct drbd_connection *connection)
 static bool no_peer_wf_report_params(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 	bool rv = true;
 
 	rcu_read_lock();
@@ -460,7 +460,7 @@ static bool no_peer_wf_report_params(struct drbd_connection *connection)
 static void wake_up_all_devices(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
@@ -1723,7 +1723,7 @@ static void after_state_ch(struct drbd_device *device, union drbd_state os,
 		if (resource->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) {
 			/* case2: The connection was established again: */
 			struct drbd_peer_device *peer_device;
-			int vnr;
+			unsigned long vnr;
 
 			rcu_read_lock();
 			idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
@@ -2010,7 +2010,7 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
 	enum drbd_conns oc = acscw->oc;
 	union drbd_state ns_max = acscw->ns_max;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	broadcast_state_change(acscw->state_change);
 	forget_state_change(acscw->state_change);
@@ -2074,7 +2074,8 @@ static void conn_old_common_state(struct drbd_connection *connection, union drbd
 {
 	enum chg_state_flags flags = ~0;
 	struct drbd_peer_device *peer_device;
-	int vnr, first_vol = 1;
+	int first_vol = 1;
+	unsigned long vnr;
 	union drbd_dev_state os, cs = {
 		{ .role = R_SECONDARY,
 		  .peer = R_UNKNOWN,
@@ -2123,7 +2124,7 @@ static void conn_old_common_state(struct drbd_connection *connection, union drbd
 	enum drbd_state_rv rv = SS_SUCCESS;
 	union drbd_state ns, os;
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -2173,7 +2174,8 @@ static void conn_old_common_state(struct drbd_connection *connection, union drbd
 		} };
 	struct drbd_peer_device *peer_device;
 	enum drbd_state_rv rv;
-	int vnr, number_of_volumes = 0;
+	int number_of_volumes = 0;
+	unsigned long vnr;
 
 	if (mask.conn == C_MASK) {
 		/* remember last connect time so request_timer_fn() won't
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 1d8726a..8129b00 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1553,7 +1553,7 @@ static bool drbd_pause_after(struct drbd_device *device)
 {
 	bool changed = false;
 	struct drbd_device *odev;
-	int i;
+	unsigned long i;
 
 	rcu_read_lock();
 	idr_for_each_entry(&drbd_devices, odev, i) {
@@ -2035,7 +2035,7 @@ static unsigned long get_work_bits(unsigned long *flags)
 static void do_unqueued_work(struct drbd_connection *connection)
 {
 	struct drbd_peer_device *peer_device;
-	int vnr;
+	unsigned long vnr;
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
@@ -2152,7 +2152,7 @@ int drbd_worker(struct drbd_thread *thi)
 	struct drbd_work *w = NULL;
 	struct drbd_peer_device *peer_device;
 	LIST_HEAD(work_list);
-	int vnr;
+	unsigned long vnr;
 
 	while (get_t_state(thi) == RUNNING) {
 		drbd_thread_current_set_cpu(thi);
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index ef83349..6308b44 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1655,7 +1655,7 @@ int loop_register_transfer(struct loop_func_table *funcs)
 	return 0;
 }
 
-static int unregister_transfer_cb(int id, void *ptr, void *data)
+static int unregister_transfer_cb(unsigned long id, void *ptr, void *data)
 {
 	struct loop_device *lo = ptr;
 	struct loop_func_table *xfer = data;
@@ -1759,6 +1759,7 @@ static int loop_add(struct loop_device **l, int i)
 {
 	struct loop_device *lo;
 	struct gendisk *disk;
+	unsigned long idr_index;
 	int err;
 
 	err = -ENOMEM;
@@ -1770,15 +1771,17 @@ static int loop_add(struct loop_device **l, int i)
 
 	/* allocate id, if @id >= 0, we're requesting that specific id */
 	if (i >= 0) {
-		err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL);
+		err = idr_alloc(&loop_index_idr, lo, &idr_index, i, i + 1,
+				GFP_KERNEL);
 		if (err == -ENOSPC)
 			err = -EEXIST;
 	} else {
-		err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL);
+		err = idr_alloc(&loop_index_idr, lo, &idr_index, 0, 0,
+				GFP_KERNEL);
 	}
-	if (err < 0)
+	if (err)
 		goto out_free_dev;
-	i = err;
+	i = idr_index;
 
 	err = -ENOMEM;
 	lo->tag_set.ops = &loop_mq_ops;
@@ -1867,7 +1870,7 @@ static void loop_remove(struct loop_device *lo)
 	kfree(lo);
 }
 
-static int find_free_cb(int id, void *ptr, void *data)
+static int find_free_cb(unsigned long id, void *ptr, void *data)
 {
 	struct loop_device *lo = ptr;
 	struct loop_device **l = data;
@@ -2063,7 +2066,7 @@ static int __init loop_init(void)
 	return err;
 }
 
-static int loop_exit_cb(int id, void *ptr, void *data)
+static int loop_exit_cb(unsigned long id, void *ptr, void *data)
 {
 	struct loop_device *lo = ptr;
 
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 5bdf923..f55b695 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1427,6 +1427,7 @@ static int nbd_dev_add(int index)
 	struct nbd_device *nbd;
 	struct gendisk *disk;
 	struct request_queue *q;
+	unsigned long idr_index;
 	int err = -ENOMEM;
 
 	nbd = kzalloc(sizeof(struct nbd_device), GFP_KERNEL);
@@ -1438,16 +1439,17 @@ static int nbd_dev_add(int index)
 		goto out_free_nbd;
 
 	if (index >= 0) {
-		err = idr_alloc(&nbd_index_idr, nbd, index, index + 1,
-				GFP_KERNEL);
+		err = idr_alloc(&nbd_index_idr, nbd, &idr_index,
+				index, index + 1, GFP_KERNEL);
 		if (err == -ENOSPC)
 			err = -EEXIST;
 	} else {
-		err = idr_alloc(&nbd_index_idr, nbd, 0, 0, GFP_KERNEL);
-		if (err >= 0)
-			index = err;
+		err = idr_alloc(&nbd_index_idr, nbd, &idr_index,
+				0, 0, GFP_KERNEL);
+		if (err == 0)
+			index = idr_index;
 	}
-	if (err < 0)
+	if (err)
 		goto out_free_disk;
 
 	nbd->index = index;
@@ -1509,7 +1511,7 @@ static int nbd_dev_add(int index)
 	return err;
 }
 
-static int find_free_cb(int id, void *ptr, void *data)
+static int find_free_cb(unsigned long id, void *ptr, void *data)
 {
 	struct nbd_device *nbd = ptr;
 	struct nbd_device **found = data;
@@ -1922,7 +1924,7 @@ static int populate_nbd_status(struct nbd_device *nbd, struct sk_buff *reply)
 	return 0;
 }
 
-static int status_cb(int id, void *ptr, void *data)
+static int status_cb(unsigned long id, void *ptr, void *data)
 {
 	struct nbd_device *nbd = ptr;
 	return populate_nbd_status(nbd, (struct sk_buff *)data);
@@ -2094,7 +2096,7 @@ static int __init nbd_init(void)
 	return 0;
 }
 
-static int nbd_exit_cb(int id, void *ptr, void *data)
+static int nbd_exit_cb(unsigned long id, void *ptr, void *data)
 {
 	struct list_head *list = (struct list_head *)data;
 	struct nbd_device *nbd = ptr;
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 856d5dc02..7b4d9fb 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1137,15 +1137,16 @@ static int zram_add(void)
 	struct zram *zram;
 	struct request_queue *queue;
 	int ret, device_id;
+	unsigned long idr_index;
 
 	zram = kzalloc(sizeof(struct zram), GFP_KERNEL);
 	if (!zram)
 		return -ENOMEM;
 
-	ret = idr_alloc(&zram_index_idr, zram, 0, 0, GFP_KERNEL);
-	if (ret < 0)
+	ret = idr_alloc(&zram_index_idr, zram, &idr_index, 0, 0, GFP_KERNEL);
+	if (ret)
 		goto out_free_dev;
-	device_id = ret;
+	device_id = idr_index;
 
 	init_rwsem(&zram->init_lock);
 
@@ -1341,7 +1342,7 @@ static ssize_t hot_remove_store(struct class *class,
 	.class_groups	= zram_control_class_groups,
 };
 
-static int zram_remove_cb(int id, void *ptr, void *data)
+static int zram_remove_cb(unsigned long id, void *ptr, void *data)
 {
 	zram_remove(ptr);
 	return 0;
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 67ec9d3..70cea3c 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -86,7 +86,7 @@ void tpm_put_ops(struct tpm_chip *chip)
  * The return'd chip has been tpm_try_get_ops'd and must be released via
  * tpm_put_ops
  */
-struct tpm_chip *tpm_chip_find_get(int chip_num)
+struct tpm_chip *tpm_chip_find_get(unsigned long chip_num)
 {
 	struct tpm_chip *chip, *res = NULL;
 	int chip_prev;
@@ -189,6 +189,7 @@ struct tpm_chip *tpm_chip_alloc(struct device *pdev,
 				const struct tpm_class_ops *ops)
 {
 	struct tpm_chip *chip;
+	unsigned long idr_index;
 	int rc;
 
 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
@@ -201,14 +202,15 @@ struct tpm_chip *tpm_chip_alloc(struct device *pdev,
 	chip->ops = ops;
 
 	mutex_lock(&idr_lock);
-	rc = idr_alloc(&dev_nums_idr, NULL, 0, TPM_NUM_DEVICES, GFP_KERNEL);
+	rc = idr_alloc(&dev_nums_idr, NULL, &idr_index, 0, TPM_NUM_DEVICES,
+		       GFP_KERNEL);
 	mutex_unlock(&idr_lock);
-	if (rc < 0) {
+	if (rc) {
 		dev_err(pdev, "No available tpm device numbers\n");
 		kfree(chip);
 		return ERR_PTR(rc);
 	}
-	chip->dev_num = rc;
+	chip->dev_num = idr_index;
 
 	device_initialize(&chip->dev);
 	device_initialize(&chip->devs);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 04fbff2..5e6538b 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -527,7 +527,7 @@ ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
 int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
 		      wait_queue_head_t *queue, bool check_cancel);
 
-struct tpm_chip *tpm_chip_find_get(int chip_num);
+struct tpm_chip *tpm_chip_find_get(unsigned long chip_num);
 __must_check int tpm_try_get_ops(struct tpm_chip *chip);
 void tpm_put_ops(struct tpm_chip *chip);
 
diff --git a/drivers/dca/dca-sysfs.c b/drivers/dca/dca-sysfs.c
index 126cf29..93a7798 100644
--- a/drivers/dca/dca-sysfs.c
+++ b/drivers/dca/dca-sysfs.c
@@ -53,18 +53,19 @@ void dca_sysfs_remove_req(struct dca_provider *dca, int slot)
 int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev)
 {
 	struct device *cd;
+	unsigned long idr_index;
 	int ret;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&dca_idr_lock);
 
-	ret = idr_alloc(&dca_idr, dca, 0, 0, GFP_NOWAIT);
-	if (ret >= 0)
-		dca->id = ret;
+	ret = idr_alloc(&dca_idr, dca, &idr_index, 0, 0, GFP_NOWAIT);
+	if (ret == 0)
+		dca->id = idr_index;
 
 	spin_unlock(&dca_idr_lock);
 	idr_preload_end();
-	if (ret < 0)
+	if (ret)
 		return ret;
 
 	cd = device_create(dca_class, dev, MKDEV(0, 0), NULL, "dca%d", dca->id);
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index a301fcf..162c2b5 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -378,7 +378,7 @@ static void for_each_client(struct fw_device *device,
 	mutex_unlock(&device->client_list_mutex);
 }
 
-static int schedule_reallocations(int id, void *p, void *data)
+static int schedule_reallocations(unsigned long id, void *p, void *data)
 {
 	schedule_if_iso_resource(p);
 
@@ -488,6 +488,7 @@ static int add_client_resource(struct client *client,
 {
 	bool preload = gfpflags_allow_blocking(gfp_mask);
 	unsigned long flags;
+	unsigned long idr_index;
 	int ret;
 
 	if (preload)
@@ -497,10 +498,10 @@ static int add_client_resource(struct client *client,
 	if (client->in_shutdown)
 		ret = -ECANCELED;
 	else
-		ret = idr_alloc(&client->resource_idr, resource, 0, 0,
-				GFP_NOWAIT);
-	if (ret >= 0) {
-		resource->handle = ret;
+		ret = idr_alloc(&client->resource_idr, resource, &idr_index,
+				0, 0, GFP_NOWAIT);
+	if (ret == 0) {
+		resource->handle = idr_index;
 		client_get(client);
 		schedule_if_iso_resource(resource);
 	}
@@ -509,7 +510,7 @@ static int add_client_resource(struct client *client,
 	if (preload)
 		idr_preload_end();
 
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 static int release_client_resource(struct client *client, u32 handle,
@@ -1717,7 +1718,8 @@ static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
 	return ret;
 }
 
-static int is_outbound_transaction_resource(int id, void *p, void *data)
+static int is_outbound_transaction_resource(unsigned long id, void *p,
+					    void *data)
 {
 	struct client_resource *resource = p;
 
@@ -1736,7 +1738,7 @@ static int has_outbound_transactions(struct client *client)
 	return ret;
 }
 
-static int shutdown_resource(int id, void *p, void *data)
+static int shutdown_resource(unsigned long id, void *p, void *data)
 {
 	struct client_resource *resource = p;
 	struct client *client = data;
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 7c2eed7..2fe2e67 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -1000,7 +1000,8 @@ static void fw_device_init(struct work_struct *work)
 		container_of(work, struct fw_device, work.work);
 	struct fw_card *card = device->card;
 	struct device *revived_dev;
-	int minor, ret;
+	int ret;
+	unsigned long idr_index;
 
 	/*
 	 * All failure paths here set node->data to NULL, so that we
@@ -1039,18 +1040,18 @@ static void fw_device_init(struct work_struct *work)
 
 	fw_device_get(device);
 	down_write(&fw_device_rwsem);
-	minor = idr_alloc(&fw_device_idr, device, 0, 1 << MINORBITS,
-			GFP_KERNEL);
+	ret = idr_alloc(&fw_device_idr, device, &idr_index,
+			0, 1 << MINORBITS, GFP_KERNEL);
 	up_write(&fw_device_rwsem);
 
-	if (minor < 0)
+	if (ret)
 		goto error;
 
 	device->device.bus = &fw_bus_type;
 	device->device.type = &fw_device_type;
 	device->device.parent = card->device;
-	device->device.devt = MKDEV(fw_cdev_major, minor);
-	dev_set_name(&device->device, "fw%d", minor);
+	device->device.devt = MKDEV(fw_cdev_major, idr_index);
+	dev_set_name(&device->device, "fw%ld", idr_index);
 
 	BUILD_BUG_ON(ARRAY_SIZE(device->attribute_group.attrs) <
 			ARRAY_SIZE(fw_device_attributes) +
@@ -1105,7 +1106,7 @@ static void fw_device_init(struct work_struct *work)
 
  error_with_cdev:
 	down_write(&fw_device_rwsem);
-	idr_remove(&fw_device_idr, minor);
+	idr_remove(&fw_device_idr, idr_index);
 	up_write(&fw_device_rwsem);
  error:
 	fw_device_put(device);		/* fw_device_idr's reference */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
index 5e771bc..617e6aa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
@@ -62,6 +62,7 @@ static int amdgpu_bo_list_create(struct amdgpu_device *adev,
 				 int *id)
 {
 	int r;
+	unsigned long idr_index;
 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
 	struct amdgpu_bo_list *list;
 
@@ -80,13 +81,14 @@ static int amdgpu_bo_list_create(struct amdgpu_device *adev,
 
 	/* idr alloc should be called only after initialization of bo list. */
 	mutex_lock(&fpriv->bo_list_lock);
-	r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL);
+	r = idr_alloc(&fpriv->bo_list_handles, list, &idr_index, 1, 0,
+		      GFP_KERNEL);
 	mutex_unlock(&fpriv->bo_list_lock);
-	if (r < 0) {
+	if (r) {
 		kfree(list);
 		return r;
 	}
-	*id = r;
+	*id = idr_index;
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index a11e443..4117764 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -104,6 +104,7 @@ static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
 {
 	struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
 	struct amdgpu_ctx *ctx;
+	unsigned long idr_index;
 	int r;
 
 	ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
@@ -111,13 +112,13 @@ static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
 		return -ENOMEM;
 
 	mutex_lock(&mgr->lock);
-	r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
-	if (r < 0) {
+	r = idr_alloc(&mgr->ctx_handles, ctx, &idr_index, 1, 0, GFP_KERNEL);
+	if (r) {
 		mutex_unlock(&mgr->lock);
 		kfree(ctx);
 		return r;
 	}
-	*id = (uint32_t)r;
+	*id = (uint32_t)idr_index;
 	r = amdgpu_ctx_init(adev, ctx);
 	if (r) {
 		idr_remove(&mgr->ctx_handles, *id);
@@ -313,7 +314,7 @@ void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
 {
 	struct amdgpu_ctx *ctx;
 	struct idr *idp;
-	uint32_t id;
+	unsigned long id;
 
 	idp = &mgr->ctx_handles;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 621f739..698a0b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -97,7 +97,7 @@ void amdgpu_gem_force_release(struct amdgpu_device *adev)
 
 	list_for_each_entry(file, &ddev->filelist, lhead) {
 		struct drm_gem_object *gobj;
-		int handle;
+		unsigned long handle;
 
 		WARN_ONCE(1, "Still active user space clients!\n");
 		spin_lock(&file->table_lock);
@@ -775,7 +775,7 @@ int amdgpu_mode_dumb_create(struct drm_file *file_priv,
 }
 
 #if defined(CONFIG_DEBUG_FS)
-static int amdgpu_debugfs_gem_bo_info(int id, void *ptr, void *data)
+static int amdgpu_debugfs_gem_bo_info(unsigned long id, void *ptr, void *data)
 {
 	struct drm_gem_object *gobj = ptr;
 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
@@ -798,7 +798,7 @@ static int amdgpu_debugfs_gem_bo_info(int id, void *ptr, void *data)
 		placement = " CPU";
 		break;
 	}
-	seq_printf(m, "\t0x%08x: %12ld byte %s @ 0x%010Lx",
+	seq_printf(m, "\t0x%08lx: %12ld byte %s @ 0x%010llx",
 		   id, amdgpu_bo_size(bo), placement,
 		   amdgpu_bo_gpu_offset(bo));
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index b0b2310..0074dd6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -873,7 +873,7 @@ void amdgpu_driver_postclose_kms(struct drm_device *dev,
 	struct amdgpu_device *adev = dev->dev_private;
 	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 	struct amdgpu_bo_list *list;
-	int handle;
+	unsigned long handle;
 
 	if (!fpriv)
 		return;
diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 7ff6973..345ff34 100644
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -57,21 +57,22 @@
 int drm_getmagic(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
 	struct drm_auth *auth = data;
+	unsigned long idr_index;
 	int ret = 0;
 
 	mutex_lock(&dev->master_mutex);
 	if (!file_priv->magic) {
 		ret = idr_alloc(&file_priv->master->magic_map, file_priv,
-				1, 0, GFP_KERNEL);
-		if (ret >= 0)
-			file_priv->magic = ret;
+				&idr_index, 1, 0, GFP_KERNEL);
+		if (ret == 0)
+			file_priv->magic = idr_index;
 	}
 	auth->magic = file_priv->magic;
 	mutex_unlock(&dev->master_mutex);
 
 	DRM_DEBUG("%u\n", auth->magic);
 
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 int drm_authmagic(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 8072e6e..555a598 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1431,7 +1431,7 @@ struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
 					       char topology[8])
 {
 	struct drm_tile_group *tg;
-	int id;
+	unsigned long id;
 	mutex_lock(&dev->mode_config.idr_mutex);
 	idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
 		if (!memcmp(tg->group_data, topology, 8)) {
@@ -1461,6 +1461,7 @@ struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
 						  char topology[8])
 {
 	struct drm_tile_group *tg;
+	unsigned long idr_index;
 	int ret;
 
 	tg = kzalloc(sizeof(*tg), GFP_KERNEL);
@@ -1472,9 +1473,10 @@ struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
 	tg->dev = dev;
 
 	mutex_lock(&dev->mode_config.idr_mutex);
-	ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
-	if (ret >= 0) {
-		tg->id = ret;
+	ret = idr_alloc(&dev->mode_config.tile_idr, tg, &idr_index, 1, 0,
+			GFP_KERNEL);
+	if (ret == 0) {
+		tg->id = idr_index;
 	} else {
 		kfree(tg);
 		tg = ERR_PTR(ret);
diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index 3c4000f..cc983c2 100644
--- a/drivers/gpu/drm/drm_context.c
+++ b/drivers/gpu/drm/drm_context.c
@@ -71,13 +71,14 @@ void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
  * Allocate a new idr from drm_device::ctx_idr while holding the
  * drm_device::struct_mutex lock.
  */
-static int drm_legacy_ctxbitmap_next(struct drm_device * dev)
+static int drm_legacy_ctxbitmap_next(struct drm_device *dev,
+				     unsigned long *handle)
 {
 	int ret;
 
 	mutex_lock(&dev->struct_mutex);
-	ret = idr_alloc(&dev->ctx_idr, NULL, DRM_RESERVED_CONTEXTS, 0,
-			GFP_KERNEL);
+	ret = idr_alloc(&dev->ctx_idr, NULL, handle,
+			DRM_RESERVED_CONTEXTS, 0, GFP_KERNEL);
 	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
@@ -361,18 +362,21 @@ int drm_legacy_addctx(struct drm_device *dev, void *data,
 {
 	struct drm_ctx_list *ctx_entry;
 	struct drm_ctx *ctx = data;
+	unsigned long handle;
+	int ret;
 
 	if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
 	    !drm_core_check_feature(dev, DRIVER_LEGACY))
 		return -EINVAL;
 
-	ctx->handle = drm_legacy_ctxbitmap_next(dev);
-	if (ctx->handle == DRM_KERNEL_CONTEXT) {
+	ret = drm_legacy_ctxbitmap_next(dev, &handle);
+	if (handle == DRM_KERNEL_CONTEXT) {
 		/* Skip kernel's context and get a new one. */
-		ctx->handle = drm_legacy_ctxbitmap_next(dev);
+		ret = drm_legacy_ctxbitmap_next(dev, &handle);
 	}
-	DRM_DEBUG("%d\n", ctx->handle);
-	if (ctx->handle == -1) {
+	ctx->handle = handle;
+	DRM_DEBUG("ret: %d, handle: %u\n", ret, ctx->handle);
+	if (ret) {
 		DRM_DEBUG("Not enough free contexts.\n");
 		/* Should this return -EBUSY instead? */
 		return -ENOMEM;
diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
index d34e509..89e8d16 100644
--- a/drivers/gpu/drm/drm_dp_aux_dev.c
+++ b/drivers/gpu/drm/drm_dp_aux_dev.c
@@ -70,7 +70,8 @@ static struct drm_dp_aux_dev *drm_dp_aux_dev_get_by_minor(unsigned index)
 static struct drm_dp_aux_dev *alloc_drm_dp_aux_dev(struct drm_dp_aux *aux)
 {
 	struct drm_dp_aux_dev *aux_dev;
-	int index;
+	unsigned long index;
+	int ret;
 
 	aux_dev = kzalloc(sizeof(*aux_dev), GFP_KERNEL);
 	if (!aux_dev)
@@ -80,10 +81,10 @@ static struct drm_dp_aux_dev *alloc_drm_dp_aux_dev(struct drm_dp_aux *aux)
 	kref_init(&aux_dev->refcount);
 
 	mutex_lock(&aux_idr_mutex);
-	index = idr_alloc_cyclic(&aux_idr, aux_dev, 0, DRM_AUX_MINORS,
-				 GFP_KERNEL);
+	ret = idr_alloc_cyclic(&aux_idr, aux_dev, &index, 0, DRM_AUX_MINORS,
+			       GFP_KERNEL);
 	mutex_unlock(&aux_idr_mutex);
-	if (index < 0) {
+	if (ret) {
 		kfree(aux_dev);
 		return ERR_PTR(index);
 	}
@@ -245,7 +246,7 @@ static int auxdev_release(struct inode *inode, struct file *file)
 static struct drm_dp_aux_dev *drm_dp_aux_dev_get_by_aux(struct drm_dp_aux *aux)
 {
 	struct drm_dp_aux_dev *iter, *aux_dev = NULL;
-	int id;
+	unsigned long id;
 
 	/* don't increase kref count here because this function should only be
 	 * used by drm_dp_aux_unregister_devnode. Thus, it will always have at
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 37b8ad3..d79b8b7 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -144,6 +144,7 @@ static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
 {
 	struct drm_minor *minor;
 	unsigned long flags;
+	unsigned long idr_index;
 	int r;
 
 	minor = kzalloc(sizeof(*minor), GFP_KERNEL);
@@ -157,16 +158,17 @@ static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
 	spin_lock_irqsave(&drm_minor_lock, flags);
 	r = idr_alloc(&drm_minors_idr,
 		      NULL,
+		      &idr_index,
 		      64 * type,
 		      64 * (type + 1),
 		      GFP_NOWAIT);
 	spin_unlock_irqrestore(&drm_minor_lock, flags);
 	idr_preload_end();
 
-	if (r < 0)
+	if (r)
 		goto err_free;
 
-	minor->index = r;
+	minor->index = idr_index;
 
 	minor->kdev = drm_sysfs_minor_alloc(minor);
 	if (IS_ERR(minor->kdev)) {
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 8dc1106..c618333 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -249,7 +249,7 @@ static void drm_gem_object_exported_dma_buf_free(struct drm_gem_object *obj)
  * handle references on objects.
  */
 static int
-drm_gem_object_release_handle(int id, void *ptr, void *data)
+drm_gem_object_release_handle(unsigned long id, void *ptr, void *data)
 {
 	struct drm_file *file_priv = data;
 	struct drm_gem_object *obj = ptr;
@@ -347,7 +347,7 @@ int drm_gem_dumb_destroy(struct drm_file *file,
 			   u32 *handlep)
 {
 	struct drm_device *dev = obj->dev;
-	u32 handle;
+	unsigned long handle;
 	int ret;
 
 	WARN_ON(!mutex_is_locked(&dev->object_name_lock));
@@ -361,17 +361,16 @@ int drm_gem_dumb_destroy(struct drm_file *file,
 	idr_preload(GFP_KERNEL);
 	spin_lock(&file_priv->table_lock);
 
-	ret = idr_alloc(&file_priv->object_idr, obj, 1, 0, GFP_NOWAIT);
+	ret = idr_alloc(&file_priv->object_idr, obj, &handle, 1, 0,
+			GFP_NOWAIT);
 
 	spin_unlock(&file_priv->table_lock);
 	idr_preload_end();
 
 	mutex_unlock(&dev->object_name_lock);
-	if (ret < 0)
+	if (ret)
 		goto err_unref;
 
-	handle = ret;
-
 	ret = drm_vma_node_allow(&obj->vma_node, file_priv);
 	if (ret)
 		goto err_remove;
@@ -654,6 +653,7 @@ struct drm_gem_object *
 {
 	struct drm_gem_flink *args = data;
 	struct drm_gem_object *obj;
+	unsigned long idr_index;
 	int ret;
 
 	if (!drm_core_check_feature(dev, DRIVER_GEM))
@@ -671,11 +671,12 @@ struct drm_gem_object *
 	}
 
 	if (!obj->name) {
-		ret = idr_alloc(&dev->object_name_idr, obj, 1, 0, GFP_KERNEL);
-		if (ret < 0)
+		ret = idr_alloc(&dev->object_name_idr, obj, &idr_index,
+				1, 0, GFP_KERNEL);
+		if (ret)
 			goto err;
 
-		obj->name = ret;
+		obj->name = idr_index;
 	}
 
 	args->name = (uint64_t) obj->name;
diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index 6b68e90..5bcf144 100644
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -110,7 +110,7 @@ int drm_clients_info(struct seq_file *m, void *data)
 	return 0;
 }
 
-static int drm_gem_one_name_info(int id, void *ptr, void *data)
+static int drm_gem_one_name_info(unsigned long id, void *ptr, void *data)
 {
 	struct drm_gem_object *obj = ptr;
 	struct seq_file *m = data;
diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
index da9a9ad..72f70bc 100644
--- a/drivers/gpu/drm/drm_mode_object.c
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -36,15 +36,18 @@ int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
 			  void (*obj_free_cb)(struct kref *kref))
 {
 	int ret;
+	unsigned long idr_index;
 
 	mutex_lock(&dev->mode_config.idr_mutex);
-	ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
-	if (ret >= 0) {
+	ret = idr_alloc(&dev->mode_config.crtc_idr,
+			register_obj ? obj : NULL, &idr_index, 1, 0,
+			GFP_KERNEL);
+	if (ret == 0) {
 		/*
 		 * Set up the object linking under the protection of the idr
 		 * lock so that other users can't see inconsistent state.
 		 */
-		obj->id = ret;
+		obj->id = idr_index;
 		obj->type = obj_type;
 		if (obj_free_cb) {
 			obj->free_cb = obj_free_cb;
@@ -53,7 +56,7 @@ int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
 	}
 	mutex_unlock(&dev->mode_config.idr_mutex);
 
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 /**
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 789ba0b..f7a0742 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -134,6 +134,7 @@ static int drm_syncobj_create(struct drm_file *file_private,
 			      u32 *handle)
 {
 	int ret;
+	unsigned long idr_index;
 	struct drm_syncobj *syncobj;
 
 	syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL);
@@ -144,17 +145,18 @@ static int drm_syncobj_create(struct drm_file *file_private,
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&file_private->syncobj_table_lock);
-	ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
+	ret = idr_alloc(&file_private->syncobj_idr, syncobj, &idr_index,
+			1, 0, GFP_NOWAIT);
 	spin_unlock(&file_private->syncobj_table_lock);
 
 	idr_preload_end();
 
-	if (ret < 0) {
+	if (ret) {
 		drm_syncobj_put(syncobj);
 		return ret;
 	}
 
-	*handle = ret;
+	*handle = idr_index;
 	return 0;
 }
 
@@ -253,6 +255,7 @@ static int drm_syncobj_fd_to_handle(struct drm_file *file_private,
 				    int fd, u32 *handle)
 {
 	struct drm_syncobj *syncobj = drm_syncobj_fdget(fd);
+	unsigned long idr_index;
 	int ret;
 
 	if (!syncobj)
@@ -263,15 +266,16 @@ static int drm_syncobj_fd_to_handle(struct drm_file *file_private,
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&file_private->syncobj_table_lock);
-	ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
+	ret = idr_alloc(&file_private->syncobj_idr, syncobj, &idr_index,
+			1, 0, GFP_NOWAIT);
 	spin_unlock(&file_private->syncobj_table_lock);
 	idr_preload_end();
 
-	if (ret < 0) {
+	if (ret) {
 		fput(syncobj->file);
 		return ret;
 	}
-	*handle = ret;
+	*handle = idr_index;
 	return 0;
 }
 
@@ -344,7 +348,7 @@ int drm_syncobj_export_sync_file(struct drm_file *file_private,
 }
 
 static int
-drm_syncobj_release_handle(int id, void *ptr, void *data)
+drm_syncobj_release_handle(unsigned long id, void *ptr, void *data)
 {
 	struct drm_syncobj *syncobj = ptr;
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index 3edda18..93c69af 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -117,12 +117,13 @@ int exynos_drm_ippdrv_unregister(struct exynos_drm_ippdrv *ippdrv)
 	return 0;
 }
 
-static int ipp_create_id(struct idr *id_idr, struct mutex *lock, void *obj)
+static int ipp_create_id(struct idr *id_idr, struct mutex *lock, void *obj,
+			 unsigned long *id)
 {
 	int ret;
 
 	mutex_lock(lock);
-	ret = idr_alloc(id_idr, obj, 1, 0, GFP_KERNEL);
+	ret = idr_alloc(id_idr, obj, id, 1, 0, GFP_KERNEL);
 	mutex_unlock(lock);
 
 	return ret;
@@ -326,6 +327,7 @@ int exynos_drm_ipp_set_property(struct drm_device *drm_dev, void *data,
 	struct drm_exynos_ipp_property *property = data;
 	struct exynos_drm_ippdrv *ippdrv;
 	struct drm_exynos_ipp_cmd_node *c_node;
+	unsigned long idr_index;
 	u32 prop_id;
 	int ret, i;
 
@@ -381,12 +383,13 @@ int exynos_drm_ipp_set_property(struct drm_device *drm_dev, void *data,
 	if (!c_node)
 		return -ENOMEM;
 
-	ret = ipp_create_id(&ctx->prop_idr, &ctx->prop_lock, c_node);
-	if (ret < 0) {
+	ret = ipp_create_id(&ctx->prop_idr, &ctx->prop_lock, c_node,
+			    &idr_index);
+	if (ret) {
 		DRM_ERROR("failed to create id.\n");
 		goto err_clear;
 	}
-	property->prop_id = ret;
+	property->prop_id = idr_index;
 
 	DRM_DEBUG_KMS("created prop_id[%d]cmd[%d]ippdrv[%pK]\n",
 		property->prop_id, property->cmd, ippdrv);
@@ -1588,21 +1591,23 @@ static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
 {
 	struct ipp_context *ctx = get_ipp_context(dev);
 	struct exynos_drm_ippdrv *ippdrv;
+	unsigned long idr_index;
 	int ret, count = 0;
 
 	/* get ipp driver entry */
 	list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
 		ippdrv->drm_dev = drm_dev;
 
-		ret = ipp_create_id(&ctx->ipp_idr, &ctx->ipp_lock, ippdrv);
-		if (ret < 0) {
+		ret = ipp_create_id(&ctx->ipp_idr, &ctx->ipp_lock, ippdrv,
+				    &idr_index);
+		if (ret) {
 			DRM_ERROR("failed to create id.\n");
 			goto err;
 		}
-		ippdrv->prop_list.ipp_id = ret;
+		ippdrv->prop_list.ipp_id = idr_index;
 
-		DRM_DEBUG_KMS("count[%d]ippdrv[%pK]ipp_id[%d]\n",
-			count++, ippdrv, ret);
+		DRM_DEBUG_KMS("count[%d]ippdrv[%pK]ipp_id[%ld]\n",
+			      count++, ippdrv, idr_index);
 
 		/* store parent device for node */
 		ippdrv->parent_dev = dev;
diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c
index 7cb0818..ce04352 100644
--- a/drivers/gpu/drm/i915/gvt/display.c
+++ b/drivers/gpu/drm/i915/gvt/display.c
@@ -394,7 +394,7 @@ static void emulate_vblank(struct intel_vgpu *vgpu)
 void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
 {
 	struct intel_vgpu *vgpu;
-	int id;
+	unsigned long id;
 
 	if (WARN_ON(!mutex_is_locked(&gvt->lock)))
 		return;
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index fd0c85f..fb5c87f 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1323,7 +1323,7 @@ static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu, struct kvm *kvm)
 {
 	struct intel_vgpu *itr;
 	struct kvmgt_guest_info *info;
-	int id;
+	unsigned long id;
 	bool ret = false;
 
 	mutex_lock(&vgpu->gvt->lock);
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 90c14e6..719b80c 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -324,6 +324,7 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 		struct intel_vgpu_creation_params *param)
 {
 	struct intel_vgpu *vgpu;
+	unsigned long idr_index;
 	int ret;
 
 	gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n",
@@ -336,12 +337,12 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 
 	mutex_lock(&gvt->lock);
 
-	ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
-		GFP_KERNEL);
-	if (ret < 0)
+	ret = idr_alloc(&gvt->vgpu_idr, vgpu, &idr_index, IDLE_VGPU_IDR + 1,
+			GVT_MAX_VGPU, GFP_KERNEL);
+	if (ret)
 		goto out_free_vgpu;
 
-	vgpu->id = ret;
+	vgpu->id = idr_index;
 	vgpu->handle = param->handle;
 	vgpu->gvt = gvt;
 	vgpu->sched_ctl.weight = param->weight;
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 00d8967..0818eac 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -286,7 +286,7 @@ struct file_stats {
 	u64 active, inactive;
 };
 
-static int per_file_stats(int id, void *ptr, void *data)
+static int per_file_stats(unsigned long id, void *ptr, void *data)
 {
 	struct drm_i915_gem_object *obj = ptr;
 	struct file_stats *stats = data;
@@ -359,7 +359,7 @@ static void print_batch_pool_stats(struct seq_file *m,
 	print_file_stats(m, "[k]batch pool", stats);
 }
 
-static int per_file_ctx_stats(int id, void *ptr, void *data)
+static int per_file_ctx_stats(unsigned long id, void *ptr, void *data)
 {
 	struct i915_gem_context *ctx = ptr;
 	int n;
@@ -2156,7 +2156,7 @@ static int i915_swizzle_info(struct seq_file *m, void *data)
 	return 0;
 }
 
-static int per_file_ctx(int id, void *ptr, void *data)
+static int per_file_ctx(unsigned long id, void *ptr, void *data)
 {
 	struct i915_gem_context *ctx = ptr;
 	struct seq_file *m = data;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 39ed58a..7d601b2 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -252,6 +252,7 @@ static u32 default_desc_template(const struct drm_i915_private *i915,
 		    struct drm_i915_file_private *file_priv)
 {
 	struct i915_gem_context *ctx;
+	unsigned long idr_index;
 	int ret;
 
 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
@@ -283,12 +284,12 @@ static u32 default_desc_template(const struct drm_i915_private *i915,
 	/* Default context will never have a file_priv */
 	ret = DEFAULT_CONTEXT_HANDLE;
 	if (file_priv) {
-		ret = idr_alloc(&file_priv->context_idr, ctx,
+		ret = idr_alloc(&file_priv->context_idr, ctx, &idr_index,
 				DEFAULT_CONTEXT_HANDLE, 0, GFP_KERNEL);
-		if (ret < 0)
+		if (ret)
 			goto err_lut;
 	}
-	ctx->user_handle = ret;
+	ctx->user_handle = idr_index;
 
 	ctx->file_priv = file_priv;
 	if (file_priv) {
@@ -517,7 +518,7 @@ void i915_gem_context_fini(struct drm_i915_private *dev_priv)
 	ida_destroy(&dev_priv->context_hw_ida);
 }
 
-static int context_idr_cleanup(int id, void *p, void *data)
+static int context_idr_cleanup(unsigned long id, void *p, void *data)
 {
 	struct i915_gem_context *ctx = p;
 
diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c
index 74fc936..81cff18 100644
--- a/drivers/gpu/drm/qxl/qxl_cmd.c
+++ b/drivers/gpu/drm/qxl/qxl_cmd.c
@@ -445,18 +445,18 @@ void qxl_io_monitors_config(struct qxl_device *qdev)
 int qxl_surface_id_alloc(struct qxl_device *qdev,
 		      struct qxl_bo *surf)
 {
-	uint32_t handle;
+	unsigned long handle;
 	int idr_ret;
 	int count = 0;
 again:
 	idr_preload(GFP_ATOMIC);
 	spin_lock(&qdev->surf_id_idr_lock);
-	idr_ret = idr_alloc(&qdev->surf_id_idr, NULL, 1, 0, GFP_NOWAIT);
+	idr_ret = idr_alloc(&qdev->surf_id_idr, NULL, &handle, 1, 0,
+			    GFP_NOWAIT);
 	spin_unlock(&qdev->surf_id_idr_lock);
 	idr_preload_end();
-	if (idr_ret < 0)
+	if (idr_ret)
 		return idr_ret;
-	handle = idr_ret;
 
 	if (handle >= qdev->rom->n_surfaces) {
 		count++;
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index e6ec845..c7b2047 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -128,8 +128,9 @@ static long qxl_fence_wait(struct dma_fence *fence, bool intr,
 		  struct qxl_release **ret)
 {
 	struct qxl_release *release;
-	int handle;
 	size_t size = sizeof(*release);
+	unsigned long handle;
+	int idr_ret;
 
 	release = kmalloc(size, GFP_KERNEL);
 	if (!release) {
@@ -144,19 +145,20 @@ static long qxl_fence_wait(struct dma_fence *fence, bool intr,
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&qdev->release_idr_lock);
-	handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);
+	idr_ret = idr_alloc(&qdev->release_idr, release, &handle, 1, 0,
+			    GFP_NOWAIT);
 	release->base.seqno = ++qdev->release_seqno;
 	spin_unlock(&qdev->release_idr_lock);
 	idr_preload_end();
-	if (handle < 0) {
+	if (idr_ret) {
 		kfree(release);
 		*ret = NULL;
-		return handle;
+		return idr_ret;
 	}
 	*ret = release;
-	QXL_INFO(qdev, "allocated release %d\n", handle);
+	QXL_INFO(qdev, "allocated release %lu\n", handle);
 	release->id = handle;
-	return handle;
+	return idr_ret;
 }
 
 static void
diff --git a/drivers/gpu/drm/sis/sis_mm.c b/drivers/gpu/drm/sis/sis_mm.c
index 1622db2..f69a49e 100644
--- a/drivers/gpu/drm/sis/sis_mm.c
+++ b/drivers/gpu/drm/sis/sis_mm.c
@@ -88,6 +88,7 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
 	struct sis_memblock *item;
 	struct sis_file_private *file_priv = file->driver_priv;
 	unsigned long offset;
+	unsigned long idr_index;
 
 	mutex_lock(&dev->struct_mutex);
 
@@ -128,10 +129,11 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
 	if (retval)
 		goto fail_alloc;
 
-	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
-	if (retval < 0)
+	retval = idr_alloc(&dev_priv->object_idr, item, &idr_index, 1, 0,
+			   GFP_KERNEL);
+	if (retval)
 		goto fail_idr;
-	user_key = retval;
+	user_key = idr_index;
 
 	list_add(&item->owner_list, &file_priv->obj_list);
 	mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 518f4b6..290e994 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -644,20 +644,22 @@ static int tegra_client_open(struct tegra_drm_file *fpriv,
 			     struct tegra_drm_client *client,
 			     struct tegra_drm_context *context)
 {
+	unsigned long idr_index;
 	int err;
 
 	err = client->ops->open_channel(client, context);
 	if (err < 0)
 		return err;
 
-	err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
-	if (err < 0) {
+	err = idr_alloc(&fpriv->contexts, context, &idr_index, 1, 0,
+			GFP_KERNEL);
+	if (err) {
 		client->ops->close_channel(context);
 		return err;
 	}
 
 	context->client = client;
-	context->id = err;
+	context->id = idr_index;
 
 	return 0;
 }
@@ -982,7 +984,7 @@ static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 	.llseek = noop_llseek,
 };
 
-static int tegra_drm_context_cleanup(int id, void *p, void *data)
+static int tegra_drm_context_cleanup(unsigned long id, void *p, void *data)
 {
 	struct tegra_drm_context *context = p;
 
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c b/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c
index 623a914..66a4c1a 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c
@@ -204,6 +204,7 @@ static void __init tilcdc_convert_slave_node(void)
 	/* For all memory needed for the overlay tree. This memory can
 	   be freed after the overlay has been applied. */
 	struct kfree_table kft;
+	unsigned long id;
 	int ret;
 
 	if (kfree_table_init(&kft))
@@ -247,7 +248,7 @@ static void __init tilcdc_convert_slave_node(void)
 
 	tilcdc_node_disable(slave);
 
-	ret = of_overlay_create(overlay);
+	ret = of_overlay_create(overlay, &id);
 	if (ret)
 		pr_err("%s: Creating overlay failed: %d\n", __func__, ret);
 	else
diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
index 3109c83..2558118 100644
--- a/drivers/gpu/drm/vgem/vgem_fence.c
+++ b/drivers/gpu/drm/vgem/vgem_fence.c
@@ -158,6 +158,7 @@ int vgem_fence_attach_ioctl(struct drm_device *dev,
 	struct reservation_object *resv;
 	struct drm_gem_object *obj;
 	struct dma_fence *fence;
+	unsigned long idr_index;
 	int ret;
 
 	if (arg->flags & ~VGEM_FENCE_WRITE)
@@ -200,12 +201,11 @@ int vgem_fence_attach_ioctl(struct drm_device *dev,
 	/* Record the fence in our idr for later signaling */
 	if (ret == 0) {
 		mutex_lock(&vfile->fence_mutex);
-		ret = idr_alloc(&vfile->fence_idr, fence, 1, 0, GFP_KERNEL);
+		ret = idr_alloc(&vfile->fence_idr, fence, &idr_index, 1, 0,
+				GFP_KERNEL);
 		mutex_unlock(&vfile->fence_mutex);
-		if (ret > 0) {
-			arg->out_fence = ret;
-			ret = 0;
-		}
+		if (ret == 0)
+			arg->out_fence = idr_index;
 	}
 err_fence:
 	if (ret) {
@@ -269,7 +269,7 @@ int vgem_fence_open(struct vgem_file *vfile)
 	return 0;
 }
 
-static int __vgem_fence_idr_fini(int id, void *p, void *data)
+static int __vgem_fence_idr_fini(unsigned long id, void *p, void *data)
 {
 	dma_fence_signal(p);
 	dma_fence_put(p);
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index 4217d66..4b848b3 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -116,6 +116,7 @@ int via_mem_alloc(struct drm_device *dev, void *data,
 	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 	struct via_file_private *file_priv = file->driver_priv;
 	unsigned long tmpSize;
+	unsigned long idr_index;
 
 	if (mem->type > VIA_MEM_AGP) {
 		DRM_ERROR("Unknown memory type allocation\n");
@@ -148,10 +149,11 @@ int via_mem_alloc(struct drm_device *dev, void *data,
 	if (retval)
 		goto fail_alloc;
 
-	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
-	if (retval < 0)
+	retval = idr_alloc(&dev_priv->object_idr, item, &idr_index, 1, 0,
+			   GFP_KERNEL);
+	if (retval)
 		goto fail_idr;
-	user_key = retval;
+	user_key = idr_index;
 
 	list_add(&item->owner_list, &file_priv->obj_list);
 	mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 6400506..2a251c2 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -55,11 +55,12 @@ static void virtio_gpu_config_changed_work_func(struct work_struct *work)
 static void virtio_gpu_ctx_id_get(struct virtio_gpu_device *vgdev,
 				  uint32_t *resid)
 {
-	int handle;
+	int ret;
+	unsigned long handle;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&vgdev->ctx_id_idr_lock);
-	handle = idr_alloc(&vgdev->ctx_id_idr, NULL, 1, 0, 0);
+	ret = idr_alloc(&vgdev->ctx_id_idr, NULL, &handle, 1, 0, 0);
 	spin_unlock(&vgdev->ctx_id_idr_lock);
 	idr_preload_end();
 	*resid = handle;
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 9eb96fb2..6d08d42 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -41,11 +41,12 @@
 void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
 				uint32_t *resid)
 {
-	int handle;
+	int ret;
+	unsigned long handle;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&vgdev->resource_idr_lock);
-	handle = idr_alloc(&vgdev->resource_idr, NULL, 1, 0, GFP_NOWAIT);
+	ret = idr_alloc(&vgdev->resource_idr, NULL, &handle, 1, 0, GFP_NOWAIT);
 	spin_unlock(&vgdev->resource_idr_lock);
 	idr_preload_end();
 	*resid = handle;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index a96f90f..5bade53 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -160,19 +160,20 @@ int vmw_resource_alloc_id(struct vmw_resource *res)
 	struct vmw_private *dev_priv = res->dev_priv;
 	int ret;
 	struct idr *idr = &dev_priv->res_idr[res->func->res_type];
+	unsigned long idr_index;
 
 	BUG_ON(res->id != -1);
 
 	idr_preload(GFP_KERNEL);
 	write_lock(&dev_priv->resource_lock);
 
-	ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT);
-	if (ret >= 0)
-		res->id = ret;
+	ret = idr_alloc(idr, res, &idr_index, 1, 0, GFP_NOWAIT);
+	if (ret == 0)
+		res->id = idr_index;
 
 	write_unlock(&dev_priv->resource_lock);
 	idr_preload_end();
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 /**
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 12822a4..c867083 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1306,13 +1306,15 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
  */
 static int __i2c_add_numbered_adapter(struct i2c_adapter *adap)
 {
-	int id;
+	unsigned long idr_index;
+	int ret;
 
 	mutex_lock(&core_lock);
-	id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, GFP_KERNEL);
+	ret = idr_alloc(&i2c_adapter_idr, adap, &idr_index,
+			adap->nr, adap->nr + 1, GFP_KERNEL);
 	mutex_unlock(&core_lock);
-	if (WARN(id < 0, "couldn't get idr"))
-		return id == -ENOSPC ? -EBUSY : id;
+	if (WARN(ret, "couldn't get idr"))
+		return ret == -ENOSPC ? -EBUSY : ret;
 
 	return i2c_register_adapter(adap);
 }
@@ -1334,7 +1336,8 @@ static int __i2c_add_numbered_adapter(struct i2c_adapter *adap)
 int i2c_add_adapter(struct i2c_adapter *adapter)
 {
 	struct device *dev = &adapter->dev;
-	int id;
+	unsigned long id;
+	int ret;
 
 	if (dev->of_node) {
 		id = of_alias_get_id(dev->of_node, "i2c");
@@ -1345,11 +1348,11 @@ int i2c_add_adapter(struct i2c_adapter *adapter)
 	}
 
 	mutex_lock(&core_lock);
-	id = idr_alloc(&i2c_adapter_idr, adapter,
+	ret = idr_alloc(&i2c_adapter_idr, adapter, &id,
 		       __i2c_first_dynamic_bus_num, 0, GFP_KERNEL);
 	mutex_unlock(&core_lock);
-	if (WARN(id < 0, "couldn't get idr"))
-		return id;
+	if (WARN(ret, "couldn't get idr"))
+		return ret;
 
 	adapter->nr = id;
 
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 2b4d613..4e7642c 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -493,18 +493,20 @@ static int cm_init_av_by_path(struct sa_path_rec *path, struct cm_av *av,
 static int cm_alloc_id(struct cm_id_private *cm_id_priv)
 {
 	unsigned long flags;
-	int id;
+	unsigned long id;
+	int ret;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_irqsave(&cm.lock, flags);
 
-	id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT);
+	ret = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, &id, 0, 0,
+			       GFP_NOWAIT);
 
 	spin_unlock_irqrestore(&cm.lock, flags);
 	idr_preload_end();
 
 	cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
-	return id < 0 ? id : 0;
+	return ret;
 }
 
 static void cm_free_id(__be32 local_id)
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 0eb3932..258476d 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -216,11 +216,12 @@ struct class_port_info_context {
 };
 
 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
-			struct rdma_bind_list *bind_list, int snum)
+			 struct rdma_bind_list *bind_list, int snum,
+			 unsigned long *port)
 {
 	struct idr *idr = cma_pernet_idr(net, ps);
 
-	return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
+	return idr_alloc(idr, bind_list, port, snum, snum + 1, GFP_KERNEL);
 }
 
 static struct rdma_bind_list *cma_ps_find(struct net *net,
@@ -2977,6 +2978,7 @@ static int cma_alloc_port(enum rdma_port_space ps,
 			  struct rdma_id_private *id_priv, unsigned short snum)
 {
 	struct rdma_bind_list *bind_list;
+	unsigned long port;
 	int ret;
 
 	bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
@@ -2984,12 +2986,12 @@ static int cma_alloc_port(enum rdma_port_space ps,
 		return -ENOMEM;
 
 	ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
-			   snum);
-	if (ret < 0)
+			   snum, &port);
+	if (ret)
 		goto err;
 
 	bind_list->ps = ps;
-	bind_list->port = (unsigned short)ret;
+	bind_list->port = (unsigned short)port;
 	cma_bind_port(bind_list, id_priv);
 	return 0;
 err:
diff --git a/drivers/infiniband/core/rdma_core.c b/drivers/infiniband/core/rdma_core.c
index 41c31a2..63c06b9 100644
--- a/drivers/infiniband/core/rdma_core.c
+++ b/drivers/infiniband/core/rdma_core.c
@@ -102,6 +102,7 @@ static struct ib_uobject *alloc_uobj(struct ib_ucontext *context,
 
 static int idr_add_uobj(struct ib_uobject *uobj)
 {
+	unsigned long idr_index;
 	int ret;
 
 	idr_preload(GFP_KERNEL);
@@ -112,15 +113,15 @@ static int idr_add_uobj(struct ib_uobject *uobj)
 	 * object which isn't initialized yet. We'll replace it later on with
 	 * the real object once we commit.
 	 */
-	ret = idr_alloc(&uobj->context->ufile->idr, NULL, 0,
+	ret = idr_alloc(&uobj->context->ufile->idr, NULL, &idr_index, 0,
 			min_t(unsigned long, U32_MAX - 1, INT_MAX), GFP_NOWAIT);
-	if (ret >= 0)
-		uobj->id = ret;
+	if (ret == 0)
+		uobj->id = idr_index;
 
 	spin_unlock(&uobj->context->ufile->idr_lock);
 	idr_preload_end();
 
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 /*
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 70fa4ca..6b3d469 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -1400,19 +1400,20 @@ static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
 {
 	bool preload = gfpflags_allow_blocking(gfp_mask);
 	unsigned long flags;
-	int ret, id;
+	unsigned long id;
+	int ret;
 
 	if (preload)
 		idr_preload(gfp_mask);
 	spin_lock_irqsave(&idr_lock, flags);
 
-	id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
+	ret = idr_alloc(&query_idr, query, &id, 0, 0, GFP_NOWAIT);
 
 	spin_unlock_irqrestore(&idr_lock, flags);
 	if (preload)
 		idr_preload_end();
-	if (id < 0)
-		return id;
+	if (ret)
+		return ret;
 
 	query->mad_buf->timeout_ms  = timeout_ms;
 	query->mad_buf->context[0] = query;
@@ -1422,7 +1423,7 @@ static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
 	    (!(query->flags & IB_SA_QUERY_OPA))) {
 		if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
 			if (!ib_nl_make_request(query, gfp_mask))
-				return id;
+				return ret;
 		}
 		ib_sa_disable_local_svc(query);
 	}
@@ -1439,7 +1440,7 @@ static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
 	 * send may already have completed and freed the query in
 	 * another context.
 	 */
-	return ret ? ret : id;
+	return ret;
 }
 
 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
@@ -1672,7 +1673,7 @@ int ib_sa_path_rec_get(struct ib_sa_client *client,
 						query->conv_pr : rec;
 
 	ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
-	if (ret < 0)
+	if (ret)
 		goto err3;
 
 	return ret;
@@ -1796,7 +1797,7 @@ int ib_sa_service_rec_query(struct ib_sa_client *client,
 	*sa_query = &query->sa_query;
 
 	ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
-	if (ret < 0)
+	if (ret)
 		goto err2;
 
 	return ret;
@@ -1888,7 +1889,7 @@ int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
 	*sa_query = &query->sa_query;
 
 	ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
-	if (ret < 0)
+	if (ret)
 		goto err2;
 
 	return ret;
@@ -1986,7 +1987,7 @@ int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
 	*sa_query = &query->sa_query;
 
 	ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
-	if (ret < 0)
+	if (ret)
 		goto err2;
 
 	return ret;
@@ -2136,7 +2137,7 @@ static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
 	*sa_query = &query->sa_query;
 
 	ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
-	if (ret < 0)
+	if (ret)
 		goto err_free_mad;
 
 	return ret;
diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 112099c..5b2dd07 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -177,6 +177,8 @@ static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
 static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
 {
 	struct ib_ucm_context *ctx;
+	unsigned long idr_index;
+	int ret;
 
 	ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
 	if (!ctx)
@@ -188,11 +190,12 @@ static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
 	INIT_LIST_HEAD(&ctx->events);
 
 	mutex_lock(&ctx_id_mutex);
-	ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&ctx_id_table, ctx, &idr_index, 0, 0, GFP_KERNEL);
 	mutex_unlock(&ctx_id_mutex);
-	if (ctx->id < 0)
+	if (ret)
 		goto error;
 
+	ctx->id = idr_index;
 	list_add_tail(&ctx->file_list, &file->ctxs);
 	return ctx;
 
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 276f0ef..c66b34fd 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -184,6 +184,8 @@ static void ucma_close_id(struct work_struct *work)
 static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
 {
 	struct ucma_context *ctx;
+	unsigned long idr_index;
+	int ret;
 
 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
@@ -196,11 +198,12 @@ static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
 	ctx->file = file;
 
 	mutex_lock(&mut);
-	ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&ctx_idr, ctx, &idr_index, 0, 0, GFP_KERNEL);
 	mutex_unlock(&mut);
-	if (ctx->id < 0)
+	if (ret)
 		goto error;
 
+	ctx->id = idr_index;
 	list_add_tail(&ctx->list, &file->ctx_list);
 	return ctx;
 
@@ -212,17 +215,20 @@ static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file)
 static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx)
 {
 	struct ucma_multicast *mc;
+	unsigned long idr_index;
+	int ret;
 
 	mc = kzalloc(sizeof(*mc), GFP_KERNEL);
 	if (!mc)
 		return NULL;
 
 	mutex_lock(&mut);
-	mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&multicast_idr, mc, &idr_index, 0, 0, GFP_KERNEL);
 	mutex_unlock(&mut);
-	if (mc->id < 0)
+	if (ret)
 		goto error;
 
+	mc->id = idr_index;
 	mc->ctx = ctx;
 	list_add_tail(&mc->list, &ctx->mc_list);
 	return mc;
diff --git a/drivers/infiniband/hw/cxgb3/iwch.c b/drivers/infiniband/hw/cxgb3/iwch.c
index 47b2ce2..039e3b1 100644
--- a/drivers/infiniband/hw/cxgb3/iwch.c
+++ b/drivers/infiniband/hw/cxgb3/iwch.c
@@ -63,7 +63,7 @@ struct cxgb3_client t3c_client = {
 static LIST_HEAD(dev_list);
 static DEFINE_MUTEX(dev_mutex);
 
-static int disable_qp_db(int id, void *p, void *data)
+static int disable_qp_db(unsigned long id, void *p, void *data)
 {
 	struct iwch_qp *qhp = p;
 
@@ -71,7 +71,7 @@ static int disable_qp_db(int id, void *p, void *data)
 	return 0;
 }
 
-static int enable_qp_db(int id, void *p, void *data)
+static int enable_qp_db(unsigned long id, void *p, void *data)
 {
 	struct iwch_qp *qhp = p;
 
diff --git a/drivers/infiniband/hw/cxgb3/iwch.h b/drivers/infiniband/hw/cxgb3/iwch.h
index 8378622..06efb1d 100644
--- a/drivers/infiniband/hw/cxgb3/iwch.h
+++ b/drivers/infiniband/hw/cxgb3/iwch.h
@@ -157,13 +157,13 @@ static inline int insert_handle(struct iwch_dev *rhp, struct idr *idr,
 	idr_preload(GFP_KERNEL);
 	spin_lock_irq(&rhp->lock);
 
-	ret = idr_alloc(idr, handle, id, id + 1, GFP_NOWAIT);
+	ret = idr_alloc(idr, handle, NULL, id, id + 1, GFP_NOWAIT);
 
 	spin_unlock_irq(&rhp->lock);
 	idr_preload_end();
 
 	BUG_ON(ret == -ENOSPC);
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 static inline void remove_handle(struct iwch_dev *rhp, struct idr *idr, u32 id)
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index ae0b79a..d1bd4cd 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -87,7 +87,7 @@ struct c4iw_debugfs_data {
 	int pos;
 };
 
-static int count_idrs(int id, void *p, void *data)
+static int count_idrs(unsigned long id, void *p, void *data)
 {
 	int *countp = data;
 
@@ -260,7 +260,7 @@ static void set_ep_sin6_addrs(struct c4iw_ep *ep,
 	}
 }
 
-static int dump_qp(int id, void *p, void *data)
+static int dump_qp(unsigned long id, void *p, void *data)
 {
 	struct c4iw_qp *qp = p;
 	struct c4iw_debugfs_data *qpd = data;
@@ -382,7 +382,7 @@ static int qp_open(struct inode *inode, struct file *file)
 	.llseek  = default_llseek,
 };
 
-static int dump_stag(int id, void *p, void *data)
+static int dump_stag(unsigned long id, void *p, void *data)
 {
 	struct c4iw_debugfs_data *stagd = data;
 	int space;
@@ -562,7 +562,7 @@ static ssize_t stats_clear(struct file *file, const char __user *buf,
 	.write   = stats_clear,
 };
 
-static int dump_ep(int id, void *p, void *data)
+static int dump_ep(unsigned long id, void *p, void *data)
 {
 	struct c4iw_ep *ep = p;
 	struct c4iw_debugfs_data *epd = data;
@@ -621,7 +621,7 @@ static int dump_ep(int id, void *p, void *data)
 	return 0;
 }
 
-static int dump_listen_ep(int id, void *p, void *data)
+static int dump_listen_ep(unsigned long id, void *p, void *data)
 {
 	struct c4iw_listen_ep *ep = p;
 	struct c4iw_debugfs_data *epd = data;
@@ -1254,7 +1254,7 @@ static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
 	return 0;
 }
 
-static int disable_qp_db(int id, void *p, void *data)
+static int disable_qp_db(unsigned long id, void *p, void *data)
 {
 	struct c4iw_qp *qp = p;
 
@@ -1276,7 +1276,7 @@ static void stop_queues(struct uld_ctx *ctx)
 	spin_unlock_irqrestore(&ctx->dev->lock, flags);
 }
 
-static int enable_qp_db(int id, void *p, void *data)
+static int enable_qp_db(unsigned long id, void *p, void *data)
 {
 	struct c4iw_qp *qp = p;
 
@@ -1356,7 +1356,7 @@ struct qp_list {
 	struct c4iw_qp **qps;
 };
 
-static int add_and_ref_qp(int id, void *p, void *data)
+static int add_and_ref_qp(unsigned long id, void *p, void *data)
 {
 	struct qp_list *qp_listp = data;
 	struct c4iw_qp *qp = p;
@@ -1366,7 +1366,7 @@ static int add_and_ref_qp(int id, void *p, void *data)
 	return 0;
 }
 
-static int count_qps(int id, void *p, void *data)
+static int count_qps(unsigned long id, void *p, void *data)
 {
 	unsigned *countp = data;
 	(*countp)++;
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
index 819a306..2e65b95 100644
--- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
+++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
@@ -303,7 +303,7 @@ static inline int _insert_handle(struct c4iw_dev *rhp, struct idr *idr,
 		spin_lock_irq(&rhp->lock);
 	}
 
-	ret = idr_alloc(idr, handle, id, id + 1, GFP_ATOMIC);
+	ret = idr_alloc(idr, handle, NULL, id, id + 1, GFP_ATOMIC);
 
 	if (lock) {
 		spin_unlock_irq(&rhp->lock);
@@ -311,7 +311,7 @@ static inline int _insert_handle(struct c4iw_dev *rhp, struct idr *idr,
 	}
 
 	BUG_ON(ret == -ENOSPC);
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 static inline int insert_handle(struct c4iw_dev *rhp, struct idr *idr,
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 4a11d4d..30c97b2 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1042,6 +1042,7 @@ struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra)
 	unsigned long flags;
 	struct hfi1_devdata *dd;
 	int ret, nports;
+	unsigned long idr_index;
 
 	/* extra is * number of ports */
 	nports = extra / sizeof(struct hfi1_pportdata);
@@ -1057,16 +1058,16 @@ struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra)
 	idr_preload(GFP_KERNEL);
 	spin_lock_irqsave(&hfi1_devs_lock, flags);
 
-	ret = idr_alloc(&hfi1_unit_table, dd, 0, 0, GFP_NOWAIT);
-	if (ret >= 0) {
-		dd->unit = ret;
+	ret = idr_alloc(&hfi1_unit_table, dd, &idr_index, 0, 0, GFP_NOWAIT);
+	if (ret == 0) {
+		dd->unit = idr_index;
 		list_add(&dd->list, &hfi1_dev_list);
 	}
 
 	spin_unlock_irqrestore(&hfi1_devs_lock, flags);
 	idr_preload_end();
 
-	if (ret < 0) {
+	if (ret) {
 		hfi1_early_err(&pdev->dev,
 			       "Could not allocate unit ID: error %d\n", -ret);
 		goto bail;
diff --git a/drivers/infiniband/hw/hfi1/vnic_main.c b/drivers/infiniband/hw/hfi1/vnic_main.c
index 339f0cd..3b4addc 100644
--- a/drivers/infiniband/hw/hfi1/vnic_main.c
+++ b/drivers/infiniband/hw/hfi1/vnic_main.c
@@ -593,7 +593,7 @@ void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet)
 		 */
 		if (unlikely(!vinfo)) {
 			struct hfi1_vnic_vport_info *vinfo_tmp;
-			int id_tmp = 0;
+			unsigned long id_tmp = 0;
 
 			vinfo_tmp =  idr_get_next(&dd->vnic.vesw_idr, &id_tmp);
 			if (vinfo_tmp) {
@@ -649,9 +649,9 @@ static int hfi1_vnic_up(struct hfi1_vnic_vport_info *vinfo)
 	if (!vinfo->vesw_id)
 		return -EINVAL;
 
-	rc = idr_alloc(&dd->vnic.vesw_idr, vinfo, vinfo->vesw_id,
+	rc = idr_alloc(&dd->vnic.vesw_idr, vinfo, NULL, vinfo->vesw_id,
 		       vinfo->vesw_id + 1, GFP_NOWAIT);
-	if (rc < 0)
+	if (rc)
 		return rc;
 
 	for (i = 0; i < vinfo->num_rx_q; i++) {
diff --git a/drivers/infiniband/hw/mlx4/cm.c b/drivers/infiniband/hw/mlx4/cm.c
index fedaf82..c99e5c8 100644
--- a/drivers/infiniband/hw/mlx4/cm.c
+++ b/drivers/infiniband/hw/mlx4/cm.c
@@ -245,6 +245,7 @@ static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new)
 	int ret;
 	struct id_map_entry *ent;
 	struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
+	unsigned long idr_index;
 
 	ent = kmalloc(sizeof (struct id_map_entry), GFP_KERNEL);
 	if (!ent)
@@ -259,9 +260,10 @@ static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new)
 	idr_preload(GFP_KERNEL);
 	spin_lock(&to_mdev(ibdev)->sriov.id_map_lock);
 
-	ret = idr_alloc_cyclic(&sriov->pv_id_table, ent, 0, 0, GFP_NOWAIT);
-	if (ret >= 0) {
-		ent->pv_cm_id = (u32)ret;
+	ret = idr_alloc_cyclic(&sriov->pv_id_table, ent, &idr_index, 0, 0,
+			       GFP_NOWAIT);
+	if (ret == 0) {
+		ent->pv_cm_id = (u32)idr_index;
 		sl_id_map_add(ibdev, ent);
 		list_add_tail(&ent->list, &sriov->cm_list);
 	}
@@ -269,12 +271,13 @@ static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new)
 	spin_unlock(&sriov->id_map_lock);
 	idr_preload_end();
 
-	if (ret >= 0)
+	if (ret == 0)
 		return ent;
 
 	/*error flow*/
 	kfree(ent);
-	mlx4_ib_warn(ibdev, "No more space in the idr (err:0x%x)\n", ret);
+	mlx4_ib_warn(ibdev, "No more space in the idr (err:0x%lx)\n",
+		     idr_index);
 	return ERR_PTR(-ENOMEM);
 }
 
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
index 57c9a2a..5224c99 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -302,6 +302,8 @@ static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 	int status = 0, i;
 	u8 lstate = 0;
 	struct ocrdma_dev *dev;
+	unsigned long idr_index;
+	int ret;
 
 	dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 	if (!dev) {
@@ -313,9 +315,10 @@ static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 		goto idr_err;
 
 	memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
-	dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
-	if (dev->id < 0)
+	ret = idr_alloc(&ocrdma_dev_id, NULL, &idr_index, 0, 0, GFP_KERNEL);
+	if (ret)
 		goto idr_err;
+	dev->id = idr_index;
 
 	status = ocrdma_init_hw(dev);
 	if (status)
diff --git a/drivers/infiniband/hw/qib/qib_init.c b/drivers/infiniband/hw/qib/qib_init.c
index 6c16ba1..3bbe99f 100644
--- a/drivers/infiniband/hw/qib/qib_init.c
+++ b/drivers/infiniband/hw/qib/qib_init.c
@@ -1099,6 +1099,7 @@ struct qib_devdata *qib_alloc_devdata(struct pci_dev *pdev, size_t extra)
 	unsigned long flags;
 	struct qib_devdata *dd;
 	int ret, nports;
+	unsigned long idr_index;
 
 	/* extra is * number of ports */
 	nports = extra / sizeof(struct qib_pportdata);
@@ -1112,16 +1113,16 @@ struct qib_devdata *qib_alloc_devdata(struct pci_dev *pdev, size_t extra)
 	idr_preload(GFP_KERNEL);
 	spin_lock_irqsave(&qib_devs_lock, flags);
 
-	ret = idr_alloc(&qib_unit_table, dd, 0, 0, GFP_NOWAIT);
-	if (ret >= 0) {
-		dd->unit = ret;
+	ret = idr_alloc(&qib_unit_table, dd, &idr_index, 0, 0, GFP_NOWAIT);
+	if (ret == 0) {
+		dd->unit = idr_index;
 		list_add(&dd->list, &qib_dev_list);
 	}
 
 	spin_unlock_irqrestore(&qib_devs_lock, flags);
 	idr_preload_end();
 
-	if (ret < 0) {
+	if (ret) {
 		qib_early_err(&pdev->dev,
 			      "Could not allocate unit ID: error %d\n", -ret);
 		goto bail;
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c b/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
index cf768dd..b220e91 100644
--- a/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
@@ -204,9 +204,9 @@ static struct opa_vnic_adapter *vema_add_vport(struct opa_vnic_vema_port *port,
 		int rc;
 
 		adapter->cport = cport;
-		rc = idr_alloc(&port->vport_idr, adapter, vport_num,
+		rc = idr_alloc(&port->vport_idr, adapter, NULL, vport_num,
 			       vport_num + 1, GFP_NOWAIT);
-		if (rc < 0) {
+		if (rc) {
 			opa_vnic_rem_netdev(adapter);
 			adapter = ERR_PTR(rc);
 		}
@@ -850,7 +850,7 @@ void opa_vnic_vema_send_trap(struct opa_vnic_adapter *adapter,
 	v_err("Aborting trap\n");
 }
 
-static int vema_rem_vport(int id, void *p, void *data)
+static int vema_rem_vport(unsigned long id, void *p, void *data)
 {
 	struct opa_vnic_adapter *adapter = p;
 
@@ -858,7 +858,7 @@ static int vema_rem_vport(int id, void *p, void *data)
 	return 0;
 }
 
-static int vema_enable_vport(int id, void *p, void *data)
+static int vema_enable_vport(unsigned long id, void *p, void *data)
 {
 	struct opa_vnic_adapter *adapter = p;
 
@@ -866,7 +866,7 @@ static int vema_enable_vport(int id, void *p, void *data)
 	return 0;
 }
 
-static int vema_disable_vport(int id, void *p, void *data)
+static int vema_disable_vport(unsigned long id, void *p, void *data)
 {
 	struct opa_vnic_adapter *adapter = p;
 
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index f167c0d..bf30a25 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -299,6 +299,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
 	struct mm_struct *mm = NULL;
 	int pasid_max;
 	int ret;
+	unsigned long idr_index;
 
 	if (WARN_ON(!iommu))
 		return -EINVAL;
@@ -320,7 +321,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
 
 	mutex_lock(&pasid_mutex);
 	if (pasid && !(flags & SVM_FLAG_PRIVATE_PASID)) {
-		int i;
+		unsigned long i;
 
 		idr_for_each_entry(&iommu->pasid_idr, svm, i) {
 			if (svm->mm != mm ||
@@ -382,14 +383,14 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
 			pasid_max = iommu->pasid_max;
 
 		/* Do not use PASID 0 in caching mode (virtualised IOMMU) */
-		ret = idr_alloc(&iommu->pasid_idr, svm,
+		ret = idr_alloc(&iommu->pasid_idr, svm, &idr_index,
 				!!cap_caching_mode(iommu->cap),
 				pasid_max - 1, GFP_KERNEL);
-		if (ret < 0) {
+		if (ret) {
 			kfree(svm);
 			goto out;
 		}
-		svm->pasid = ret;
+		svm->pasid = idr_index;
 		svm->notifier.ops = &intel_mmuops;
 		svm->mm = mm;
 		svm->flags = flags;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 2edbcc2..974884c 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1607,11 +1607,12 @@ static int specific_minor(int minor)
 	idr_preload(GFP_KERNEL);
 	spin_lock(&_minor_lock);
 
-	r = idr_alloc(&_minor_idr, MINOR_ALLOCED, minor, minor + 1, GFP_NOWAIT);
+	r = idr_alloc(&_minor_idr, MINOR_ALLOCED, NULL, minor, minor + 1,
+		      GFP_NOWAIT);
 
 	spin_unlock(&_minor_lock);
 	idr_preload_end();
-	if (r < 0)
+	if (r)
 		return r == -ENOSPC ? -EBUSY : r;
 	return 0;
 }
@@ -1619,17 +1620,19 @@ static int specific_minor(int minor)
 static int next_free_minor(int *minor)
 {
 	int r;
+	unsigned long idr_index;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&_minor_lock);
 
-	r = idr_alloc(&_minor_idr, MINOR_ALLOCED, 0, 1 << MINORBITS, GFP_NOWAIT);
+	r = idr_alloc(&_minor_idr, MINOR_ALLOCED, &idr_index,
+		      0, 1 << MINORBITS, GFP_NOWAIT);
 
 	spin_unlock(&_minor_lock);
 	idr_preload_end();
-	if (r < 0)
+	if (r)
 		return r;
-	*minor = r;
+	*minor = idr_index;
 	return 0;
 }
 
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index 76382c8..266ef03 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -511,17 +511,19 @@ struct memstick_host *memstick_alloc_host(unsigned int extra,
 int memstick_add_host(struct memstick_host *host)
 {
 	int rc;
+	unsigned long idr_index;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&memstick_host_lock);
 
-	rc = idr_alloc(&memstick_host_idr, host, 0, 0, GFP_NOWAIT);
-	if (rc >= 0)
-		host->id = rc;
+	rc = idr_alloc(&memstick_host_idr, host, &idr_index, 0, 0,
+		       GFP_NOWAIT);
+	if (rc == 0)
+		host->id = idr_index;
 
 	spin_unlock(&memstick_host_lock);
 	idr_preload_end();
-	if (rc < 0)
+	if (rc)
 		return rc;
 
 	dev_set_name(&host->dev, "memstick%u", host->id);
diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index 22de7f5..b1f33f2 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -2099,16 +2099,19 @@ static int msb_init_disk(struct memstick_dev *card)
 	int rc;
 	u64 limit = BLK_BOUNCE_HIGH;
 	unsigned long capacity;
+	unsigned long idr_index;
 
 	if (host->dev.dma_mask && *(host->dev.dma_mask))
 		limit = *(host->dev.dma_mask);
 
 	mutex_lock(&msb_disk_lock);
-	msb->disk_id = idr_alloc(&msb_disk_idr, card, 0, 256, GFP_KERNEL);
+	rc = idr_alloc(&msb_disk_idr, card, &idr_index, 0, 256, GFP_KERNEL);
 	mutex_unlock(&msb_disk_lock);
 
-	if (msb->disk_id  < 0)
-		return msb->disk_id;
+	if (rc)
+		return rc;
+
+	msb->disk_id = idr_index;
 
 	msb->disk = alloc_disk(0);
 	if (!msb->disk) {
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 8897962..51204ae 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -1177,6 +1177,8 @@ static int mspro_block_init_disk(struct memstick_dev *card)
 	int rc, disk_id;
 	u64 limit = BLK_BOUNCE_HIGH;
 	unsigned long capacity;
+	unsigned long idr_index;
+	int ret;
 
 	if (host->dev.dma_mask && *(host->dev.dma_mask))
 		limit = *(host->dev.dma_mask);
@@ -1200,10 +1202,14 @@ static int mspro_block_init_disk(struct memstick_dev *card)
 	msb->page_size = be16_to_cpu(sys_info->unit_size);
 
 	mutex_lock(&mspro_block_disk_lock);
-	disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
+	ret = idr_alloc(&mspro_block_disk_idr, card, &idr_index, 0, 256,
+			GFP_KERNEL);
 	mutex_unlock(&mspro_block_disk_lock);
-	if (disk_id < 0)
-		return disk_id;
+
+	if (ret)
+		return ret;
+
+	disk_id = idr_index;
 
 	msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
 	if (!msb->disk) {
diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index a0ac89d..ef44cf0 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -1172,6 +1172,7 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
 	struct pcr_handle *handle;
 	u32 base, len;
 	int ret, i, bar = 0;
+	unsigned long idr_index;
 
 	dev_dbg(&(pcidev->dev),
 		": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
@@ -1205,12 +1206,12 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&rtsx_pci_lock);
-	ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
-	if (ret >= 0)
-		pcr->id = ret;
+	ret = idr_alloc(&rtsx_pci_idr, pcr, &idr_index, 0, 0, GFP_NOWAIT);
+	if (ret == 0)
+		pcr->id = idr_index;
 	spin_unlock(&rtsx_pci_lock);
 	idr_preload_end();
-	if (ret < 0)
+	if (ret)
 		goto free_handle;
 
 	pcr->pci = pcidev;
diff --git a/drivers/misc/c2port/core.c b/drivers/misc/c2port/core.c
index 1922cb8..f21cd35 100644
--- a/drivers/misc/c2port/core.c
+++ b/drivers/misc/c2port/core.c
@@ -896,6 +896,7 @@ struct c2port_device *c2port_device_register(char *name,
 					struct c2port_ops *ops, void *devdata)
 {
 	struct c2port_device *c2dev;
+	unsigned long idr_index;
 	int ret;
 
 	if (unlikely(!ops) || unlikely(!ops->access) || \
@@ -910,13 +911,13 @@ struct c2port_device *c2port_device_register(char *name,
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_irq(&c2port_idr_lock);
-	ret = idr_alloc(&c2port_idr, c2dev, 0, 0, GFP_NOWAIT);
+	ret = idr_alloc(&c2port_idr, c2dev, &idr_index, 0, 0, GFP_NOWAIT);
 	spin_unlock_irq(&c2port_idr_lock);
 	idr_preload_end();
 
-	if (ret < 0)
+	if (ret)
 		goto error_idr_alloc;
-	c2dev->id = ret;
+	c2dev->id = idr_index;
 
 	bin_attr_flash_data.size = ops->blocks_num * ops->block_size;
 
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 8c32040..cf32e3b 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -38,6 +38,7 @@ struct cxl_context *cxl_context_alloc(void)
 int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master)
 {
 	int i;
+	unsigned long idr_index;
 
 	ctx->afu = afu;
 	ctx->master = master;
@@ -93,14 +94,15 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master)
 	 */
 	mutex_lock(&afu->contexts_lock);
 	idr_preload(GFP_KERNEL);
-	i = idr_alloc(&ctx->afu->contexts_idr, ctx, ctx->afu->adapter->min_pe,
+	i = idr_alloc(&ctx->afu->contexts_idr, ctx, &idr_index,
+		      ctx->afu->adapter->min_pe,
 		      ctx->afu->num_procs, GFP_NOWAIT);
 	idr_preload_end();
 	mutex_unlock(&afu->contexts_lock);
-	if (i < 0)
+	if (i)
 		return i;
 
-	ctx->pe = i;
+	ctx->pe = idr_index;
 	if (cpu_has_feature(CPU_FTR_HVMODE)) {
 		ctx->elem = &ctx->afu->native->spa[i];
 		ctx->external_pe = ctx->pe;
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index c1ba0d4..cb2f9a9 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -80,7 +80,8 @@ static inline void cxl_slbia_core(struct mm_struct *mm)
 	struct cxl *adapter;
 	struct cxl_afu *afu;
 	struct cxl_context *ctx;
-	int card, slice, id;
+	int slice;
+	unsigned long card, id;
 
 	pr_devel("%s called\n", __func__);
 
@@ -202,17 +203,19 @@ struct cxl *get_cxl_adapter(int num)
 
 static int cxl_alloc_adapter_nr(struct cxl *adapter)
 {
-	int i;
+	int ret;
+	unsigned long idr_index;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&adapter_idr_lock);
-	i = idr_alloc(&cxl_adapter_idr, adapter, 0, 0, GFP_NOWAIT);
+	ret = idr_alloc(&cxl_adapter_idr, adapter, &idr_index, 0, 0,
+		      GFP_NOWAIT);
 	spin_unlock(&adapter_idr_lock);
 	idr_preload_end();
-	if (i < 0)
-		return i;
+	if (ret)
+		return ret;
 
-	adapter->adapter_num = i;
+	adapter->adapter_num = idr_index;
 
 	return 0;
 }
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index e825f01..7c8c39f 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -792,11 +792,13 @@ static ssize_t hbm_ver_drv_show(struct device *device,
 static int mei_minor_get(struct mei_device *dev)
 {
 	int ret;
+	unsigned long idr_index;
 
 	mutex_lock(&mei_minor_lock);
-	ret = idr_alloc(&mei_idr, dev, 0, MEI_MAX_DEVS, GFP_KERNEL);
-	if (ret >= 0)
-		dev->minor = ret;
+	ret = idr_alloc(&mei_idr, dev, &idr_index, 0, MEI_MAX_DEVS,
+			GFP_KERNEL);
+	if (ret == 0)
+		dev->minor = idr_index;
 	else if (ret == -ENOSPC)
 		dev_err(dev->dev, "too many mei devices\n");
 
diff --git a/drivers/misc/mic/scif/scif_api.c b/drivers/misc/mic/scif/scif_api.c
index ddc9e4b..d07cb6c 100644
--- a/drivers/misc/mic/scif/scif_api.c
+++ b/drivers/misc/mic/scif/scif_api.c
@@ -336,6 +336,7 @@ int __scif_flush(scif_epd_t epd)
 int scif_bind(scif_epd_t epd, u16 pn)
 {
 	struct scif_endpt *ep = (struct scif_endpt *)epd;
+	unsigned long port;
 	int ret = 0;
 	int tmp;
 
@@ -364,14 +365,14 @@ int scif_bind(scif_epd_t epd, u16 pn)
 	}
 
 	if (pn) {
-		tmp = scif_rsrv_port(pn);
-		if (tmp != pn) {
+		tmp = scif_rsrv_port(pn, &port);
+		if (port != pn) {
 			ret = -EINVAL;
 			goto scif_bind_exit;
 		}
 	} else {
-		pn = scif_get_new_port();
-		if (!pn) {
+		pn = scif_get_new_port(&port);
+		if (pn < 0) {
 			ret = -ENOSPC;
 			goto scif_bind_exit;
 		}
@@ -379,7 +380,7 @@ int scif_bind(scif_epd_t epd, u16 pn)
 
 	ep->state = SCIFEP_BOUND;
 	ep->port.node = scif_info.nodeid;
-	ep->port.port = pn;
+	ep->port.port = port;
 	ep->conn_async_state = ASYNC_CONN_IDLE;
 	ret = pn;
 	dev_dbg(scif_info.mdev.this_device,
diff --git a/drivers/misc/mic/scif/scif_ports.c b/drivers/misc/mic/scif/scif_ports.c
index 594e18d..8a1938f 100644
--- a/drivers/misc/mic/scif/scif_ports.c
+++ b/drivers/misc/mic/scif/scif_ports.c
@@ -41,19 +41,19 @@ struct scif_port {
  * @return : Allocated SCIF port #, or -ENOSPC if port unavailable.
  *		On memory allocation failure, returns -ENOMEM.
  */
-static int __scif_get_port(int start, int end)
+static int __scif_get_port(unsigned long index, int start, int end)
 {
-	int id;
+	int ret;
 	struct scif_port *port = kzalloc(sizeof(*port), GFP_ATOMIC);
 
 	if (!port)
 		return -ENOMEM;
 	spin_lock(&scif_info.port_lock);
-	id = idr_alloc(&scif_ports, port, start, end, GFP_ATOMIC);
-	if (id >= 0)
+	ret = idr_alloc(&scif_ports, port, &index, start, end, GFP_ATOMIC);
+	if (ret == 0)
 		port->ref_cnt++;
 	spin_unlock(&scif_info.port_lock);
-	return id;
+	return ret;
 }
 
 /**
@@ -63,9 +63,9 @@ static int __scif_get_port(int start, int end)
  * @return : Allocated SCIF port #, or -ENOSPC if port unavailable.
  *		On memory allocation failure, returns -ENOMEM.
  */
-int scif_rsrv_port(u16 port)
+int scif_rsrv_port(u16 port, unsigned long *index)
 {
-	return __scif_get_port(port, port + 1);
+	return __scif_get_port(index, port, port + 1);
 }
 
 /**
@@ -75,9 +75,9 @@ int scif_rsrv_port(u16 port)
  * @return : Allocated SCIF port #, or -ENOSPC if no ports available.
  *		On memory allocation failure, returns -ENOMEM.
  */
-int scif_get_new_port(void)
+int scif_get_new_port(unsigned long *index)
 {
-	return __scif_get_port(SCIF_PORT_RSVD + 1, SCIF_PORT_COUNT);
+	return __scif_get_port(index, SCIF_PORT_RSVD + 1, SCIF_PORT_COUNT);
 }
 
 /**
diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index a511b2a..d4b0777 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -197,15 +197,16 @@ struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
 int tifm_add_adapter(struct tifm_adapter *fm)
 {
 	int rc;
+	unsigned long idr_index;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&tifm_adapter_lock);
-	rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
-	if (rc >= 0)
-		fm->id = rc;
+	rc = idr_alloc(&tifm_adapter_idr, fm, &idr_index, 0, 0, GFP_NOWAIT);
+	if (rc == 0)
+		fm->id = idr_index;
 	spin_unlock(&tifm_adapter_lock);
 	idr_preload_end();
-	if (rc < 0)
+	if (rc)
 		return rc;
 
 	dev_set_name(&fm->dev, "tifm%u", fm->id);
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 956382c..da2d6a4 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -85,7 +85,7 @@ static int mtd_cls_resume(struct device *dev)
 DEFINE_MUTEX(mtd_table_mutex);
 EXPORT_SYMBOL_GPL(mtd_table_mutex);
 
-struct mtd_info *__mtd_next_device(int i)
+struct mtd_info *__mtd_next_device(unsigned long i)
 {
 	return idr_get_next(&mtd_idr, &i);
 }
@@ -489,6 +489,7 @@ int mtd_pairing_groups(struct mtd_info *mtd)
 int add_mtd_device(struct mtd_info *mtd)
 {
 	struct mtd_notifier *not;
+	unsigned long idr_index;
 	int i, error;
 
 	/*
@@ -502,13 +503,13 @@ int add_mtd_device(struct mtd_info *mtd)
 	BUG_ON(mtd->writesize == 0);
 	mutex_lock(&mtd_table_mutex);
 
-	i = idr_alloc(&mtd_idr, mtd, 0, 0, GFP_KERNEL);
-	if (i < 0) {
+	i = idr_alloc(&mtd_idr, mtd, &idr_index, 0, 0, GFP_KERNEL);
+	if (i) {
 		error = i;
 		goto fail_locked;
 	}
 
-	mtd->index = i;
+	mtd->index = idr_index;
 	mtd->usecount = 0;
 
 	/* default value if not set by driver */
diff --git a/drivers/mtd/mtdcore.h b/drivers/mtd/mtdcore.h
index 55fdb8e..28c5674 100644
--- a/drivers/mtd/mtdcore.h
+++ b/drivers/mtd/mtdcore.h
@@ -5,7 +5,7 @@
 
 extern struct mutex mtd_table_mutex;
 
-struct mtd_info *__mtd_next_device(int i);
+struct mtd_info *__mtd_next_device(unsigned long i);
 int add_mtd_device(struct mtd_info *mtd);
 int del_mtd_device(struct mtd_info *mtd);
 int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index c3963f8..96be456 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -358,6 +358,7 @@ int ubiblock_create(struct ubi_volume_info *vi)
 	struct ubiblock *dev;
 	struct gendisk *gd;
 	u64 disk_capacity = vi->used_bytes >> 9;
+	unsigned long idr_index;
 	int ret;
 
 	if ((sector_t)disk_capacity != disk_capacity)
@@ -390,13 +391,15 @@ int ubiblock_create(struct ubi_volume_info *vi)
 
 	gd->fops = &ubiblock_ops;
 	gd->major = ubiblock_major;
-	gd->first_minor = idr_alloc(&ubiblock_minor_idr, dev, 0, 0, GFP_KERNEL);
-	if (gd->first_minor < 0) {
+	ret = idr_alloc(&ubiblock_minor_idr, dev, &idr_index,
+			0, 0, GFP_KERNEL);
+	if (ret) {
 		dev_err(disk_to_dev(gd),
 			"block: dynamic minor allocation failed");
 		ret = -ENODEV;
 		goto out_put_disk;
 	}
+	gd->first_minor = idr_index;
 	gd->private_data = dev;
 	sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
 	set_capacity(gd, disk_capacity);
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index a404552..b982238 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -286,7 +286,7 @@ static void ppp_receive_mp_frame(struct ppp *ppp, struct sk_buff *skb,
 static int ppp_connect_channel(struct channel *pch, int unit);
 static int ppp_disconnect_channel(struct channel *pch);
 static void ppp_destroy_channel(struct channel *pch);
-static int unit_get(struct idr *p, void *ptr);
+static int unit_get(struct idr *p, void *ptr, unsigned long *index);
 static int unit_set(struct idr *p, void *ptr, int n);
 static void unit_put(struct idr *p, int n);
 static void *unit_find(struct idr *p, int n);
@@ -943,7 +943,7 @@ static __net_exit void ppp_exit_net(struct net *net)
 	struct net_device *aux;
 	struct ppp *ppp;
 	LIST_HEAD(list);
-	int id;
+	unsigned long id;
 
 	rtnl_lock();
 	for_each_netdev_safe(net, dev, aux) {
@@ -972,13 +972,14 @@ static __net_exit void ppp_exit_net(struct net *net)
 static int ppp_unit_register(struct ppp *ppp, int unit, bool ifname_is_set)
 {
 	struct ppp_net *pn = ppp_pernet(ppp->ppp_net);
+	unsigned long idr_index;
 	int ret;
 
 	mutex_lock(&pn->all_ppp_mutex);
 
 	if (unit < 0) {
-		ret = unit_get(&pn->units_idr, ppp);
-		if (ret < 0)
+		ret = unit_get(&pn->units_idr, ppp, &idr_index);
+		if (ret)
 			goto err;
 	} else {
 		/* Caller asked for a specific unit number. Fail with -EEXIST
@@ -991,13 +992,13 @@ static int ppp_unit_register(struct ppp *ppp, int unit, bool ifname_is_set)
 			goto err;
 		}
 		ret = unit_set(&pn->units_idr, ppp, unit);
-		if (ret < 0) {
+		if (ret) {
 			/* Rewrite error for backward compatibility */
 			ret = -EEXIST;
 			goto err;
 		}
 	}
-	ppp->file.index = ret;
+	ppp->file.index = idr_index;
 
 	if (!ifname_is_set)
 		snprintf(ppp->dev->name, IFNAMSIZ, "ppp%i", ppp->file.index);
@@ -3222,18 +3223,18 @@ static void __exit ppp_cleanup(void)
 /* associate pointer with specified number */
 static int unit_set(struct idr *p, void *ptr, int n)
 {
-	int unit;
+	int ret;
 
-	unit = idr_alloc(p, ptr, n, n + 1, GFP_KERNEL);
-	if (unit == -ENOSPC)
-		unit = -EINVAL;
-	return unit;
+	ret = idr_alloc(p, ptr, NULL, n, n + 1, GFP_KERNEL);
+	if (ret == -ENOSPC)
+		ret = -EINVAL;
+	return ret;
 }
 
 /* get new free unit number and associate pointer with it */
-static int unit_get(struct idr *p, void *ptr)
+static int unit_get(struct idr *p, void *ptr, unsigned long *index)
 {
-	return idr_alloc(p, ptr, 0, 0, GFP_KERNEL);
+	return idr_alloc(p, ptr, index, 0, 0, GFP_KERNEL);
 }
 
 /* put unit number back to a pool */
diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 0d03941..7b306ab 100644
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -408,6 +408,7 @@ int tap_get_minor(dev_t major, struct tap_dev *tap)
 {
 	int retval = -ENOMEM;
 	struct major_info *tap_major;
+	unsigned long idr_index;
 
 	rcu_read_lock();
 	tap_major = tap_get_major(MAJOR(major));
@@ -417,9 +418,10 @@ int tap_get_minor(dev_t major, struct tap_dev *tap)
 	}
 
 	spin_lock(&tap_major->minor_lock);
-	retval = idr_alloc(&tap_major->minor_idr, tap, 1, TAP_NUM_DEVS, GFP_ATOMIC);
-	if (retval >= 0) {
-		tap->minor = retval;
+	retval = idr_alloc(&tap_major->minor_idr, tap, &idr_index,
+			   1, TAP_NUM_DEVS, GFP_ATOMIC);
+	if (retval == 0) {
+		tap->minor = idr_index;
 	} else if (retval == -ENOSPC) {
 		netdev_err(tap->dev, "Too many tap devices\n");
 		retval = -EINVAL;
@@ -428,7 +430,7 @@ int tap_get_minor(dev_t major, struct tap_dev *tap)
 
 unlock:
 	rcu_read_unlock();
-	return retval < 0 ? retval : 0;
+	return retval;
 }
 EXPORT_SYMBOL_GPL(tap_get_minor);
 
diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
index 6305308..dddb9ed 100644
--- a/drivers/net/wireless/ath/ath10k/htt.h
+++ b/drivers/net/wireless/ath/ath10k/htt.h
@@ -1826,7 +1826,8 @@ void ath10k_htt_tx_txq_recalc(struct ieee80211_hw *hw,
 int ath10k_htt_tx_mgmt_inc_pending(struct ath10k_htt *htt, bool is_mgmt,
 				   bool is_presp);
 
-int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt, struct sk_buff *skb);
+int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt, struct sk_buff *skb,
+				unsigned long *index);
 void ath10k_htt_tx_free_msdu_id(struct ath10k_htt *htt, u16 msdu_id);
 int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu);
 int ath10k_htt_tx(struct ath10k_htt *htt,
diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index 685faac..ab7e458 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -203,14 +203,15 @@ void ath10k_htt_tx_mgmt_dec_pending(struct ath10k_htt *htt)
 	htt->num_pending_mgmt_tx--;
 }
 
-int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt, struct sk_buff *skb)
+int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt, struct sk_buff *skb,
+				unsigned long *index)
 {
 	struct ath10k *ar = htt->ar;
 	int ret;
 
 	lockdep_assert_held(&htt->tx_lock);
 
-	ret = idr_alloc(&htt->pending_tx, skb, 0,
+	ret = idr_alloc(&htt->pending_tx, skb, index, 0,
 			htt->max_num_pending_tx, GFP_ATOMIC);
 
 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx alloc msdu_id %d\n", ret);
@@ -423,7 +424,8 @@ int ath10k_htt_tx_start(struct ath10k_htt *htt)
 	return ret;
 }
 
-static int ath10k_htt_tx_clean_up_pending(int msdu_id, void *skb, void *ctx)
+static int ath10k_htt_tx_clean_up_pending(unsigned long msdu_id, void *skb,
+					  void *ctx)
 {
 	struct ath10k *ar = ctx;
 	struct ath10k_htt *htt = &ar->htt;
@@ -832,17 +834,18 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
 	int msdu_id = -1;
 	int res;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data;
+	unsigned long idr_index;
 
 	len += sizeof(cmd->hdr);
 	len += sizeof(cmd->mgmt_tx);
 
 	spin_lock_bh(&htt->tx_lock);
-	res = ath10k_htt_tx_alloc_msdu_id(htt, msdu);
+	res = ath10k_htt_tx_alloc_msdu_id(htt, msdu, &idr_index);
 	spin_unlock_bh(&htt->tx_lock);
-	if (res < 0)
+	if (res)
 		goto err;
 
-	msdu_id = res;
+	msdu_id = idr_index;
 
 	if ((ieee80211_is_action(hdr->frame_control) ||
 	     ieee80211_is_deauth(hdr->frame_control) ||
@@ -917,14 +920,15 @@ int ath10k_htt_tx(struct ath10k_htt *htt, enum ath10k_hw_txrx_mode txmode,
 	u32 frags_paddr = 0;
 	u32 txbuf_paddr;
 	struct htt_msdu_ext_desc *ext_desc = NULL;
+	unsigned long idr_index;
 
 	spin_lock_bh(&htt->tx_lock);
-	res = ath10k_htt_tx_alloc_msdu_id(htt, msdu);
+	res = ath10k_htt_tx_alloc_msdu_id(htt, msdu, &idr_index);
 	spin_unlock_bh(&htt->tx_lock);
-	if (res < 0)
+	if (res)
 		goto err;
 
-	msdu_id = res;
+	msdu_id = idr_index;
 
 	prefetch_len = min(htt->prefetch_len, msdu->len);
 	prefetch_len = roundup(prefetch_len, 4);
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 55c808f..9d70725 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3828,7 +3828,7 @@ static void ath10k_mac_txq_unref(struct ath10k *ar, struct ieee80211_txq *txq)
 	struct ath10k_txq *artxq;
 	struct ath10k_skb_cb *cb;
 	struct sk_buff *msdu;
-	int msdu_id;
+	unsigned long msdu_id;
 
 	if (!txq)
 		return;
diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index d67d700..f5151dd 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -820,23 +820,24 @@ struct sk_buff *
 {
 	struct sk_buff *orig_skb = skb;
 	struct mwifiex_txinfo *tx_info, *orig_tx_info;
+	unsigned long idr_index;
 
 	skb = skb_clone(skb, GFP_ATOMIC);
 	if (skb) {
 		unsigned long flags;
-		int id;
+		int ret;
 
 		spin_lock_irqsave(&priv->ack_status_lock, flags);
-		id = idr_alloc(&priv->ack_status_frames, orig_skb,
-			       1, 0x10, GFP_ATOMIC);
+		ret = idr_alloc(&priv->ack_status_frames, orig_skb, &idr_index,
+				1, 0x10, GFP_ATOMIC);
 		spin_unlock_irqrestore(&priv->ack_status_lock, flags);
 
-		if (id >= 0) {
+		if (ret == 0) {
 			tx_info = MWIFIEX_SKB_TXCB(skb);
-			tx_info->ack_frame_id = id;
+			tx_info->ack_frame_id = idr_index;
 			tx_info->flags |= flag;
 			orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
-			orig_tx_info->ack_frame_id = id;
+			orig_tx_info->ack_frame_id = idr_index;
 			orig_tx_info->flags |= flag;
 
 			if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
diff --git a/drivers/net/wireless/marvell/mwifiex/wmm.c b/drivers/net/wireless/marvell/mwifiex/wmm.c
index 0edd268..d4ad66b 100644
--- a/drivers/net/wireless/marvell/mwifiex/wmm.c
+++ b/drivers/net/wireless/marvell/mwifiex/wmm.c
@@ -562,7 +562,7 @@ static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 	}
 }
 
-static int mwifiex_free_ack_frame(int id, void *p, void *data)
+static int mwifiex_free_ack_frame(unsigned long id, void *p, void *data)
 {
 	pr_warn("Have pending ack frames!\n");
 	kfree_skb(p);
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index c0e4ee1..e5cfe01 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -373,10 +373,11 @@ static int of_free_overlay_info(struct of_overlay *ov)
  *
  * Returns the id of the created overlay, or a negative error number
  */
-int of_overlay_create(struct device_node *tree)
+int of_overlay_create(struct device_node *tree, unsigned long *id)
 {
 	struct of_overlay *ov;
-	int err, id;
+	unsigned long idr_index;
+	int err;
 
 	/* allocate the overlay structure */
 	ov = kzalloc(sizeof(*ov), GFP_KERNEL);
@@ -390,12 +391,10 @@ int of_overlay_create(struct device_node *tree)
 
 	mutex_lock(&of_mutex);
 
-	id = idr_alloc(&ov_idr, ov, 0, 0, GFP_KERNEL);
-	if (id < 0) {
-		err = id;
+	err = idr_alloc(&ov_idr, ov, &idr_index, 0, 0, GFP_KERNEL);
+	if (err)
 		goto err_destroy_trans;
-	}
-	ov->id = id;
+	ov->id = idr_index;
 
 	/* build the overlay info structures */
 	err = of_build_overlay_info(ov, tree);
@@ -430,7 +429,7 @@ int of_overlay_create(struct device_node *tree)
 
 	mutex_unlock(&of_mutex);
 
-	return id;
+	return err;
 
 err_revert_overlay:
 err_abort_trans:
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 0107fc6..ac7cc76 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1242,7 +1242,8 @@ static int of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
 		int *overlay_id)
 {
 	struct device_node *np = NULL;
-	int ret, id = -1;
+	unsigned long id = -1;
+	int ret;
 
 	np = of_find_node_by_path(overlay_path(overlay_nr));
 	if (np == NULL) {
@@ -1252,17 +1253,14 @@ static int of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
 		goto out;
 	}
 
-	ret = of_overlay_create(np);
-	if (ret < 0) {
+	ret = of_overlay_create(np, &id);
+	if (ret) {
 		unittest(0, "could not create overlay from \"%s\"\n",
 				overlay_path(overlay_nr));
 		goto out;
 	}
-	id = ret;
 	of_unittest_track_overlay(id);
 
-	ret = 0;
-
 out:
 	of_node_put(np);
 
@@ -1442,6 +1440,7 @@ static void of_unittest_overlay_6(void)
 	int ret, i, ov_id[2];
 	int overlay_nr = 6, unittest_nr = 6;
 	int before = 0, after = 1;
+	unsigned long id;
 
 	/* unittest device must be in before state */
 	for (i = 0; i < 2; i++) {
@@ -1466,13 +1465,13 @@ static void of_unittest_overlay_6(void)
 			return;
 		}
 
-		ret = of_overlay_create(np);
-		if (ret < 0)  {
+		ret = of_overlay_create(np, &id);
+		if (ret)  {
 			unittest(0, "could not create overlay from \"%s\"\n",
 					overlay_path(overlay_nr + i));
 			return;
 		}
-		ov_id[i] = ret;
+		ov_id[i] = id;
 		of_unittest_track_overlay(ov_id[i]);
 	}
 
@@ -2094,6 +2093,7 @@ static int __init overlay_data_add(int onum)
 	int ret;
 	u32 size;
 	u32 size_from_header;
+	unsigned long id;
 
 	for (k = 0, info = overlays; info; info++, k++) {
 		if (k == onum)
@@ -2138,13 +2138,12 @@ static int __init overlay_data_add(int onum)
 		goto out_free_np_overlay;
 	}
 
-	ret = of_overlay_create(info->np_overlay);
-	if (ret < 0) {
+	ret = of_overlay_create(info->np_overlay, &id);
+	if (ret) {
 		pr_err("of_overlay_create() (ret=%d), %d\n", ret, onum);
 		goto out_free_np_overlay;
 	} else {
-		info->overlay_id = ret;
-		ret = 0;
+		info->overlay_id = id;
 	}
 
 	pr_debug("__dtb_overlay_begin applied, overlay id %d\n", ret);
diff --git a/drivers/power/supply/bq2415x_charger.c b/drivers/power/supply/bq2415x_charger.c
index c4770a9..268f099 100644
--- a/drivers/power/supply/bq2415x_charger.c
+++ b/drivers/power/supply/bq2415x_charger.c
@@ -1542,7 +1542,6 @@ static int bq2415x_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
 	int ret;
-	int num;
 	char *name = NULL;
 	struct bq2415x_device *bq;
 	struct device_node *np = client->dev.of_node;
@@ -1550,6 +1549,7 @@ static int bq2415x_probe(struct i2c_client *client,
 	const struct acpi_device_id *acpi_id = NULL;
 	struct power_supply *notify_psy = NULL;
 	union power_supply_propval prop;
+	unsigned long idr_index;
 
 	if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
 		dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
@@ -1558,13 +1558,13 @@ static int bq2415x_probe(struct i2c_client *client,
 
 	/* Get new ID for the new device */
 	mutex_lock(&bq2415x_id_mutex);
-	num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&bq2415x_id, client, &idr_index, 0, 0, GFP_KERNEL);
 	mutex_unlock(&bq2415x_id_mutex);
-	if (num < 0)
-		return num;
+	if (ret)
+		return ret;
 
 	if (id) {
-		name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
+		name = kasprintf(GFP_KERNEL, "%s-%d", id->name, idr_index);
 	} else if (ACPI_HANDLE(&client->dev)) {
 		acpi_id =
 			acpi_match_device(client->dev.driver->acpi_match_table,
@@ -1574,7 +1574,7 @@ static int bq2415x_probe(struct i2c_client *client,
 			ret = -ENODEV;
 			goto error_1;
 		}
-		name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
+		name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, idr_index);
 	}
 	if (!name) {
 		dev_err(&client->dev, "failed to allocate device name\n");
@@ -1590,7 +1590,7 @@ static int bq2415x_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, bq);
 
-	bq->id = num;
+	bq->id = idr_index;
 	bq->dev = &client->dev;
 	if (id)
 		bq->chip = id->driver_data;
@@ -1714,7 +1714,7 @@ static int bq2415x_probe(struct i2c_client *client,
 	kfree(name);
 error_1:
 	mutex_lock(&bq2415x_id_mutex);
-	idr_remove(&bq2415x_id, num);
+	idr_remove(&bq2415x_id, idr_index);
 	mutex_unlock(&bq2415x_id_mutex);
 
 	return ret;
diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
index a597221..6517416 100644
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -148,18 +148,19 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
 				     const struct i2c_device_id *id)
 {
 	struct bq27xxx_device_info *di;
+	unsigned long idr_index;
 	int ret;
 	char *name;
-	int num;
 
 	/* Get new ID for the new battery device */
 	mutex_lock(&battery_mutex);
-	num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&battery_id, client, &idr_index, 0, 0, GFP_KERNEL);
 	mutex_unlock(&battery_mutex);
-	if (num < 0)
-		return num;
+	if (ret)
+		return ret;
 
-	name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
+	name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name,
+			      idr_index);
 	if (!name)
 		goto err_mem;
 
@@ -167,7 +168,7 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
 	if (!di)
 		goto err_mem;
 
-	di->id = num;
+	di->id = idr_index;
 	di->dev = &client->dev;
 	di->chip = id->driver_data;
 	di->name = name;
@@ -206,7 +207,7 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
 
 err_failed:
 	mutex_lock(&battery_mutex);
-	idr_remove(&battery_id, num);
+	idr_remove(&battery_id, idr_index);
 	mutex_unlock(&battery_mutex);
 
 	return ret;
diff --git a/drivers/power/supply/ds2782_battery.c b/drivers/power/supply/ds2782_battery.c
index a1b7e05..19bf20b 100644
--- a/drivers/power/supply/ds2782_battery.c
+++ b/drivers/power/supply/ds2782_battery.c
@@ -380,6 +380,7 @@ static int ds278x_battery_probe(struct i2c_client *client,
 	struct ds278x_platform_data *pdata = client->dev.platform_data;
 	struct power_supply_config psy_cfg = {};
 	struct ds278x_info *info;
+	unsigned long idr_index;
 	int ret;
 	int num;
 
@@ -394,11 +395,11 @@ static int ds278x_battery_probe(struct i2c_client *client,
 
 	/* Get an ID for this battery */
 	mutex_lock(&battery_lock);
-	ret = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&battery_id, client, &idr_index, 0, 0, GFP_KERNEL);
 	mutex_unlock(&battery_lock);
-	if (ret < 0)
+	if (ret)
 		goto fail_id;
-	num = ret;
+	num = idr_index;
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (!info) {
@@ -446,7 +447,7 @@ static int ds278x_battery_probe(struct i2c_client *client,
 	kfree(info);
 fail_info:
 	mutex_lock(&battery_lock);
-	idr_remove(&battery_id, num);
+	idr_remove(&battery_id, idr_index);
 	mutex_unlock(&battery_lock);
 fail_id:
 	return ret;
diff --git a/drivers/powercap/powercap_sys.c b/drivers/powercap/powercap_sys.c
index 5b10b50..52a8493 100644
--- a/drivers/powercap/powercap_sys.c
+++ b/drivers/powercap/powercap_sys.c
@@ -502,6 +502,7 @@ struct powercap_zone *powercap_register_zone(
 {
 	int result;
 	int nr_attrs;
+	unsigned long idr_index;
 
 	if (!name || !control_type || !ops ||
 			nr_constraints > MAX_CONSTRAINTS_PER_ZONE ||
@@ -532,11 +533,12 @@ struct powercap_zone *powercap_register_zone(
 
 	mutex_lock(&control_type->lock);
 	/* Using idr to get the unique id */
-	result = idr_alloc(power_zone->parent_idr, NULL, 0, 0, GFP_KERNEL);
-	if (result < 0)
+	result = idr_alloc(power_zone->parent_idr, NULL, &idr_index, 0, 0,
+			   GFP_KERNEL);
+	if (result)
 		goto err_idr_alloc;
 
-	power_zone->id = result;
+	power_zone->id = idr_index;
 	idr_init(&power_zone->idr);
 	result = -ENOMEM;
 	power_zone->name = kstrdup(name, GFP_KERNEL);
diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
index 6eb0db3..cd167d2 100644
--- a/drivers/pps/pps.c
+++ b/drivers/pps/pps.c
@@ -354,14 +354,16 @@ int pps_register_cdev(struct pps_device *pps)
 {
 	int err;
 	dev_t devt;
+	unsigned long idr_index;
 
 	mutex_lock(&pps_idr_lock);
 	/*
 	 * Get new ID for the new PPS source.  After idr_alloc() calling
 	 * the new source will be freely available into the kernel.
 	 */
-	err = idr_alloc(&pps_idr, pps, 0, PPS_MAX_SOURCES, GFP_KERNEL);
-	if (err < 0) {
+	err = idr_alloc(&pps_idr, pps, &idr_index, 0, PPS_MAX_SOURCES,
+			GFP_KERNEL);
+	if (err) {
 		if (err == -ENOSPC) {
 			pr_err("%s: too many PPS sources in the system\n",
 			       pps->info.name);
@@ -369,7 +371,7 @@ int pps_register_cdev(struct pps_device *pps)
 		}
 		goto out_unlock;
 	}
-	pps->id = err;
+	pps->id = idr_index;
 	mutex_unlock(&pps_idr_lock);
 
 	devt = MKDEV(MAJOR(pps_devt), pps->id);
@@ -437,7 +439,7 @@ void pps_unregister_cdev(struct pps_device *pps)
 struct pps_device *pps_lookup_dev(void const *cookie)
 {
 	struct pps_device *pps;
-	unsigned id;
+	unsigned long id;
 
 	rcu_read_lock();
 	idr_for_each_entry(&pps_idr, pps, id)
diff --git a/drivers/rapidio/rio_cm.c b/drivers/rapidio/rio_cm.c
index bad0e0e..70310e9 100644
--- a/drivers/rapidio/rio_cm.c
+++ b/drivers/rapidio/rio_cm.c
@@ -1287,7 +1287,8 @@ static int riocm_ch_bind(u16 ch_id, u8 mport_id, void *context)
  */
 static struct rio_channel *riocm_ch_alloc(u16 ch_num)
 {
-	int id;
+	int ret;
+	unsigned long id;
 	int start, end;
 	struct rio_channel *ch;
 
@@ -1307,13 +1308,13 @@ static struct rio_channel *riocm_ch_alloc(u16 ch_num)
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_bh(&idr_lock);
-	id = idr_alloc_cyclic(&ch_idr, ch, start, end, GFP_NOWAIT);
+	ret = idr_alloc_cyclic(&ch_idr, ch, &id, start, end, GFP_NOWAIT);
 	spin_unlock_bh(&idr_lock);
 	idr_preload_end();
 
-	if (id < 0) {
+	if (ret) {
 		kfree(ch);
-		return ERR_PTR(id == -ENOSPC ? -EBUSY : id);
+		return ERR_PTR(id == -ENOSPC ? -EBUSY : ret);
 	}
 
 	ch->id = (u16)id;
@@ -1501,7 +1502,7 @@ static int riocm_cdev_open(struct inode *inode, struct file *filp)
 static int riocm_cdev_release(struct inode *inode, struct file *filp)
 {
 	struct rio_channel *ch, *_c;
-	unsigned int i;
+	unsigned long i;
 	LIST_HEAD(list);
 
 	riocm_debug(EXIT, "by %s(%d) filp=%p",
@@ -1998,7 +1999,7 @@ static void riocm_remove_dev(struct device *dev, struct subsys_interface *sif)
 	struct cm_dev *cm;
 	struct cm_peer *peer;
 	struct rio_channel *ch, *_c;
-	unsigned int i;
+	unsigned long i;
 	bool found = false;
 	LIST_HEAD(list);
 
@@ -2179,7 +2180,7 @@ static void riocm_remove_mport(struct device *dev,
 	struct cm_dev *cm;
 	struct cm_peer *peer, *temp;
 	struct rio_channel *ch, *_c;
-	unsigned int i;
+	unsigned long i;
 	bool found = false;
 	LIST_HEAD(list);
 
@@ -2241,7 +2242,7 @@ static int rio_cm_shutdown(struct notifier_block *nb, unsigned long code,
 	void *unused)
 {
 	struct rio_channel *ch;
-	unsigned int i;
+	unsigned long i;
 	LIST_HEAD(list);
 
 	riocm_debug(EXIT, ".");
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 564061d..63f2110 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -209,6 +209,7 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
 	dma_addr_t dma;
 	void *va;
 	int ret, size, notifyid;
+	unsigned long idr_index;
 
 	/* actual size of vring (in bytes) */
 	size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
@@ -228,13 +229,14 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
 	 * TODO: assign a notifyid for rvdev updates as well
 	 * TODO: support predefined notifyids (via resource table)
 	 */
-	ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL);
-	if (ret < 0) {
+	ret = idr_alloc(&rproc->notifyids, rvring, &idr_index, 0, 0,
+			GFP_KERNEL);
+	if (ret) {
 		dev_err(dev, "idr_alloc failed: %d\n", ret);
 		dma_free_coherent(dev->parent, size, va, dma);
 		return ret;
 	}
-	notifyid = ret;
+	notifyid = idr_index;
 
 	/* Potentially bump max_notifyid */
 	if (notifyid > rproc->max_notifyid)
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index eee2a9f..0074aec 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -221,6 +221,7 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
 	int id_min, id_max, id;
 	struct rpmsg_endpoint *ept;
 	struct device *dev = rpdev ? &rpdev->dev : &vrp->vdev->dev;
+	unsigned long idr_index;
 
 	ept = kzalloc(sizeof(*ept), GFP_KERNEL);
 	if (!ept)
@@ -246,12 +247,13 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
 	mutex_lock(&vrp->endpoints_lock);
 
 	/* bind the endpoint to an rpmsg address (and allocate one if needed) */
-	id = idr_alloc(&vrp->endpoints, ept, id_min, id_max, GFP_KERNEL);
-	if (id < 0) {
+	id = idr_alloc(&vrp->endpoints, ept, &idr_index, id_min, id_max,
+		       GFP_KERNEL);
+	if (id) {
 		dev_err(dev, "idr_alloc failed: %d\n", id);
 		goto free_ept;
 	}
-	ept->addr = id;
+	ept->addr = idr_index;
 
 	mutex_unlock(&vrp->endpoints_lock);
 
diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c
index 7eb0eef..80b4aa8 100644
--- a/drivers/scsi/bfa/bfad_im.c
+++ b/drivers/scsi/bfa/bfad_im.c
@@ -554,15 +554,17 @@ static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
 			struct device *dev)
 {
 	int error = 1;
+	unsigned long idr_index;
 
 	mutex_lock(&bfad_mutex);
-	error = idr_alloc(&bfad_im_port_index, im_port, 0, 0, GFP_KERNEL);
-	if (error < 0) {
+	error = idr_alloc(&bfad_im_port_index, im_port, &idr_index, 0, 0,
+			GFP_KERNEL);
+	if (error) {
 		mutex_unlock(&bfad_mutex);
 		printk(KERN_WARNING "idr_alloc failure\n");
 		goto out;
 	}
-	im_port->idr_id = error;
+	im_port->idr_id = idr_index;
 	mutex_unlock(&bfad_mutex);
 
 	im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index dad959f..b155c9b 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -901,6 +901,7 @@ static int ch_probe(struct device *dev)
 	struct device *class_dev;
 	int ret;
 	scsi_changer *ch;
+	unsigned long idr_index;
 
 	if (sd->type != TYPE_MEDIUM_CHANGER)
 		return -ENODEV;
@@ -911,17 +912,18 @@ static int ch_probe(struct device *dev)
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&ch_index_lock);
-	ret = idr_alloc(&ch_index_idr, ch, 0, CH_MAX_DEVS + 1, GFP_NOWAIT);
+	ret = idr_alloc(&ch_index_idr, ch, &idr_index, 0, CH_MAX_DEVS + 1,
+			GFP_NOWAIT);
 	spin_unlock(&ch_index_lock);
 	idr_preload_end();
 
-	if (ret < 0) {
+	if (ret) {
 		if (ret == -ENOSPC)
 			ret = -ENODEV;
 		goto free_ch;
 	}
 
-	ch->minor = ret;
+	ch->minor = idr_index;
 	sprintf(ch->name,"ch%d",ch->minor);
 
 	class_dev = device_create(ch_sysfs_class, dev,
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index da669dc..b0d0307 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -410,7 +410,7 @@ void *lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int flags,
 int  lpfc_vport_disable(struct fc_vport *fc_vport, bool disable);
 int lpfc_mbx_unreg_vpi(struct lpfc_vport *);
 void destroy_port(struct lpfc_vport *);
-int lpfc_get_instance(void);
+int lpfc_get_instance(unsigned long *index);
 void lpfc_host_attrib_init(struct Scsi_Host *);
 
 extern void lpfc_debugfs_initialize(struct lpfc_vport *);
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 491aa95..7e4bdad 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -3980,11 +3980,11 @@ struct lpfc_vport *
  *   -1 - lpfc get instance failed.
  **/
 int
-lpfc_get_instance(void)
+lpfc_get_instance(unsigned long *index)
 {
 	int ret;
 
-	ret = idr_alloc(&lpfc_hba_index, NULL, 0, 0, GFP_KERNEL);
+	ret = idr_alloc(&lpfc_hba_index, NULL, index, 0, 0, GFP_KERNEL);
 	return ret < 0 ? -1 : ret;
 }
 
@@ -6756,6 +6756,8 @@ struct lpfc_rpi_hdr *
 lpfc_hba_alloc(struct pci_dev *pdev)
 {
 	struct lpfc_hba *phba;
+	unsigned long idr_index;
+	int ret;
 
 	/* Allocate memory for HBA structure */
 	phba = kzalloc(sizeof(struct lpfc_hba), GFP_KERNEL);
@@ -6768,8 +6770,9 @@ struct lpfc_rpi_hdr *
 	phba->pcidev = pdev;
 
 	/* Assign an unused board number */
-	phba->brd_no = lpfc_get_instance();
-	if (phba->brd_no < 0) {
+	ret = lpfc_get_instance(&idr_index);
+	phba->brd_no = idr_index;
+	if (ret) {
 		kfree(phba);
 		return NULL;
 	}
diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
index c714482..a5968bd 100644
--- a/drivers/scsi/lpfc/lpfc_vport.c
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -299,10 +299,11 @@ static void lpfc_discovery_wait(struct lpfc_vport *vport)
 	struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 	struct lpfc_hba   *phba = pport->phba;
 	struct lpfc_vport *vport = NULL;
-	int instance;
+	int ret;
 	int vpi;
 	int rc = VPORT_ERROR;
 	int status;
+	unsigned long idr_index;
 
 	if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
@@ -324,7 +325,8 @@ static void lpfc_discovery_wait(struct lpfc_vport *vport)
 	}
 
 	/* Assign an unused board number */
-	if ((instance = lpfc_get_instance()) < 0) {
+	ret = lpfc_get_instance(&idr_index);
+	if (ret) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 				"1810 Create VPORT failed: Cannot get "
 				"instance number\n");
@@ -333,7 +335,7 @@ static void lpfc_discovery_wait(struct lpfc_vport *vport)
 		goto error_out;
 	}
 
-	vport = lpfc_create_port(phba, instance, &fc_vport->dev);
+	vport = lpfc_create_port(phba, idr_index, &fc_vport->dev);
 	if (!vport) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 				"1811 Create VPORT failed: vpi x%x\n", vpi);
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index d7ff71e..82b71b7 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1402,6 +1402,7 @@ static long sg_compat_ioctl(struct file *filp, unsigned int cmd_in, unsigned lon
 	unsigned long iflags;
 	int error;
 	u32 k;
+	unsigned long idr_index;
 
 	sdp = kzalloc(sizeof(Sg_device), GFP_KERNEL);
 	if (!sdp) {
@@ -1413,8 +1414,9 @@ static long sg_compat_ioctl(struct file *filp, unsigned int cmd_in, unsigned lon
 	idr_preload(GFP_KERNEL);
 	write_lock_irqsave(&sg_index_lock, iflags);
 
-	error = idr_alloc(&sg_index_idr, sdp, 0, SG_MAX_DEVS, GFP_NOWAIT);
-	if (error < 0) {
+	error = idr_alloc(&sg_index_idr, sdp, &idr_index, 0, SG_MAX_DEVS,
+			  GFP_NOWAIT);
+	if (error) {
 		if (error == -ENOSPC) {
 			sdev_printk(KERN_WARNING, scsidp,
 				    "Unable to attach sg device type=%d, minor number exceeds %d\n",
@@ -1427,7 +1429,7 @@ static long sg_compat_ioctl(struct file *filp, unsigned int cmd_in, unsigned lon
 		}
 		goto out_unlock;
 	}
-	k = error;
+	k = idr_index;
 
 	SCSI_LOG_TIMEOUT(3, sdev_printk(KERN_INFO, scsidp,
 					"sg_alloc: dev=%d \n", k));
@@ -2206,7 +2208,7 @@ static long sg_compat_ioctl(struct file *filp, unsigned int cmd_in, unsigned lon
 
 #ifdef CONFIG_SCSI_PROC_FS
 static int
-sg_idr_max_id(int id, void *p, void *data)
+sg_idr_max_id(unsigned long id, void *p, void *data)
 {
 	int *k = data;
 
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 8e5013d..f5a3db8 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -4261,6 +4261,7 @@ static int st_probe(struct device *dev)
 	struct st_buffer *buffer;
 	int i, error;
 	char *stp;
+	unsigned long idr_index;
 
 	if (SDp->type != TYPE_TAPE)
 		return -ENODEV;
@@ -4372,14 +4373,15 @@ static int st_probe(struct device *dev)
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&st_index_lock);
-	error = idr_alloc(&st_index_idr, tpnt, 0, ST_MAX_TAPES + 1, GFP_NOWAIT);
+	error = idr_alloc(&st_index_idr, tpnt, &idr_index,
+			  0, ST_MAX_TAPES + 1, GFP_NOWAIT);
 	spin_unlock(&st_index_lock);
 	idr_preload_end();
-	if (error < 0) {
+	if (error) {
 		pr_warn("st: idr allocation failed: %d\n", error);
 		goto out_put_queue;
 	}
-	tpnt->index = error;
+	tpnt->index = idr_index;
 	sprintf(disk->disk_name, "st%d", tpnt->index);
 	tpnt->stats = kzalloc(sizeof(struct scsi_tape_stats), GFP_KERNEL);
 	if (tpnt->stats == NULL) {
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index c6d01b8..1c81446 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -371,14 +371,16 @@ static struct gb_tty *get_gb_by_minor(unsigned int minor)
 
 static int alloc_minor(struct gb_tty *gb_tty)
 {
-	int minor;
+	int ret;
+	unsigned long idr_index;
 
 	mutex_lock(&table_lock);
-	minor = idr_alloc(&tty_minors, gb_tty, 0, GB_NUM_MINORS, GFP_KERNEL);
+	ret = idr_alloc(&tty_minors, gb_tty, &idr_index, 0, GB_NUM_MINORS,
+			GFP_KERNEL);
 	mutex_unlock(&table_lock);
-	if (minor >= 0)
-		gb_tty->minor = minor;
-	return minor;
+	if (ret == 0)
+		gb_tty->minor = idr_index;
+	return ret;
 }
 
 static void release_minor(struct gb_tty *gb_tty)
@@ -835,7 +837,6 @@ static int gb_uart_probe(struct gbphy_device *gbphy_dev,
 	struct gb_tty *gb_tty;
 	struct device *tty_dev;
 	int retval;
-	int minor;
 
 	gb_tty = kzalloc(sizeof(*gb_tty), GFP_KERNEL);
 	if (!gb_tty)
@@ -874,19 +875,16 @@ static int gb_uart_probe(struct gbphy_device *gbphy_dev,
 	gb_tty->credits = GB_UART_FIRMWARE_CREDITS;
 	init_completion(&gb_tty->credits_complete);
 
-	minor = alloc_minor(gb_tty);
-	if (minor < 0) {
-		if (minor == -ENOSPC) {
+	retval = alloc_minor(gb_tty);
+	if (retval) {
+		if (ret == -ENOSPC) {
 			dev_err(&gbphy_dev->dev,
 				"no more free minor numbers\n");
 			retval = -ENODEV;
-		} else {
-			retval = minor;
 		}
 		goto exit_kfifo_free;
 	}
 
-	gb_tty->minor = minor;
 	spin_lock_init(&gb_tty->write_lock);
 	spin_lock_init(&gb_tty->read_lock);
 	init_waitqueue_head(&gb_tty->wioctl);
diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c b/drivers/staging/unisys/visorhba/visorhba_main.c
index a6e7a6b..9d246f7 100644
--- a/drivers/staging/unisys/visorhba/visorhba_main.c
+++ b/drivers/staging/unisys/visorhba/visorhba_main.c
@@ -243,15 +243,16 @@ static unsigned int simple_idr_get(struct idr *idrtable, void *p,
 {
 	int id;
 	unsigned long flags;
+	unsigned long idr_index;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_irqsave(lock, flags);
-	id = idr_alloc(idrtable, p, 1, INT_MAX, GFP_NOWAIT);
+	id = idr_alloc(idrtable, p, &idr_index, 1, INT_MAX, GFP_NOWAIT);
 	spin_unlock_irqrestore(lock, flags);
 	idr_preload_end();
-	if (id < 0)
+	if (id)
 		return 0;  /* failure */
-	return (unsigned int)(id);  /* idr_alloc() guarantees > 0 */
+	return (unsigned int)(idr_index);  /* idr_alloc() guarantees > 0 */
 }
 
 /*
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 74e4975..a43b8ba 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -120,6 +120,7 @@ void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn)
 struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf)
 {
 	struct iscsi_tiqn *tiqn = NULL;
+	unsigned long idr_index;
 	int ret;
 
 	if (strlen(buf) >= ISCSI_IQN_LEN) {
@@ -146,15 +147,15 @@ struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf)
 	idr_preload(GFP_KERNEL);
 	spin_lock(&tiqn_lock);
 
-	ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT);
-	if (ret < 0) {
+	ret = idr_alloc(&tiqn_idr, NULL, &idr_index, 0, 0, GFP_NOWAIT);
+	if (ret) {
 		pr_err("idr_alloc() failed for tiqn->tiqn_index\n");
 		spin_unlock(&tiqn_lock);
 		idr_preload_end();
 		kfree(tiqn);
 		return ERR_PTR(ret);
 	}
-	tiqn->tiqn_index = ret;
+	tiqn->tiqn_index = idr_index;
 	list_add_tail(&tiqn->tiqn_list, &g_tiqn_list);
 
 	spin_unlock(&tiqn_lock);
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index e9bdc8b..2283ecc 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -300,6 +300,7 @@ static int iscsi_login_zero_tsih_s1(
 {
 	struct iscsi_session *sess = NULL;
 	struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
+	unsigned long idr_index;
 	int ret;
 
 	sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
@@ -335,13 +336,13 @@ static int iscsi_login_zero_tsih_s1(
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_bh(&sess_idr_lock);
-	ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
-	if (ret >= 0)
-		sess->session_index = ret;
+	ret = idr_alloc(&sess_idr, NULL, &idr_index, 0, 0, GFP_NOWAIT);
+	if (ret == 0)
+		sess->session_index = idr_index;
 	spin_unlock_bh(&sess_idr_lock);
 	idr_preload_end();
 
-	if (ret < 0) {
+	if (ret) {
 		pr_err("idr_alloc() for sess_idr failed\n");
 		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
 				ISCSI_LOGIN_STATUS_NO_RESOURCES);
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index e8dd6da..3b18cc4 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -908,7 +908,7 @@ struct devices_idr_iter {
 	void *data;
 };
 
-static int target_devices_idr_iter(int id, void *p, void *data)
+static int target_devices_idr_iter(unsigned long id, void *p, void *data)
 {
 	struct devices_idr_iter *iter = data;
 	struct se_device *dev = p;
@@ -951,7 +951,8 @@ int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
 int target_configure_device(struct se_device *dev)
 {
 	struct se_hba *hba = dev->se_hba;
-	int ret, id;
+	unsigned long id;
+	int ret;
 
 	if (dev->dev_flags & DF_CONFIGURED) {
 		pr_err("se_dev->se_dev_ptr already set for storage"
@@ -968,9 +969,9 @@ int target_configure_device(struct se_device *dev)
 	 * Use cyclic to try and avoid collisions with devices
 	 * that were recently removed.
 	 */
-	id = idr_alloc_cyclic(&devices_idr, dev, 0, INT_MAX, GFP_KERNEL);
+	ret = idr_alloc_cyclic(&devices_idr, dev, &id, 0, INT_MAX, GFP_KERNEL);
 	mutex_unlock(&device_mutex);
-	if (id < 0) {
+	if (ret) {
 		ret = -ENOMEM;
 		goto out;
 	}
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 80ee130..43466cc 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -430,7 +430,8 @@ static struct tcmu_cmd *tcmu_alloc_cmd(struct se_cmd *se_cmd)
 	struct se_device *se_dev = se_cmd->se_dev;
 	struct tcmu_dev *udev = TCMU_DEV(se_dev);
 	struct tcmu_cmd *tcmu_cmd;
-	int cmd_id;
+	unsigned long cmd_id;
+	int ret;
 
 	tcmu_cmd = kmem_cache_zalloc(tcmu_cmd_cache, GFP_KERNEL);
 	if (!tcmu_cmd)
@@ -453,12 +454,12 @@ static struct tcmu_cmd *tcmu_alloc_cmd(struct se_cmd *se_cmd)
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_irq(&udev->commands_lock);
-	cmd_id = idr_alloc(&udev->commands, tcmu_cmd, 0,
-		USHRT_MAX, GFP_NOWAIT);
+	ret = idr_alloc(&udev->commands, tcmu_cmd, &cmd_id, 0,
+			USHRT_MAX, GFP_NOWAIT);
 	spin_unlock_irq(&udev->commands_lock);
 	idr_preload_end();
 
-	if (cmd_id < 0) {
+	if (ret) {
 		tcmu_free_cmd(tcmu_cmd);
 		return NULL;
 	}
@@ -1028,7 +1029,7 @@ static unsigned int tcmu_handle_completions(struct tcmu_dev *udev)
 	return handled;
 }
 
-static int tcmu_check_expired_cmd(int id, void *p, void *data)
+static int tcmu_check_expired_cmd(unsigned long id, void *p, void *data)
 {
 	struct tcmu_cmd *cmd = p;
 
@@ -1577,7 +1578,7 @@ static void tcmu_destroy_device(struct se_device *dev)
 	struct tcmu_dev *udev = TCMU_DEV(dev);
 	struct tcmu_cmd *cmd;
 	bool all_expired = true;
-	int i;
+	unsigned long i;
 
 	del_timer_sync(&udev->timeout);
 
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index d356d7f0..5f1e13a 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -106,6 +106,7 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
 	struct tee_device *teedev = ctx->teedev;
 	struct tee_shm_pool_mgr *poolm = NULL;
 	struct tee_shm *shm;
+	unsigned long idr_index;
 	void *ret;
 	int rc;
 
@@ -150,12 +151,13 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
 	}
 
 	mutex_lock(&teedev->mutex);
-	shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
+	rc = idr_alloc(&teedev->idr, shm, &idr_index, 1, 0, GFP_KERNEL);
 	mutex_unlock(&teedev->mutex);
-	if (shm->id < 0) {
-		ret = ERR_PTR(shm->id);
+	if (rc) {
+		ret = ERR_PTR(rc);
 		goto err_pool_free;
 	}
+	shm->id = idr_index;
 
 	if (flags & TEE_SHM_DMA_BUF) {
 		DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index ff04b7f..05a7e81 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -372,12 +372,13 @@ static void uio_dev_del_attributes(struct uio_device *idev)
 static int uio_get_minor(struct uio_device *idev)
 {
 	int retval = -ENOMEM;
+	unsigned long idr_index;
 
 	mutex_lock(&minor_lock);
-	retval = idr_alloc(&uio_idr, idev, 0, UIO_MAX_DEVICES, GFP_KERNEL);
-	if (retval >= 0) {
-		idev->minor = retval;
-		retval = 0;
+	retval = idr_alloc(&uio_idr, idev, &idr_index, 0, UIO_MAX_DEVICES,
+			   GFP_KERNEL);
+	if (retval == 0) {
+		idev->minor = idr_index;
 	} else if (retval == -ENOSPC) {
 		dev_err(idev->dev, "too many uio devices\n");
 		retval = -EINVAL;
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 5e056064..7105336 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -97,15 +97,16 @@ static struct acm *acm_get_by_minor(unsigned int minor)
 /*
  * Try to find an available minor number and if found, associate it with 'acm'.
  */
-static int acm_alloc_minor(struct acm *acm)
+static int acm_alloc_minor(struct acm *acm, unsigned long *index)
 {
-	int minor;
+	int ret;
 
 	mutex_lock(&acm_minors_lock);
-	minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
+	ret = idr_alloc(&acm_minors, acm, index, 0, ACM_TTY_MINORS,
+			GFP_KERNEL);
 	mutex_unlock(&acm_minors_lock);
 
-	return minor;
+	return ret;
 }
 
 /* Release the minor number associated with 'acm'.  */
@@ -1219,7 +1220,6 @@ static int acm_probe(struct usb_interface *intf,
 	struct usb_device *usb_dev = interface_to_usbdev(intf);
 	struct usb_cdc_parsed_header h;
 	struct acm *acm;
-	int minor;
 	int ctrlsize, readsize;
 	u8 *buf;
 	int call_intf_num = -1;
@@ -1231,6 +1231,7 @@ static int acm_probe(struct usb_interface *intf,
 	struct device *tty_dev;
 	int rv = -ENOMEM;
 	int res;
+	unsigned long idr_index;
 
 	/* normal quirks */
 	quirks = (unsigned long)id->driver_info;
@@ -1388,8 +1389,8 @@ static int acm_probe(struct usb_interface *intf,
 	if (acm == NULL)
 		goto alloc_fail;
 
-	minor = acm_alloc_minor(acm);
-	if (minor < 0)
+	rv = acm_alloc_minor(acm, &idr_index);
+	if (rv)
 		goto alloc_fail1;
 
 	ctrlsize = usb_endpoint_maxp(epctrl);
@@ -1399,7 +1400,7 @@ static int acm_probe(struct usb_interface *intf,
 	acm->writesize = usb_endpoint_maxp(epwrite) * 20;
 	acm->control = control_interface;
 	acm->data = data_interface;
-	acm->minor = minor;
+	acm->minor = idr_index;
 	acm->dev = usb_dev;
 	if (h.usb_cdc_acm_descriptor)
 		acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
@@ -1538,7 +1539,7 @@ static int acm_probe(struct usb_interface *intf,
 	acm->nb_index = 0;
 	acm->nb_size = 0;
 
-	dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
+	dev_info(&intf->dev, "ttyACM%ld: USB ACM device\n", idr_index);
 
 	acm->line.dwDTERate = cpu_to_le32(9600);
 	acm->line.bDataBits = 8;
@@ -1548,8 +1549,9 @@ static int acm_probe(struct usb_interface *intf,
 	usb_set_intfdata(data_interface, acm);
 
 	usb_get_intf(control_interface);
-	tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
-			&control_interface->dev);
+	tty_dev = tty_port_register_device(&acm->port, acm_tty_driver,
+					   idr_index,
+					   &control_interface->dev);
 	if (IS_ERR(tty_dev)) {
 		rv = PTR_ERR(tty_dev);
 		goto alloc_fail8;
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 55dea2e..bc2a969 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -605,7 +605,7 @@ static ssize_t usb_device_read(struct file *file, char __user *buf,
 	struct usb_bus *bus;
 	ssize_t ret, total_written = 0;
 	loff_t skip_bytes = *ppos;
-	int id;
+	unsigned long id;
 
 	if (*ppos < 0)
 		return -EINVAL;
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index ab1bb3b..43d04fb 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1017,11 +1017,12 @@ static void usb_bus_init (struct usb_bus *bus)
 static int usb_register_bus(struct usb_bus *bus)
 {
 	int result = -E2BIG;
-	int busnum;
+	unsigned long busnum;
 
 	mutex_lock(&usb_bus_idr_lock);
-	busnum = idr_alloc(&usb_bus_idr, bus, 1, USB_MAXBUS, GFP_KERNEL);
-	if (busnum < 0) {
+	result = idr_alloc(&usb_bus_idr, bus, &busnum, 1, USB_MAXBUS,
+			   GFP_KERNEL);
+	if (result) {
 		pr_err("%s: failed to get bus number\n", usbcore_name);
 		goto error_find_busnum;
 	}
diff --git a/drivers/usb/mon/mon_main.c b/drivers/usb/mon/mon_main.c
index 4684734..2ab8228 100644
--- a/drivers/usb/mon/mon_main.c
+++ b/drivers/usb/mon/mon_main.c
@@ -349,7 +349,8 @@ struct mon_bus *mon_bus_lookup(unsigned int num)
 static int __init mon_init(void)
 {
 	struct usb_bus *ubus;
-	int rc, id;
+	int rc;
+	unsigned long id;
 
 	if ((rc = mon_text_init()) != 0)
 		goto err_text;
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index bb34f9f..a9bf11d 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -88,18 +88,19 @@ static int allocate_minors(struct usb_serial *serial, int num_ports)
 {
 	struct usb_serial_port *port;
 	unsigned int i, j;
-	int minor;
+	unsigned long idr_index;
+	int ret;
 
 	dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports);
 
 	mutex_lock(&table_lock);
 	for (i = 0; i < num_ports; ++i) {
 		port = serial->port[i];
-		minor = idr_alloc(&serial_minors, port, 0,
+		ret = idr_alloc(&serial_minors, port, &idr_index, 0,
 					USB_SERIAL_TTY_MINORS, GFP_KERNEL);
-		if (minor < 0)
+		if (ret)
 			goto error;
-		port->minor = minor;
+		port->minor = idr_index;
 		port->port_number = i;
 	}
 	serial->minors_reserved = 1;
@@ -110,7 +111,7 @@ static int allocate_minors(struct usb_serial *serial, int num_ports)
 	for (j = 0; j < i; ++j)
 		idr_remove(&serial_minors, serial->port[j]->minor);
 	mutex_unlock(&table_lock);
-	return minor;
+	return ret;
 }
 
 static void release_minors(struct usb_serial *serial)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 330d505..4ca1d55 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -268,9 +268,11 @@ void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops)
 /**
  * Group minor allocation/free - both called with vfio.group_lock held
  */
-static int vfio_alloc_group_minor(struct vfio_group *group)
+static int vfio_alloc_group_minor(struct vfio_group *group,
+				   unsigned long *index)
 {
-	return idr_alloc(&vfio.group_idr, group, 0, MINORMASK + 1, GFP_KERNEL);
+	return idr_alloc(&vfio.group_idr, group, index, 0, MINORMASK + 1,
+			 GFP_KERNEL);
 }
 
 static void vfio_free_group_minor(int minor)
@@ -324,7 +326,8 @@ static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group)
 {
 	struct vfio_group *group, *tmp;
 	struct device *dev;
-	int ret, minor;
+	unsigned long minor;
+	int ret;
 
 	group = kzalloc(sizeof(*group), GFP_KERNEL);
 	if (!group)
@@ -369,10 +372,10 @@ static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group)
 		}
 	}
 
-	minor = vfio_alloc_group_minor(group);
-	if (minor < 0) {
+	ret = vfio_alloc_group_minor(group, &minor);
+	if (ret) {
 		vfio_group_unlock_and_free(group);
-		return ERR_PTR(minor);
+		return ERR_PTR(ret);
 	}
 
 	dev = device_create(vfio.class, NULL,
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 6df3322..3e44d7f 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1184,6 +1184,7 @@ static void detach_lkb(struct dlm_lkb *lkb)
 static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret)
 {
 	struct dlm_lkb *lkb;
+	unsigned long idr_index;
 	int rv;
 
 	lkb = dlm_allocate_lkb(ls);
@@ -1202,13 +1203,13 @@ static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret)
 
 	idr_preload(GFP_NOFS);
 	spin_lock(&ls->ls_lkbidr_spin);
-	rv = idr_alloc(&ls->ls_lkbidr, lkb, 1, 0, GFP_NOWAIT);
-	if (rv >= 0)
-		lkb->lkb_id = rv;
+	rv = idr_alloc(&ls->ls_lkbidr, lkb, &idr_index, 1, 0, GFP_NOWAIT);
+	if (rv == 0)
+		lkb->lkb_id = idr_index;
 	spin_unlock(&ls->ls_lkbidr_spin);
 	idr_preload_end();
 
-	if (rv < 0) {
+	if (rv) {
 		log_error(ls, "create_lkb idr error %d", rv);
 		return rv;
 	}
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 91592b7..830f2e2 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -717,19 +717,19 @@ int dlm_new_lockspace(const char *name, const char *cluster,
 	return error;
 }
 
-static int lkb_idr_is_local(int id, void *p, void *data)
+static int lkb_idr_is_local(unsigned long id, void *p, void *data)
 {
 	struct dlm_lkb *lkb = p;
 
 	return lkb->lkb_nodeid == 0 && lkb->lkb_grmode != DLM_LOCK_IV;
 }
 
-static int lkb_idr_is_any(int id, void *p, void *data)
+static int lkb_idr_is_any(unsigned long id, void *p, void *data)
 {
 	return 1;
 }
 
-static int lkb_idr_free(int id, void *p, void *data)
+static int lkb_idr_free(unsigned long id, void *p, void *data)
 {
 	struct dlm_lkb *lkb = p;
 
diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index eaea789..6175536 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -305,6 +305,7 @@ static int recover_idr_empty(struct dlm_ls *ls)
 static int recover_idr_add(struct dlm_rsb *r)
 {
 	struct dlm_ls *ls = r->res_ls;
+	unsigned long idr_index;
 	int rv;
 
 	idr_preload(GFP_NOFS);
@@ -313,14 +314,13 @@ static int recover_idr_add(struct dlm_rsb *r)
 		rv = -1;
 		goto out_unlock;
 	}
-	rv = idr_alloc(&ls->ls_recover_idr, r, 1, 0, GFP_NOWAIT);
-	if (rv < 0)
+	rv = idr_alloc(&ls->ls_recover_idr, r, &idr_index, 1, 0, GFP_NOWAIT);
+	if (rv)
 		goto out_unlock;
 
-	r->res_id = rv;
+	r->res_id = idr_index;
 	ls->ls_recover_list_count++;
 	dlm_hold_rsb(r);
-	rv = 0;
 out_unlock:
 	spin_unlock(&ls->ls_recover_idr_lock);
 	idr_preload_end();
@@ -353,7 +353,7 @@ static struct dlm_rsb *recover_idr_find(struct dlm_ls *ls, uint64_t id)
 static void recover_idr_clear(struct dlm_ls *ls)
 {
 	struct dlm_rsb *r;
-	int id;
+	unsigned long id;
 
 	spin_lock(&ls->ls_recover_idr_lock);
 
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index e9bea90..7a45ccb 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -27,18 +27,19 @@
 static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
 {
 	int ret = 0;
+	unsigned long idr_index;
 	struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
 
 	if (clp->rpc_ops->version != 4 || minorversion != 0)
 		return ret;
 	idr_preload(GFP_KERNEL);
 	spin_lock(&nn->nfs_client_lock);
-	ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT);
-	if (ret >= 0)
-		clp->cl_cb_ident = ret;
+	ret = idr_alloc(&nn->cb_ident_idr, clp, &idr_index, 1, 0, GFP_NOWAIT);
+	if (ret == 0)
+		clp->cl_cb_ident = idr_index;
 	spin_unlock(&nn->nfs_client_lock);
 	idr_preload_end();
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 #ifdef CONFIG_NFS_V4_1
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 0c04f81..cf14954 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -637,7 +637,8 @@ struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *sla
 				  void (*sc_free)(struct nfs4_stid *))
 {
 	struct nfs4_stid *stid;
-	int new_id;
+	unsigned long new_id;
+	int ret;
 
 	stid = kmem_cache_zalloc(slab, GFP_KERNEL);
 	if (!stid)
@@ -645,10 +646,11 @@ struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *sla
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&cl->cl_lock);
-	new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
+	ret = idr_alloc_cyclic(&cl->cl_stateids, stid, &new_id, 0, 0,
+				GFP_NOWAIT);
 	spin_unlock(&cl->cl_lock);
 	idr_preload_end();
-	if (new_id < 0)
+	if (ret)
 		goto out_free;
 
 	stid->sc_free = sc_free;
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 8b73332..4bc9b40 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -134,7 +134,7 @@ static void inotify_freeing_mark(struct fsnotify_mark *fsn_mark, struct fsnotify
  * torn down.  This is only called if the idr is about to be freed but there
  * are still marks in it.
  */
-static int idr_callback(int id, void *p, void *data)
+static int idr_callback(unsigned long id, void *p, void *data)
 {
 	struct fsnotify_mark *fsn_mark;
 	struct inotify_inode_mark *i_mark;
@@ -147,7 +147,7 @@ static int idr_callback(int id, void *p, void *data)
 	fsn_mark = p;
 	i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
 
-	WARN(1, "inotify closing but id=%d for fsn_mark=%p in group=%p still in "
+	WARN(1, "inotify closing but id=%lu for fsn_mark=%p in group=%p still in "
 		"idr.  Probably leaking memory\n", id, p, data);
 
 	/*
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 7cc7d3f..95915f8 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -345,20 +345,21 @@ static int inotify_add_to_idr(struct idr *idr, spinlock_t *idr_lock,
 			      struct inotify_inode_mark *i_mark)
 {
 	int ret;
+	unsigned long idr_index;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(idr_lock);
 
-	ret = idr_alloc_cyclic(idr, i_mark, 1, 0, GFP_NOWAIT);
-	if (ret >= 0) {
+	ret = idr_alloc_cyclic(idr, i_mark, &idr_index, 1, 0, GFP_NOWAIT);
+	if (ret == 0) {
 		/* we added the mark to the idr, take a reference */
-		i_mark->wd = ret;
+		i_mark->wd = idr_index;
 		fsnotify_get_mark(&i_mark->fsn_mark);
 	}
 
 	spin_unlock(idr_lock);
 	idr_preload_end();
-	return ret < 0 ? ret : 0;
+	return ret;
 }
 
 static struct inotify_inode_mark *inotify_idr_find_locked(struct fsnotify_group *group,
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 8d77922..27ff262 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -306,15 +306,17 @@ static u8 o2net_num_from_nn(struct o2net_node *nn)
 static int o2net_prep_nsw(struct o2net_node *nn, struct o2net_status_wait *nsw)
 {
 	int ret;
+	unsigned long idr_index;
 
 	spin_lock(&nn->nn_lock);
-	ret = idr_alloc(&nn->nn_status_idr, nsw, 0, 0, GFP_ATOMIC);
-	if (ret >= 0) {
-		nsw->ns_id = ret;
+	ret = idr_alloc(&nn->nn_status_idr, nsw, &idr_index, 0, 0,
+			GFP_ATOMIC);
+	if (ret == 0) {
+		nsw->ns_id = idr_index;
 		list_add_tail(&nsw->ns_node_item, &nn->nn_status_list);
 	}
 	spin_unlock(&nn->nn_lock);
-	if (ret < 0)
+	if (ret)
 		return ret;
 
 	init_waitqueue_head(&nsw->ns_wq);
diff --git a/include/linux/idr.h b/include/linux/idr.h
index bf70b3e..1845576 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -18,7 +18,7 @@
 
 struct idr {
 	struct radix_tree_root	idr_rt;
-	unsigned int		idr_next;
+	unsigned long		idr_next;
 };
 
 /*
@@ -57,7 +57,7 @@ static inline unsigned int idr_get_cursor(const struct idr *idr)
  * The next call to idr_alloc_cyclic() will return @val if it is free
  * (otherwise the search will start from this position).
  */
-static inline void idr_set_cursor(struct idr *idr, unsigned int val)
+static inline void idr_set_cursor(struct idr *idr, unsigned long val)
 {
 	WRITE_ONCE(idr->idr_next, val);
 }
@@ -80,15 +80,17 @@ static inline void idr_set_cursor(struct idr *idr, unsigned int val)
  */
 
 void idr_preload(gfp_t gfp_mask);
-int idr_alloc(struct idr *, void *entry, int start, int end, gfp_t);
-int idr_alloc_cyclic(struct idr *, void *entry, int start, int end, gfp_t);
-int idr_for_each(const struct idr *,
-		 int (*fn)(int id, void *p, void *data), void *data);
-void *idr_get_next(struct idr *, int *nextid);
-void *idr_replace(struct idr *, void *, int id);
-void idr_destroy(struct idr *);
-
-static inline void *idr_remove(struct idr *idr, int id)
+int idr_alloc(struct idr *idr, void *ptr, unsigned long *index,
+	      unsigned long start, unsigned long end, gfp_t gfp);
+int idr_alloc_cyclic(struct idr *idr, void *entry, unsigned long *index,
+		     unsigned long start, unsigned long end, gfp_t gfp);
+int idr_for_each(const struct idr *idr,
+		 int (*fn)(unsigned long id, void *p, void *data), void *data);
+void *idr_get_next(struct idr *idr, unsigned long *nextid);
+void *idr_replace(struct idr *idr, void *ptr, unsigned long id);
+void idr_destroy(struct idr *idr);
+
+static inline void *idr_remove(struct idr *idr, unsigned long id)
 {
 	return radix_tree_delete_item(&idr->idr_rt, id, NULL);
 }
@@ -128,7 +130,7 @@ static inline void idr_preload_end(void)
  * This function can be called under rcu_read_lock(), given that the leaf
  * pointers lifetimes are correctly managed.
  */
-static inline void *idr_find(const struct idr *idr, int id)
+static inline void *idr_find(const struct idr *idr, unsigned long id)
 {
 	return radix_tree_lookup(&idr->idr_rt, id);
 }
diff --git a/include/linux/of.h b/include/linux/of.h
index 4a8a709..ceb14bf 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -1307,7 +1307,7 @@ struct of_overlay_notify_data {
 #ifdef CONFIG_OF_OVERLAY
 
 /* ID based overlays; the API for external users */
-int of_overlay_create(struct device_node *tree);
+int of_overlay_create(struct device_node *tree, *unsigned long *id);
 int of_overlay_destroy(int id);
 int of_overlay_destroy_all(void);
 
@@ -1316,7 +1316,7 @@ struct of_overlay_notify_data {
 
 #else
 
-static inline int of_overlay_create(struct device_node *tree)
+static inline int of_overlay_create(struct device_node *tree, unsigned long *id)
 {
 	return -ENOTSUPP;
 }
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 3e57350..14874e2 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -358,7 +358,7 @@ int radix_tree_split(struct radix_tree_root *, unsigned long index,
 int radix_tree_join(struct radix_tree_root *, unsigned long index,
 			unsigned new_order, void *);
 void __rcu **idr_get_free(struct radix_tree_root *, struct radix_tree_iter *,
-			gfp_t, int end);
+			gfp_t, unsigned long end);
 
 enum {
 	RADIX_TREE_ITER_TAG_MASK = 0x0f,	/* tag index in lower nybble */
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index b8eb51a..1bdc805 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -567,7 +567,7 @@ struct p9_fcall {
 
 struct p9_idpool *p9_idpool_create(void);
 void p9_idpool_destroy(struct p9_idpool *);
-int p9_idpool_get(struct p9_idpool *p);
+int p9_idpool_get(struct p9_idpool *p, int *index);
 void p9_idpool_put(int id, struct p9_idpool *p);
 int p9_idpool_check(int id, struct p9_idpool *p);
 
diff --git a/ipc/msg.c b/ipc/msg.c
index 2c38f10..31013ff 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -143,7 +143,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
 
 	/* ipc_addid() locks msq upon success. */
 	retval = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);
-	if (retval < 0) {
+	if (retval) {
 		call_rcu(&msq->q_perm.rcu, msg_rcu_free);
 		return retval;
 	}
diff --git a/ipc/sem.c b/ipc/sem.c
index 38371e9..5144ccd 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -514,7 +514,7 @@ static int newary(struct ipc_namespace *ns, struct ipc_params *params)
 	sma->sem_ctime = get_seconds();
 
 	retval = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);
-	if (retval < 0) {
+	if (retval) {
 		call_rcu(&sma->sem_perm.rcu, sem_rcu_free);
 		return retval;
 	}
diff --git a/ipc/shm.c b/ipc/shm.c
index 8828b4c..037b21f 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -298,7 +298,7 @@ static void shm_close(struct vm_area_struct *vma)
 }
 
 /* Called with ns->shm_ids(ns).rwsem locked */
-static int shm_try_destroy_orphaned(int id, void *p, void *data)
+static int shm_try_destroy_orphaned(unsigned long id, void *p, void *data)
 {
 	struct ipc_namespace *ns = data;
 	struct kern_ipc_perm *ipcp = p;
@@ -599,7 +599,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
 	shp->shm_creator = current;
 
 	error = ipc_addid(&shm_ids(ns), &shp->shm_perm, ns->shm_ctlmni);
-	if (error < 0)
+	if (error)
 		goto no_id;
 
 	list_add(&shp->shm_clist, &current->sysvshm.shm_clist);
diff --git a/ipc/util.c b/ipc/util.c
index 1a2cb02..5a46124 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -221,8 +221,9 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int size)
 {
 	kuid_t euid;
 	kgid_t egid;
-	int id;
+	int ret;
 	int next_id = ids->next_id;
+	unsigned long idr_index;
 
 	if (size > IPCMNI)
 		size = IPCMNI;
@@ -242,14 +243,14 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int size)
 	new->cuid = new->uid = euid;
 	new->gid = new->cgid = egid;
 
-	id = idr_alloc(&ids->ipcs_idr, new,
-		       (next_id < 0) ? 0 : ipcid_to_idx(next_id), 0,
-		       GFP_NOWAIT);
+	ret = idr_alloc(&ids->ipcs_idr, new, &idr_index,
+			(next_id < 0) ? 0 : ipcid_to_idx(next_id), 0,
+			GFP_NOWAIT);
 	idr_preload_end();
-	if (id < 0) {
+	if (ret) {
 		spin_unlock(&new->lock);
 		rcu_read_unlock();
-		return id;
+		return ret;
 	}
 
 	ids->in_use++;
@@ -263,8 +264,8 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int size)
 		ids->next_id = -1;
 	}
 
-	new->id = ipc_buildid(id, new->seq);
-	return id;
+	new->id = ipc_buildid(idr_index, new->seq);
+	return ret;
 }
 
 /**
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index fbe09a0..ba6b485 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -169,18 +169,19 @@ static void bpf_map_uncharge_memlock(struct bpf_map *map)
 
 static int bpf_map_alloc_id(struct bpf_map *map)
 {
-	int id;
+	int ret;
+	unsigned long id;
 
 	spin_lock_bh(&map_idr_lock);
-	id = idr_alloc_cyclic(&map_idr, map, 1, INT_MAX, GFP_ATOMIC);
-	if (id > 0)
+	ret = idr_alloc_cyclic(&map_idr, map, &id, 1, INT_MAX, GFP_ATOMIC);
+	if (ret == 0)
 		map->id = id;
 	spin_unlock_bh(&map_idr_lock);
 
 	if (WARN_ON_ONCE(!id))
 		return -ENOSPC;
 
-	return id > 0 ? 0 : id;
+	return ret;
 }
 
 static void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock)
@@ -771,11 +772,12 @@ static void bpf_prog_uncharge_memlock(struct bpf_prog *prog)
 
 static int bpf_prog_alloc_id(struct bpf_prog *prog)
 {
-	int id;
+	int ret;
+	unsigned long id;
 
 	spin_lock_bh(&prog_idr_lock);
-	id = idr_alloc_cyclic(&prog_idr, prog, 1, INT_MAX, GFP_ATOMIC);
-	if (id > 0)
+	ret = idr_alloc_cyclic(&prog_idr, prog, &id, 1, INT_MAX, GFP_ATOMIC);
+	if (ret == 0)
 		prog->aux->id = id;
 	spin_unlock_bh(&prog_idr_lock);
 
@@ -783,7 +785,7 @@ static int bpf_prog_alloc_id(struct bpf_prog *prog)
 	if (WARN_ON_ONCE(!id))
 		return -ENOSPC;
 
-	return id > 0 ? 0 : id;
+	return ret;
 }
 
 static void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock)
@@ -1202,7 +1204,7 @@ static int bpf_obj_get_next_id(const union bpf_attr *attr,
 			       struct idr *idr,
 			       spinlock_t *lock)
 {
-	u32 next_id = attr->start_id;
+	unsigned long next_id = attr->start_id;
 	int err = 0;
 
 	if (CHECK_ATTR(BPF_OBJ_GET_NEXT_ID) || next_id >= INT_MAX)
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index df2e0f1..1d774c2 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -286,15 +286,18 @@ bool cgroup_on_dfl(const struct cgroup *cgrp)
 }
 
 /* IDR wrappers which synchronize using cgroup_idr_lock */
-static int cgroup_idr_alloc(struct idr *idr, void *ptr, int start, int end,
-			    gfp_t gfp_mask)
+static int cgroup_idr_alloc(struct idr *idr, void *ptr, int *index,
+			    int start, int end, gfp_t gfp_mask)
 {
 	int ret;
+	unsigned long idr_index;
 
 	idr_preload(gfp_mask);
 	spin_lock_bh(&cgroup_idr_lock);
-	ret = idr_alloc(idr, ptr, start, end, gfp_mask & ~__GFP_DIRECT_RECLAIM);
+	ret = idr_alloc(idr, ptr, &idr_index, start, end,
+			gfp_mask & ~__GFP_DIRECT_RECLAIM);
 	spin_unlock_bh(&cgroup_idr_lock);
+	*index = idr_index;
 	idr_preload_end();
 	return ret;
 }
@@ -1040,13 +1043,15 @@ struct cgroup_root *cgroup_root_from_kf(struct kernfs_root *kf_root)
 
 static int cgroup_init_root_id(struct cgroup_root *root)
 {
-	int id;
+	int ret;
+	unsigned long id;
 
 	lockdep_assert_held(&cgroup_mutex);
 
-	id = idr_alloc_cyclic(&cgroup_hierarchy_idr, root, 0, 0, GFP_KERNEL);
-	if (id < 0)
-		return id;
+	ret = idr_alloc_cyclic(&cgroup_hierarchy_idr, root, &id, 0, 0,
+			       GFP_KERNEL);
+	if (ret)
+		return ret;
 
 	root->hierarchy_id = id;
 	return 0;
@@ -1703,14 +1708,15 @@ int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask, int ref_flags)
 	struct cgroup *root_cgrp = &root->cgrp;
 	struct kernfs_syscall_ops *kf_sops;
 	struct css_set *cset;
-	int i, ret;
+	int i, ret, index;
 
 	lockdep_assert_held(&cgroup_mutex);
 
-	ret = cgroup_idr_alloc(&root->cgroup_idr, root_cgrp, 1, 2, GFP_KERNEL);
-	if (ret < 0)
+	ret = cgroup_idr_alloc(&root->cgroup_idr, root_cgrp, &index, 1, 2,
+			       GFP_KERNEL);
+	if (ret)
 		goto out;
-	root_cgrp->id = ret;
+	root_cgrp->id = index;
 	root_cgrp->ancestor_ids[0] = ret;
 
 	ret = percpu_ref_init(&root_cgrp->self.refcnt, css_release,
@@ -1955,7 +1961,7 @@ int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen)
 {
 	struct cgroup_root *root;
 	struct cgroup *cgrp;
-	int hierarchy_id = 1;
+	unsigned long hierarchy_id = 1;
 	int ret;
 
 	mutex_lock(&cgroup_mutex);
@@ -4127,7 +4133,7 @@ static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
 	struct cgroup *parent = cgroup_parent(cgrp);
 	struct cgroup_subsys_state *parent_css = cgroup_css(parent, ss);
 	struct cgroup_subsys_state *css;
-	int err;
+	int err, index;
 
 	lockdep_assert_held(&cgroup_mutex);
 
@@ -4143,10 +4149,10 @@ static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
 	if (err)
 		goto err_free_css;
 
-	err = cgroup_idr_alloc(&ss->css_idr, NULL, 2, 0, GFP_KERNEL);
-	if (err < 0)
+	err = cgroup_idr_alloc(&ss->css_idr, NULL, &index, 2, 0, GFP_KERNEL);
+	if (err)
 		goto err_free_css;
-	css->id = err;
+	css->id = index;
 
 	/* @css is ready to be brought online now, make it visible */
 	list_add_tail_rcu(&css->sibling, &parent_css->children);
@@ -4200,8 +4206,10 @@ static struct cgroup *cgroup_create(struct cgroup *parent)
 	 * Temporarily set the pointer to NULL, so idr_find() won't return
 	 * a half-baked cgroup.
 	 */
-	cgrp->id = cgroup_idr_alloc(&root->cgroup_idr, NULL, 2, 0, GFP_KERNEL);
-	if (cgrp->id < 0) {
+	ret = cgroup_idr_alloc(&root->cgroup_idr, NULL, &cgrp->id, 2, 0,
+			       GFP_KERNEL);
+
+	if (ret) {
 		ret = -ENOMEM;
 		goto out_cancel_ref;
 	}
@@ -4501,6 +4509,7 @@ int cgroup_rmdir(struct kernfs_node *kn)
 static void __init cgroup_init_subsys(struct cgroup_subsys *ss, bool early)
 {
 	struct cgroup_subsys_state *css;
+	int ret;
 
 	pr_debug("Initializing cgroup subsys %s\n", ss->name);
 
@@ -4526,8 +4535,9 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss, bool early)
 		/* allocation can't be done safely during early init */
 		css->id = 1;
 	} else {
-		css->id = cgroup_idr_alloc(&ss->css_idr, css, 1, 2, GFP_KERNEL);
-		BUG_ON(css->id < 0);
+		ret = cgroup_idr_alloc(&ss->css_idr, css, &css->id, 1, 2,
+				       GFP_KERNEL);
+		WARN_ON(ret);
 	}
 
 	/* Update the init_css_set to contain a subsys
@@ -4598,6 +4608,7 @@ int __init cgroup_init_early(void)
 int __init cgroup_init(void)
 {
 	struct cgroup_subsys *ss;
+	int ret;
 	int ssid;
 
 	BUILD_BUG_ON(CGROUP_SUBSYS_COUNT > 16);
@@ -4631,9 +4642,9 @@ int __init cgroup_init(void)
 			struct cgroup_subsys_state *css =
 				init_css_set.subsys[ss->id];
 
-			css->id = cgroup_idr_alloc(&ss->css_idr, css, 1, 2,
-						   GFP_KERNEL);
-			BUG_ON(css->id < 0);
+			ret = cgroup_idr_alloc(&ss->css_idr, css, &css->id,
+					       1, 2, GFP_KERNEL);
+			WARN_ON(ret);
 		} else {
 			cgroup_init_subsys(ss, false);
 		}
diff --git a/kernel/events/core.c b/kernel/events/core.c
index a7a6c1d..4cb50bb 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9013,6 +9013,7 @@ static int pmu_dev_alloc(struct pmu *pmu)
 int perf_pmu_register(struct pmu *pmu, const char *name, int type)
 {
 	int cpu, ret;
+	unsigned long idr_index;
 
 	mutex_lock(&pmus_lock);
 	ret = -ENOMEM;
@@ -9026,13 +9027,12 @@ int perf_pmu_register(struct pmu *pmu, const char *name, int type)
 	pmu->name = name;
 
 	if (type < 0) {
-		type = idr_alloc(&pmu_idr, pmu, PERF_TYPE_MAX, 0, GFP_KERNEL);
-		if (type < 0) {
-			ret = type;
+		ret = idr_alloc(&pmu_idr, pmu, &idr_index, PERF_TYPE_MAX, 0,
+				GFP_KERNEL);
+		if (ret)
 			goto free_pdc;
-		}
 	}
-	pmu->type = type;
+	pmu->type = idr_index;
 
 	if (pmu_bus_running) {
 		ret = pmu_dev_alloc(pmu);
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ca937b0..213b338 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -533,13 +533,14 @@ static inline void debug_work_deactivate(struct work_struct *work) { }
 static int worker_pool_assign_id(struct worker_pool *pool)
 {
 	int ret;
+	unsigned long idr_index;
 
 	lockdep_assert_held(&wq_pool_mutex);
 
-	ret = idr_alloc(&worker_pool_idr, pool, 0, WORK_OFFQ_POOL_NONE,
-			GFP_KERNEL);
-	if (ret >= 0) {
-		pool->id = ret;
+	ret = idr_alloc(&worker_pool_idr, pool, &idr_index, 0,
+			WORK_OFFQ_POOL_NONE, GFP_KERNEL);
+	if (ret == 0) {
+		pool->id = idr_index;
 		return 0;
 	}
 	return ret;
@@ -4427,7 +4428,7 @@ void show_workqueue_state(void)
 	struct workqueue_struct *wq;
 	struct worker_pool *pool;
 	unsigned long flags;
-	int pi;
+	unsigned long pi;
 
 	rcu_read_lock_sched();
 
@@ -4674,7 +4675,7 @@ int workqueue_online_cpu(unsigned int cpu)
 {
 	struct worker_pool *pool;
 	struct workqueue_struct *wq;
-	int pi;
+	unsigned long pi;
 
 	mutex_lock(&wq_pool_mutex);
 
@@ -5380,7 +5381,7 @@ static void wq_watchdog_timer_fn(unsigned long data)
 	unsigned long thresh = READ_ONCE(wq_watchdog_thresh) * HZ;
 	bool lockup_detected = false;
 	struct worker_pool *pool;
-	int pi;
+	unsigned long pi;
 
 	if (!thresh)
 		return;
diff --git a/lib/idr.c b/lib/idr.c
index b13682b..e941cd1 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -11,12 +11,13 @@
  * idr_alloc - allocate an id
  * @idr: idr handle
  * @ptr: pointer to be associated with the new id
+ * @index: pointer to return allocated id, could be NULL
  * @start: the minimum id (inclusive)
  * @end: the maximum id (exclusive)
  * @gfp: memory allocation flags
  *
  * Allocates an unused ID in the range [start, end).  Returns -ENOSPC
- * if there are no unused IDs in that range.
+ * if there are no unused IDs in that range.  Return 0 for success.
  *
  * Note that @end is treated as max when <= 0.  This is to always allow
  * using @start + N as @end as long as N is inside integer range.
@@ -26,13 +27,12 @@
  * concurrently with read-only accesses to the @idr, such as idr_find() and
  * idr_for_each_entry().
  */
-int idr_alloc(struct idr *idr, void *ptr, int start, int end, gfp_t gfp)
+int idr_alloc(struct idr *idr, void *ptr, unsigned long *index,
+	      unsigned long start, unsigned long end, gfp_t gfp)
 {
 	void __rcu **slot;
 	struct radix_tree_iter iter;
 
-	if (WARN_ON_ONCE(start < 0))
-		return -EINVAL;
 	if (WARN_ON_ONCE(radix_tree_is_internal_node(ptr)))
 		return -EINVAL;
 
@@ -43,7 +43,10 @@ int idr_alloc(struct idr *idr, void *ptr, int start, int end, gfp_t gfp)
 
 	radix_tree_iter_replace(&idr->idr_rt, &iter, slot, ptr);
 	radix_tree_iter_tag_clear(&idr->idr_rt, &iter, IDR_FREE);
-	return iter.index;
+
+	if (index)
+		*index = iter.index;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(idr_alloc);
 
@@ -51,6 +54,7 @@ int idr_alloc(struct idr *idr, void *ptr, int start, int end, gfp_t gfp)
  * idr_alloc_cyclic - allocate new idr entry in a cyclical fashion
  * @idr: idr handle
  * @ptr: pointer to be associated with the new id
+ * @index: pointer to return allocated id, could be NULL
  * @start: the minimum id (inclusive)
  * @end: the maximum id (exclusive)
  * @gfp: memory allocation flags
@@ -59,21 +63,23 @@ int idr_alloc(struct idr *idr, void *ptr, int start, int end, gfp_t gfp)
  * If not, it will attempt to allocate the smallest ID that is larger or
  * equal to @start.
  */
-int idr_alloc_cyclic(struct idr *idr, void *ptr, int start, int end, gfp_t gfp)
+int idr_alloc_cyclic(struct idr *idr, void *ptr, unsigned long *index,
+		     unsigned long start, unsigned long end, gfp_t gfp)
 {
-	int id, curr = idr->idr_next;
+	int ret;
+	unsigned long curr = idr->idr_next;
 
 	if (curr < start)
 		curr = start;
 
-	id = idr_alloc(idr, ptr, curr, end, gfp);
-	if ((id == -ENOSPC) && (curr > start))
-		id = idr_alloc(idr, ptr, start, curr, gfp);
+	ret = idr_alloc(idr, ptr, index, curr, end, gfp);
+	if (ret == -ENOSPC && curr > start)
+		ret = idr_alloc(idr, ptr, index, start, curr, gfp);
 
-	if (id >= 0)
-		idr->idr_next = id + 1U;
+	if (*index >= 0)
+		idr->idr_next = *index + 1UL;
 
-	return id;
+	return ret;
 }
 EXPORT_SYMBOL(idr_alloc_cyclic);
 
@@ -95,7 +101,7 @@ int idr_alloc_cyclic(struct idr *idr, void *ptr, int start, int end, gfp_t gfp)
  * will not cause other entries to be skipped, nor spurious ones to be seen.
  */
 int idr_for_each(const struct idr *idr,
-		int (*fn)(int id, void *p, void *data), void *data)
+		 int (*fn)(unsigned long id, void *p, void *data), void *data)
 {
 	struct radix_tree_iter iter;
 	void __rcu **slot;
@@ -120,7 +126,7 @@ int idr_for_each(const struct idr *idr,
  * to the ID of the found value.  To use in a loop, the value pointed to by
  * nextid must be incremented by the user.
  */
-void *idr_get_next(struct idr *idr, int *nextid)
+void *idr_get_next(struct idr *idr, unsigned long *nextid)
 {
 	struct radix_tree_iter iter;
 	void __rcu **slot;
@@ -148,7 +154,7 @@ void *idr_get_next(struct idr *idr, int *nextid)
  * Returns: 0 on success.  %-ENOENT indicates that @id was not found.
  * %-EINVAL indicates that @id or @ptr were not valid.
  */
-void *idr_replace(struct idr *idr, void *ptr, int id)
+void *idr_replace(struct idr *idr, void *ptr, unsigned long id)
 {
 	struct radix_tree_node *node;
 	void __rcu **slot = NULL;
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 898e879..87d8748 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -2138,12 +2138,13 @@ int ida_pre_get(struct ida *ida, gfp_t gfp)
 EXPORT_SYMBOL(ida_pre_get);
 
 void __rcu **idr_get_free(struct radix_tree_root *root,
-			struct radix_tree_iter *iter, gfp_t gfp, int end)
+			   struct radix_tree_iter *iter, gfp_t gfp,
+			   unsigned long end)
 {
 	struct radix_tree_node *node = NULL, *child;
 	void __rcu **slot = (void __rcu **)&root->rnode;
 	unsigned long maxindex, start = iter->next_index;
-	unsigned long max = end > 0 ? end - 1 : INT_MAX;
+	unsigned long max = end - 1;
 	unsigned int shift, offset = 0;
 
  grow:
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3df3c04..5b310ec 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4166,6 +4166,8 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
 	struct mem_cgroup *memcg;
 	size_t size;
 	int node;
+	unsigned long idr_index;
+	int ret;
 
 	size = sizeof(struct mem_cgroup);
 	size += nr_node_ids * sizeof(struct mem_cgroup_per_node *);
@@ -4174,11 +4176,12 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
 	if (!memcg)
 		return NULL;
 
-	memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL,
-				 1, MEM_CGROUP_ID_MAX,
-				 GFP_KERNEL);
-	if (memcg->id.id < 0)
+	ret = idr_alloc(&mem_cgroup_idr, NULL,
+			&idr_index, 1, MEM_CGROUP_ID_MAX,
+			GFP_KERNEL);
+	if (ret)
 		goto fail;
+	memcg->id.id = idr_index;
 
 	memcg->stat = alloc_percpu(struct mem_cgroup_stat_cpu);
 	if (!memcg->stat)
diff --git a/net/9p/client.c b/net/9p/client.c
index 4674235..484de6e6 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -361,14 +361,15 @@ struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
 static int p9_tag_init(struct p9_client *c)
 {
 	int err = 0;
+	int index;
 
 	c->tagpool = p9_idpool_create();
 	if (IS_ERR(c->tagpool)) {
 		err = PTR_ERR(c->tagpool);
 		goto error;
 	}
-	err = p9_idpool_get(c->tagpool); /* reserve tag 0 */
-	if (err < 0) {
+	err = p9_idpool_get(c->tagpool, &index); /* reserve tag 0 */
+	if (err) {
 		p9_idpool_destroy(c->tagpool);
 		goto error;
 	}
@@ -714,8 +715,8 @@ static struct p9_req_t *p9_client_prepare_req(struct p9_client *c,
 
 	tag = P9_NOTAG;
 	if (type != P9_TVERSION) {
-		tag = p9_idpool_get(c->tagpool);
-		if (tag < 0)
+		err = p9_idpool_get(c->tagpool, &tag);
+		if (err)
 			return ERR_PTR(-ENOMEM);
 	}
 
@@ -905,7 +906,7 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
 
 static struct p9_fid *p9_fid_create(struct p9_client *clnt)
 {
-	int ret;
+	int ret, index;
 	struct p9_fid *fid;
 	unsigned long flags;
 
@@ -914,12 +915,12 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt)
 	if (!fid)
 		return ERR_PTR(-ENOMEM);
 
-	ret = p9_idpool_get(clnt->fidpool);
-	if (ret < 0) {
+	ret = p9_idpool_get(clnt->fidpool, &index);
+	if (ret) {
 		ret = -ENOSPC;
 		goto error;
 	}
-	fid->fid = ret;
+	fid->fid = index;
 
 	memset(&fid->qid, 0, sizeof(struct p9_qid));
 	fid->mode = -1;
diff --git a/net/9p/util.c b/net/9p/util.c
index 59f278e..328fdcb 100644
--- a/net/9p/util.c
+++ b/net/9p/util.c
@@ -85,24 +85,26 @@ void p9_idpool_destroy(struct p9_idpool *p)
  *            the lock included in struct idr?
  */
 
-int p9_idpool_get(struct p9_idpool *p)
+int p9_idpool_get(struct p9_idpool *p, int *index)
 {
-	int i;
+	int ret;
+	unsigned long idr_index;
 	unsigned long flags;
 
 	idr_preload(GFP_NOFS);
 	spin_lock_irqsave(&p->lock, flags);
 
 	/* no need to store exactly p, we just need something non-null */
-	i = idr_alloc(&p->pool, p, 0, 0, GFP_NOWAIT);
+	ret = idr_alloc(&p->pool, p, &idr_index, 0, 0, GFP_NOWAIT);
+	*index = idr_index;
 
 	spin_unlock_irqrestore(&p->lock, flags);
 	idr_preload_end();
-	if (i < 0)
+	if (ret)
 		return -1;
 
-	p9_debug(P9_DEBUG_MUX, " id %d pool %p\n", i, p);
-	return i;
+	p9_debug(P9_DEBUG_MUX, " ret %d id %d pool %p\n", ret, *index, p);
+	return ret;
 }
 EXPORT_SYMBOL(p9_idpool_get);
 
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 6cfdc7c..a1cee8a 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -156,7 +156,8 @@ static void ops_free_list(const struct pernet_operations *ops,
 }
 
 /* should be called with nsid_lock held */
-static int alloc_netid(struct net *net, struct net *peer, int reqid)
+static int alloc_netid(struct net *net, struct net *peer, int reqid,
+		       unsigned long *index)
 {
 	int min = 0, max = 0;
 
@@ -165,7 +166,7 @@ static int alloc_netid(struct net *net, struct net *peer, int reqid)
 		max = reqid + 1;
 	}
 
-	return idr_alloc(&net->netns_ids, peer, min, max, GFP_ATOMIC);
+	return idr_alloc(&net->netns_ids, peer, index, min, max, GFP_ATOMIC);
 }
 
 /* This function is used by idr_for_each(). If net is equal to peer, the
@@ -174,7 +175,7 @@ static int alloc_netid(struct net *net, struct net *peer, int reqid)
  * NET_ID_ZERO (-1) for it.
  */
 #define NET_ID_ZERO -1
-static int net_eq_idr(int id, void *net, void *peer)
+static int net_eq_idr(unsigned long id, void *net, void *peer)
 {
 	if (net_eq(net, peer))
 		return id ? : NET_ID_ZERO;
@@ -189,6 +190,8 @@ static int __peernet2id_alloc(struct net *net, struct net *peer, bool *alloc)
 {
 	int id = idr_for_each(&net->netns_ids, net_eq_idr, peer);
 	bool alloc_it = *alloc;
+	unsigned long index;
+	int ret;
 
 	*alloc = false;
 
@@ -199,9 +202,9 @@ static int __peernet2id_alloc(struct net *net, struct net *peer, bool *alloc)
 		return id;
 
 	if (alloc_it) {
-		id = alloc_netid(net, peer, -1);
+		ret = alloc_netid(net, peer, -1, &index);
 		*alloc = true;
-		return id >= 0 ? id : NETNSA_NSID_NOT_ASSIGNED;
+		return ret == 0 ? index : NETNSA_NSID_NOT_ASSIGNED;
 	}
 
 	return NETNSA_NSID_NOT_ASSIGNED;
@@ -616,6 +619,7 @@ static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh,
 	struct nlattr *nla;
 	struct net *peer;
 	int nsid, err;
+	unsigned long index;
 
 	err = nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, NETNSA_MAX,
 			  rtnl_net_policy, extack);
@@ -653,11 +657,10 @@ static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh,
 		goto out;
 	}
 
-	err = alloc_netid(net, peer, nsid);
+	err = alloc_netid(net, peer, nsid, &index);
 	spin_unlock_bh(&net->nsid_lock);
-	if (err >= 0) {
-		rtnl_net_notifyid(net, RTM_NEWNSID, err);
-		err = 0;
+	if (err == 0) {
+		rtnl_net_notifyid(net, RTM_NEWNSID, index);
 	} else if (err == -ENOSPC && nsid >= 0) {
 		err = -EEXIST;
 		NL_SET_BAD_ATTR(extack, tb[NETNSA_NSID]);
@@ -760,7 +763,7 @@ struct rtnl_net_dump_cb {
 	int s_idx;
 };
 
-static int rtnl_net_dumpid_one(int id, void *peer, void *data)
+static int rtnl_net_dumpid_one(unsigned long id, void *peer, void *data)
 {
 	struct rtnl_net_dump_cb *net_cb = (struct rtnl_net_dump_cb *)data;
 	int ret;
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index a354f19..e96ffe5 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -266,6 +266,7 @@ static int ieee80211_add_nan_func(struct wiphy *wiphy,
 				  struct cfg80211_nan_func *nan_func)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	unsigned long idr_index;
 	int ret;
 
 	if (sdata->vif.type != NL80211_IFTYPE_NAN)
@@ -276,15 +277,14 @@ static int ieee80211_add_nan_func(struct wiphy *wiphy,
 
 	spin_lock_bh(&sdata->u.nan.func_lock);
 
-	ret = idr_alloc(&sdata->u.nan.function_inst_ids,
-			nan_func, 1, sdata->local->hw.max_nan_de_entries + 1,
-			GFP_ATOMIC);
+	ret = idr_alloc(&sdata->u.nan.function_inst_ids, nan_func, &idr_index,
+			1, sdata->local->hw.max_nan_de_entries + 1, GFP_ATOMIC);
 	spin_unlock_bh(&sdata->u.nan.func_lock);
 
-	if (ret < 0)
+	if (ret)
 		return ret;
 
-	nan_func->instance_id = ret;
+	nan_func->instance_id = idr_index;
 
 	WARN_ON(nan_func->instance_id == 0);
 
@@ -304,7 +304,7 @@ static int ieee80211_add_nan_func(struct wiphy *wiphy,
 				  u64 cookie)
 {
 	struct cfg80211_nan_func *func;
-	int id;
+	unsigned long id;
 
 	lockdep_assert_held(&sdata->u.nan.func_lock);
 
@@ -3266,23 +3266,24 @@ int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
 {
 	unsigned long spin_flags;
 	struct sk_buff *ack_skb;
-	int id;
+	unsigned long idr_index;
+	int ret;
 
 	ack_skb = skb_copy(skb, gfp);
 	if (!ack_skb)
 		return -ENOMEM;
 
 	spin_lock_irqsave(&local->ack_status_lock, spin_flags);
-	id = idr_alloc(&local->ack_status_frames, ack_skb,
-		       1, 0x10000, GFP_ATOMIC);
+	ret = idr_alloc(&local->ack_status_frames, ack_skb, &idr_index,
+			1, 0x10000, GFP_ATOMIC);
 	spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
 
-	if (id < 0) {
+	if (ret) {
 		kfree_skb(ack_skb);
 		return -ENOMEM;
 	}
 
-	IEEE80211_SKB_CB(skb)->ack_frame_id = id;
+	IEEE80211_SKB_CB(skb)->ack_frame_id = idr_index;
 
 	*cookie = ieee80211_mgmt_tx_cookie(local);
 	IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 9228ac7..517421c 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -797,11 +797,12 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 	unsigned long flags;
 	struct sk_buff *skb, *tmp;
 	u32 hw_reconf_flags = 0;
-	int i, flushed;
+	int flushed;
 	struct ps_data *ps;
 	struct cfg80211_chan_def chandef;
 	bool cancel_scan;
 	struct cfg80211_nan_func *func;
+	unsigned long i;
 
 	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 8aa1f5b..4195df2 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1209,7 +1209,7 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
 }
 EXPORT_SYMBOL(ieee80211_unregister_hw);
 
-static int ieee80211_free_ack_frame(int id, void *p, void *data)
+static int ieee80211_free_ack_frame(unsigned long id, void *p, void *data)
 {
 	WARN_ONCE(1, "Have pending ack frames!\n");
 	kfree_skb(p);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 8858f4f..7aa02b6 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2373,6 +2373,7 @@ static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_chanctx_conf *chanctx_conf;
 	struct ieee80211_sub_if_data *ap_sdata;
 	enum nl80211_band band;
+	unsigned long idr_index;
 	int ret;
 
 	if (IS_ERR(sta))
@@ -2623,11 +2624,11 @@ static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
 
 			spin_lock_irqsave(&local->ack_status_lock, flags);
 			id = idr_alloc(&local->ack_status_frames, ack_skb,
-				       1, 0x10000, GFP_ATOMIC);
+				       &idr_index, 1, 0x10000, GFP_ATOMIC);
 			spin_unlock_irqrestore(&local->ack_status_lock, flags);
 
-			if (id >= 0) {
-				info_id = id;
+			if (id == 0) {
+				info_id = idr_index;
 				info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
 			} else {
 				kfree_skb(ack_skb);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 259698d..4af5d5e 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1755,7 +1755,8 @@ static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
 {
 	struct cfg80211_nan_func *func, **funcs;
-	int res, id, i = 0;
+	int res, i = 0;
+	unsigned long id;
 
 	res = drv_start_nan(sdata->local, sdata,
 			    &sdata->u.nan.conf);
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 10f8b4c..76f0bc4 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -97,7 +97,7 @@ static const struct genl_family *genl_family_find_byid(unsigned int id)
 static const struct genl_family *genl_family_find_byname(char *name)
 {
 	const struct genl_family *family;
-	unsigned int id;
+	unsigned long id;
 
 	idr_for_each_entry(&genl_fam_idr, family, id)
 		if (strcmp(family->name, name) == 0)
@@ -322,6 +322,7 @@ int genl_register_family(struct genl_family *family)
 {
 	int err, i;
 	int start = GENL_START_ALLOC, end = GENL_MAX_ID;
+	unsigned long idr_index;
 
 	err = genl_validate_ops(family);
 	if (err)
@@ -360,12 +361,11 @@ int genl_register_family(struct genl_family *family)
 	} else
 		family->attrbuf = NULL;
 
-	family->id = idr_alloc(&genl_fam_idr, family,
-			       start, end + 1, GFP_KERNEL);
-	if (family->id < 0) {
-		err = family->id;
+	err = idr_alloc(&genl_fam_idr, family, &idr_index,
+			start, end + 1, GFP_KERNEL);
+	if (err)
 		goto errout_locked;
-	}
+	family->id = idr_index;
 
 	err = genl_validate_assign_mc_groups(family);
 	if (err)
@@ -775,7 +775,7 @@ static int ctrl_dumpfamily(struct sk_buff *skb, struct netlink_callback *cb)
 	struct genl_family *rt;
 	struct net *net = sock_net(skb->sk);
 	int fams_to_skip = cb->args[0];
-	unsigned int id;
+	unsigned long id;
 
 	idr_for_each_entry(&genl_fam_idr, rt, id) {
 		if (!rt->netnsok && !net_eq(net, &init_net))
@@ -961,7 +961,7 @@ static int genl_bind(struct net *net, int group)
 {
 	struct genl_family *f;
 	int err = -ENOENT;
-	unsigned int id;
+	unsigned long id;
 
 	down_read(&cb_lock);
 
@@ -987,7 +987,7 @@ static int genl_bind(struct net *net, int group)
 static void genl_unbind(struct net *net, int group)
 {
 	struct genl_family *f;
-	unsigned int id;
+	unsigned long id;
 
 	down_read(&cb_lock);
 
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index c2f5c13..939ee02 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -498,28 +498,31 @@ static void qrtr_port_remove(struct qrtr_sock *ipc)
 static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
 {
 	int rc;
+	unsigned long idr_index;
 
 	mutex_lock(&qrtr_port_lock);
 	if (!*port) {
-		rc = idr_alloc(&qrtr_ports, ipc,
+		rc = idr_alloc(&qrtr_ports, ipc, &idr_index,
 			       QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1,
 			       GFP_ATOMIC);
-		if (rc >= 0)
-			*port = rc;
+		if (rc == 0)
+			*port = idr_index;
 	} else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
 		rc = -EACCES;
 	} else if (*port == QRTR_PORT_CTRL) {
-		rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC);
+		rc = idr_alloc(&qrtr_ports, ipc, NULL, 0, 1,
+			       GFP_ATOMIC);
 	} else {
-		rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC);
-		if (rc >= 0)
-			*port = rc;
+		rc = idr_alloc(&qrtr_ports, ipc, &idr_index, *port,
+			       *port + 1, GFP_ATOMIC);
+		if (rc == 0)
+			*port = idr_index;
 	}
 	mutex_unlock(&qrtr_port_lock);
 
 	if (rc == -ENOSPC)
 		return -EADDRINUSE;
-	else if (rc < 0)
+	else if (rc)
 		return rc;
 
 	sock_hold(&ipc->sk);
@@ -531,7 +534,7 @@ static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
 static void qrtr_reset_ports(void)
 {
 	struct qrtr_sock *ipc;
-	int id;
+	unsigned long id;
 
 	mutex_lock(&qrtr_port_lock);
 	idr_for_each_entry(&qrtr_ports, ipc, id) {
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c
index eb21576..8f49e9c 100644
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -106,16 +106,17 @@ static int rxrpc_get_client_connection_id(struct rxrpc_connection *conn,
 					  gfp_t gfp)
 {
 	struct rxrpc_net *rxnet = conn->params.local->rxnet;
-	int id;
+	unsigned long id;
+	int ret;
 
 	_enter("");
 
 	idr_preload(gfp);
 	spin_lock(&rxrpc_conn_id_lock);
 
-	id = idr_alloc_cyclic(&rxrpc_client_conn_ids, conn,
-			      1, 0x40000000, GFP_NOWAIT);
-	if (id < 0)
+	ret = idr_alloc_cyclic(&rxrpc_client_conn_ids, conn, &id,
+			       1, 0x40000000, GFP_NOWAIT);
+	if (ret)
 		goto error;
 
 	spin_unlock(&rxrpc_conn_id_lock);
@@ -130,8 +131,8 @@ static int rxrpc_get_client_connection_id(struct rxrpc_connection *conn,
 error:
 	spin_unlock(&rxrpc_conn_id_lock);
 	idr_preload_end();
-	_leave(" = %d", id);
-	return id;
+	_leave(" = %d", ret);
+	return ret;
 }
 
 /*
@@ -153,7 +154,7 @@ static void rxrpc_put_client_connection_id(struct rxrpc_connection *conn)
 void rxrpc_destroy_client_conn_ids(void)
 {
 	struct rxrpc_connection *conn;
-	int id;
+	unsigned long id;
 
 	if (!idr_is_empty(&rxrpc_client_conn_ids)) {
 		idr_for_each_entry(&rxrpc_client_conn_ids, conn, id) {
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index dfb9651..c3086c1 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1613,6 +1613,7 @@ int sctp_assoc_lookup_laddr(struct sctp_association *asoc,
 int sctp_assoc_set_id(struct sctp_association *asoc, gfp_t gfp)
 {
 	bool preload = gfpflags_allow_blocking(gfp);
+	unsigned long idr_index;
 	int ret;
 
 	/* If the id is already assigned, keep it. */
@@ -1623,14 +1624,15 @@ int sctp_assoc_set_id(struct sctp_association *asoc, gfp_t gfp)
 		idr_preload(gfp);
 	spin_lock_bh(&sctp_assocs_id_lock);
 	/* 0 is not a valid assoc_id, must be >= 1 */
-	ret = idr_alloc_cyclic(&sctp_assocs_id, asoc, 1, 0, GFP_NOWAIT);
+	ret = idr_alloc_cyclic(&sctp_assocs_id, asoc, &idr_index, 1, 0,
+			       GFP_NOWAIT);
 	spin_unlock_bh(&sctp_assocs_id_lock);
 	if (preload)
 		idr_preload_end();
-	if (ret < 0)
+	if (ret)
 		return ret;
 
-	asoc->assoc_id = (sctp_assoc_t)ret;
+	asoc->assoc_id = (sctp_assoc_t)idr_index;
 	return 0;
 }
 
diff --git a/net/tipc/server.c b/net/tipc/server.c
index 3cd6402..9c83545 100644
--- a/net/tipc/server.c
+++ b/net/tipc/server.c
@@ -216,6 +216,7 @@ static void tipc_close_conn(struct tipc_conn *con)
 static struct tipc_conn *tipc_alloc_conn(struct tipc_server *s)
 {
 	struct tipc_conn *con;
+	unsigned long idr_index;
 	int ret;
 
 	con = kzalloc(sizeof(struct tipc_conn), GFP_ATOMIC);
@@ -229,13 +230,13 @@ static struct tipc_conn *tipc_alloc_conn(struct tipc_server *s)
 	INIT_WORK(&con->rwork, tipc_recv_work);
 
 	spin_lock_bh(&s->idr_lock);
-	ret = idr_alloc(&s->conn_idr, con, 0, 0, GFP_ATOMIC);
-	if (ret < 0) {
+	ret = idr_alloc(&s->conn_idr, con, &idr_index, 0, 0, GFP_ATOMIC);
+	if (ret) {
 		kfree(con);
 		spin_unlock_bh(&s->idr_lock);
 		return ERR_PTR(-ENOMEM);
 	}
-	con->conid = ret;
+	con->conid = idr_index;
 	s->idr_in_use++;
 	spin_unlock_bh(&s->idr_lock);
 
-- 
1.8.3.1


------------------------------------------------------------------------------
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^ permalink raw reply	[flat|nested] 6+ messages in thread

* [patch net-next 2/3] net/sched: Change cls_flower to use IDR
       [not found] ` <1502849538-14284-1-git-send-email-chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
  2017-08-16  2:12   ` [patch net-next 1/3] idr: Use unsigned long instead of int Chris Mi
@ 2017-08-16  2:12   ` Chris Mi
  2017-08-16  2:12   ` [patch net-next 3/3] net/sched: Change act_api and act_xxx modules " Chris Mi
  2017-08-16  7:49   ` [patch net-next 0/3] net/sched: Improve getting objects by indexes Christian König
  3 siblings, 0 replies; 6+ messages in thread
From: Chris Mi @ 2017-08-16  2:12 UTC (permalink / raw)
  To: netdev-u79uwXL29TY76Z2rM5mHXA
  Cc: lucho-OnYtXJJ0/fesTnJN9+BGXg,
	sergey.senozhatsky.work-Re5JQEeQqe8AvxtiuMwx3w,
	snitzer-H+wXaHxf7aLQT0dZR+AlfA, wsa-z923LK4zBo2bacvFa/9K2g,
	markb-VPRAkNaXOzVWk0Htik3J/w, tom.leiming-Re5JQEeQqe8AvxtiuMwx3w,
	stefanr-MtYdepGKPcBMYopoZt5u/LNAH6kLmebB,
	zhi.a.wang-ral2JQCrhuEAvxtiuMwx3w, nsekhar-l0cyMroinI0,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	bfields-uC3wQj2KruNg9hUCZPvPmw,
	linux-sctp-u79uwXL29TY76Z2rM5mHXA, paulus-eUNUBHrolfbYtjvyW6yDsg,
	jinpu.wang-EIkl63zCoXaH+58JC4qpiA, pshelar-LZ6Gd1LRuIk,
	sumit.semwal-QSEj5FYQhm4dnm+yROfE0A, AlexBin.Xie-5C7GfCeVMHo,
	david1.zhou-5C7GfCeVMHo,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
	maximlevitsky-Re5JQEeQqe8AvxtiuMwx3w,
	sudarsana.kalluru-h88ZbnxC6KDQT0dZR+AlfA,
	marek.vasut-Re5JQEeQqe8AvxtiuMwx3w,
	linux-atm-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	dtwlin-Re5JQEeQqe8AvxtiuMwx3w, michel.daenzer-5C7GfCeVMHo,
	dledford-H+wXaHxf7aLQT0dZR+AlfA,
	tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
	longman-H+wXaHxf7aLQT0dZR+AlfA,
	niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w,
	philipp.reisner-63ez5xqkn6DQT0dZR+AlfA,
	shli-DgEjT+Ai2ygdnm+yROfE0A, linux-0h96xk9xTtrk1uMJSBkQmQ,
	ohad-Ix1uc/W3ht7QT0dZR+AlfA, pmladek-IBi9RG/b67k,
	dick.kennedy-dY08KVG/lbpWk0Htik3J/w

Currently, all filters with the same priority are linked in a doubly
linked list. Every filter should have a unique handle. To make the
handle unique, we need to iterate the list every time to see if the
handle exists or not when inserting a new filter. It is time-consuming.
For example, it takes about 5m3.169s to insert 64K rules.

This patch changes cls_flower to use IDR. With this patch, it
takes about 0m1.127s to insert 64K rules. The improvement is huge.

But please note that in this testing, all filters share the same action.
If every filter has a unique action, that is another bottleneck.
Follow-up patch in this patchset addresses that.

Signed-off-by: Chris Mi <chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Jiri Pirko <jiri-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
 net/sched/cls_flower.c | 55 +++++++++++++++++++++-----------------------------
 1 file changed, 23 insertions(+), 32 deletions(-)

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 052e902..071f0ef 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -68,7 +68,6 @@ struct cls_fl_head {
 	struct rhashtable ht;
 	struct fl_flow_mask mask;
 	struct flow_dissector dissector;
-	u32 hgen;
 	bool mask_assigned;
 	struct list_head filters;
 	struct rhashtable_params ht_params;
@@ -76,6 +75,7 @@ struct cls_fl_head {
 		struct work_struct work;
 		struct rcu_head	rcu;
 	};
+	struct idr handle_idr;
 };
 
 struct cls_fl_filter {
@@ -210,6 +210,7 @@ static int fl_init(struct tcf_proto *tp)
 
 	INIT_LIST_HEAD_RCU(&head->filters);
 	rcu_assign_pointer(tp->root, head);
+	idr_init(&head->handle_idr);
 
 	return 0;
 }
@@ -295,6 +296,9 @@ static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 
 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
 {
+	struct cls_fl_head *head = rtnl_dereference(tp->root);
+
+	idr_remove(&head->handle_idr, f->handle);
 	list_del_rcu(&f->list);
 	if (!tc_skip_hw(f->flags))
 		fl_hw_destroy_filter(tp, f);
@@ -327,6 +331,7 @@ static void fl_destroy(struct tcf_proto *tp)
 
 	list_for_each_entry_safe(f, next, &head->filters, list)
 		__fl_delete(tp, f);
+	idr_destroy(&head->handle_idr);
 
 	__module_get(THIS_MODULE);
 	call_rcu(&head->rcu, fl_destroy_rcu);
@@ -335,12 +340,8 @@ static void fl_destroy(struct tcf_proto *tp)
 static void *fl_get(struct tcf_proto *tp, u32 handle)
 {
 	struct cls_fl_head *head = rtnl_dereference(tp->root);
-	struct cls_fl_filter *f;
 
-	list_for_each_entry(f, &head->filters, list)
-		if (f->handle == handle)
-			return f;
-	return NULL;
+	return idr_find(&head->handle_idr, handle);
 }
 
 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
@@ -859,27 +860,6 @@ static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 	return 0;
 }
 
-static u32 fl_grab_new_handle(struct tcf_proto *tp,
-			      struct cls_fl_head *head)
-{
-	unsigned int i = 0x80000000;
-	u32 handle;
-
-	do {
-		if (++head->hgen == 0x7FFFFFFF)
-			head->hgen = 1;
-	} while (--i > 0 && fl_get(tp, head->hgen));
-
-	if (unlikely(i == 0)) {
-		pr_err("Insufficient number of handles\n");
-		handle = 0;
-	} else {
-		handle = head->hgen;
-	}
-
-	return handle;
-}
-
 static int fl_change(struct net *net, struct sk_buff *in_skb,
 		     struct tcf_proto *tp, unsigned long base,
 		     u32 handle, struct nlattr **tca,
@@ -890,6 +870,7 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 	struct cls_fl_filter *fnew;
 	struct nlattr **tb;
 	struct fl_flow_mask mask = {};
+	unsigned long idr_index;
 	int err;
 
 	if (!tca[TCA_OPTIONS])
@@ -920,13 +901,21 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 		goto errout;
 
 	if (!handle) {
-		handle = fl_grab_new_handle(tp, head);
-		if (!handle) {
-			err = -EINVAL;
+		err = idr_alloc(&head->handle_idr, fnew, &idr_index,
+				1, 0x80000000, GFP_KERNEL);
+		if (err)
 			goto errout;
-		}
+		fnew->handle = idr_index;
+	}
+
+	/* user specifies a handle and it doesn't exist */
+	if (handle && !fold) {
+		err = idr_alloc(&head->handle_idr, fnew, &idr_index,
+				handle, handle + 1, GFP_KERNEL);
+		if (err)
+			goto errout;
+		fnew->handle = idr_index;
 	}
-	fnew->handle = handle;
 
 	if (tb[TCA_FLOWER_FLAGS]) {
 		fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
@@ -980,6 +969,8 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 	*arg = fnew;
 
 	if (fold) {
+		fnew->handle = handle;
+		idr_replace(&head->handle_idr, fnew, fnew->handle);
 		list_replace_rcu(&fold->list, &fnew->list);
 		tcf_unbind_filter(tp, &fold->res);
 		call_rcu(&fold->rcu, fl_destroy_filter);
-- 
1.8.3.1


------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot

^ permalink raw reply	[flat|nested] 6+ messages in thread

* [patch net-next 3/3] net/sched: Change act_api and act_xxx modules to use IDR
       [not found] ` <1502849538-14284-1-git-send-email-chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
  2017-08-16  2:12   ` [patch net-next 1/3] idr: Use unsigned long instead of int Chris Mi
  2017-08-16  2:12   ` [patch net-next 2/3] net/sched: Change cls_flower to use IDR Chris Mi
@ 2017-08-16  2:12   ` Chris Mi
  2017-08-16  7:49   ` [patch net-next 0/3] net/sched: Improve getting objects by indexes Christian König
  3 siblings, 0 replies; 6+ messages in thread
From: Chris Mi @ 2017-08-16  2:12 UTC (permalink / raw)
  To: netdev-u79uwXL29TY76Z2rM5mHXA
  Cc: lucho-OnYtXJJ0/fesTnJN9+BGXg,
	sergey.senozhatsky.work-Re5JQEeQqe8AvxtiuMwx3w,
	snitzer-H+wXaHxf7aLQT0dZR+AlfA, wsa-z923LK4zBo2bacvFa/9K2g,
	markb-VPRAkNaXOzVWk0Htik3J/w, tom.leiming-Re5JQEeQqe8AvxtiuMwx3w,
	stefanr-MtYdepGKPcBMYopoZt5u/LNAH6kLmebB,
	zhi.a.wang-ral2JQCrhuEAvxtiuMwx3w, nsekhar-l0cyMroinI0,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	bfields-uC3wQj2KruNg9hUCZPvPmw,
	linux-sctp-u79uwXL29TY76Z2rM5mHXA, paulus-eUNUBHrolfbYtjvyW6yDsg,
	jinpu.wang-EIkl63zCoXaH+58JC4qpiA, pshelar-LZ6Gd1LRuIk,
	sumit.semwal-QSEj5FYQhm4dnm+yROfE0A, AlexBin.Xie-5C7GfCeVMHo,
	david1.zhou-5C7GfCeVMHo,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
	maximlevitsky-Re5JQEeQqe8AvxtiuMwx3w,
	sudarsana.kalluru-h88ZbnxC6KDQT0dZR+AlfA,
	marek.vasut-Re5JQEeQqe8AvxtiuMwx3w,
	linux-atm-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	dtwlin-Re5JQEeQqe8AvxtiuMwx3w, michel.daenzer-5C7GfCeVMHo,
	dledford-H+wXaHxf7aLQT0dZR+AlfA,
	tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
	longman-H+wXaHxf7aLQT0dZR+AlfA,
	niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w,
	philipp.reisner-63ez5xqkn6DQT0dZR+AlfA,
	shli-DgEjT+Ai2ygdnm+yROfE0A, linux-0h96xk9xTtrk1uMJSBkQmQ,
	ohad-Ix1uc/W3ht7QT0dZR+AlfA, pmladek-IBi9RG/b67k,
	dick.kennedy-dY08KVG/lbpWk0Htik3J/w

Typically, each TC filter has its own action. All the actions of the
same type are saved in its hash table. But the hash buckets are too
small that it degrades to a list. And the performance is greatly
affected. For example, it takes about 0m11.914s to insert 64K rules.
If we convert the hash table to IDR, it only takes about 0m1.500s.
The improvement is huge.

But please note that the test result is based on previous patch that
cls_flower uses IDR.

Signed-off-by: Chris Mi <chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Jiri Pirko <jiri-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
 include/net/act_api.h      |  76 +++++---------
 net/sched/act_api.c        | 249 ++++++++++++++++++++++-----------------------
 net/sched/act_bpf.c        |  17 ++--
 net/sched/act_connmark.c   |  16 ++-
 net/sched/act_csum.c       |  16 ++-
 net/sched/act_gact.c       |  16 ++-
 net/sched/act_ife.c        |  20 ++--
 net/sched/act_ipt.c        |  26 +++--
 net/sched/act_mirred.c     |  19 ++--
 net/sched/act_nat.c        |  16 ++-
 net/sched/act_pedit.c      |  18 ++--
 net/sched/act_police.c     |  18 ++--
 net/sched/act_sample.c     |  17 ++--
 net/sched/act_simple.c     |  20 ++--
 net/sched/act_skbedit.c    |  18 ++--
 net/sched/act_skbmod.c     |  18 ++--
 net/sched/act_tunnel_key.c |  20 ++--
 net/sched/act_vlan.c       |  22 ++--
 18 files changed, 277 insertions(+), 345 deletions(-)

diff --git a/include/net/act_api.h b/include/net/act_api.h
index 26ffd83..8f3d5d8 100644
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -10,12 +10,9 @@
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
 
-
-struct tcf_hashinfo {
-	struct hlist_head	*htab;
-	unsigned int		hmask;
-	spinlock_t		lock;
-	u32			index;
+struct tcf_idrinfo {
+	spinlock_t	lock;
+	struct idr	action_idr;
 };
 
 struct tc_action_ops;
@@ -25,9 +22,8 @@ struct tc_action {
 	__u32				type; /* for backward compat(TCA_OLD_COMPAT) */
 	__u32				order;
 	struct list_head		list;
-	struct tcf_hashinfo		*hinfo;
+	struct tcf_idrinfo		*idrinfo;
 
-	struct hlist_node		tcfa_head;
 	u32				tcfa_index;
 	int				tcfa_refcnt;
 	int				tcfa_bindcnt;
@@ -44,7 +40,6 @@ struct tc_action {
 	struct tc_cookie	*act_cookie;
 	struct tcf_chain	*goto_chain;
 };
-#define tcf_head	common.tcfa_head
 #define tcf_index	common.tcfa_index
 #define tcf_refcnt	common.tcfa_refcnt
 #define tcf_bindcnt	common.tcfa_bindcnt
@@ -57,27 +52,6 @@ struct tc_action {
 #define tcf_lock	common.tcfa_lock
 #define tcf_rcu		common.tcfa_rcu
 
-static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
-{
-	return index & hmask;
-}
-
-static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
-{
-	int i;
-
-	spin_lock_init(&hf->lock);
-	hf->index = 0;
-	hf->hmask = mask;
-	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
-			   GFP_KERNEL);
-	if (!hf->htab)
-		return -ENOMEM;
-	for (i = 0; i < mask + 1; i++)
-		INIT_HLIST_HEAD(&hf->htab[i]);
-	return 0;
-}
-
 /* Update lastuse only if needed, to avoid dirtying a cache line.
  * We use a temp variable to avoid fetching jiffies twice.
  */
@@ -126,53 +100,51 @@ struct tc_action_ops {
 };
 
 struct tc_action_net {
-	struct tcf_hashinfo *hinfo;
+	struct tcf_idrinfo *idrinfo;
 	const struct tc_action_ops *ops;
 };
 
 static inline
 int tc_action_net_init(struct tc_action_net *tn,
-		       const struct tc_action_ops *ops, unsigned int mask)
+		       const struct tc_action_ops *ops)
 {
 	int err = 0;
 
-	tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
-	if (!tn->hinfo)
+	tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
+	if (!tn->idrinfo)
 		return -ENOMEM;
 	tn->ops = ops;
-	err = tcf_hashinfo_init(tn->hinfo, mask);
-	if (err)
-		kfree(tn->hinfo);
+	spin_lock_init(&tn->idrinfo->lock);
+	idr_init(&tn->idrinfo->action_idr);
 	return err;
 }
 
-void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
-			  struct tcf_hashinfo *hinfo);
+void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
+			 struct tcf_idrinfo *idrinfo);
 
 static inline void tc_action_net_exit(struct tc_action_net *tn)
 {
-	tcf_hashinfo_destroy(tn->ops, tn->hinfo);
-	kfree(tn->hinfo);
+	tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
+	kfree(tn->idrinfo);
 }
 
 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
 		       struct netlink_callback *cb, int type,
 		       const struct tc_action_ops *ops);
-int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
-u32 tcf_hash_new_index(struct tc_action_net *tn);
-bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
+int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
+bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
 		    int bind);
-int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
-		    struct tc_action **a, const struct tc_action_ops *ops, int bind,
-		    bool cpustats);
-void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
-void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
+int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
+		   struct tc_action **a, const struct tc_action_ops *ops,
+		   int bind, bool cpustats);
+void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est);
+void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
 
-int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
+int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
 
-static inline int tcf_hash_release(struct tc_action *a, bool bind)
+static inline int tcf_idr_release(struct tc_action *a, bool bind)
 {
-	return __tcf_hash_release(a, bind, false);
+	return __tcf_idr_release(a, bind, false);
 }
 
 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 02fcb0c..7a10a90 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -70,11 +70,11 @@ static void free_tcf(struct rcu_head *head)
 	kfree(p);
 }
 
-static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *p)
+static void tcf_idr_remove(struct tcf_idrinfo *idrinfo, struct tc_action *p)
 {
-	spin_lock_bh(&hinfo->lock);
-	hlist_del(&p->tcfa_head);
-	spin_unlock_bh(&hinfo->lock);
+	spin_lock_bh(&idrinfo->lock);
+	idr_remove(&idrinfo->action_idr, p->tcfa_index);
+	spin_unlock_bh(&idrinfo->lock);
 	gen_kill_estimator(&p->tcfa_rate_est);
 	/*
 	 * gen_estimator est_timer() might access p->tcfa_lock
@@ -83,7 +83,7 @@ static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *p)
 	call_rcu(&p->tcfa_rcu, free_tcf);
 }
 
-int __tcf_hash_release(struct tc_action *p, bool bind, bool strict)
+int __tcf_idr_release(struct tc_action *p, bool bind, bool strict)
 {
 	int ret = 0;
 
@@ -97,64 +97,60 @@ int __tcf_hash_release(struct tc_action *p, bool bind, bool strict)
 		if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) {
 			if (p->ops->cleanup)
 				p->ops->cleanup(p, bind);
-			tcf_hash_destroy(p->hinfo, p);
+			tcf_idr_remove(p->idrinfo, p);
 			ret = ACT_P_DELETED;
 		}
 	}
 
 	return ret;
 }
-EXPORT_SYMBOL(__tcf_hash_release);
+EXPORT_SYMBOL(__tcf_idr_release);
 
-static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
+static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
 			   struct netlink_callback *cb)
 {
-	int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
+	int err = 0, index = -1, s_i = 0, n_i = 0;
 	u32 act_flags = cb->args[2];
 	unsigned long jiffy_since = cb->args[3];
 	struct nlattr *nest;
+	struct idr *idr = &idrinfo->action_idr;
+	struct tc_action *p;
+	unsigned long id = 1;
 
-	spin_lock_bh(&hinfo->lock);
+	spin_lock_bh(&idrinfo->lock);
 
 	s_i = cb->args[0];
 
-	for (i = 0; i < (hinfo->hmask + 1); i++) {
-		struct hlist_head *head;
-		struct tc_action *p;
-
-		head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
-
-		hlist_for_each_entry_rcu(p, head, tcfa_head) {
-			index++;
-			if (index < s_i)
-				continue;
-
-			if (jiffy_since &&
-			    time_after(jiffy_since,
-				       (unsigned long)p->tcfa_tm.lastuse))
-				continue;
-
-			nest = nla_nest_start(skb, n_i);
-			if (nest == NULL)
-				goto nla_put_failure;
-			err = tcf_action_dump_1(skb, p, 0, 0);
-			if (err < 0) {
-				index--;
-				nlmsg_trim(skb, nest);
-				goto done;
-			}
-			nla_nest_end(skb, nest);
-			n_i++;
-			if (!(act_flags & TCA_FLAG_LARGE_DUMP_ON) &&
-			    n_i >= TCA_ACT_MAX_PRIO)
-				goto done;
+	idr_for_each_entry(idr, p, id) {
+		index++;
+		if (index < s_i)
+			continue;
+
+		if (jiffy_since &&
+		    time_after(jiffy_since,
+			       (unsigned long)p->tcfa_tm.lastuse))
+			continue;
+
+		nest = nla_nest_start(skb, n_i);
+		if (!nest)
+			goto nla_put_failure;
+		err = tcf_action_dump_1(skb, p, 0, 0);
+		if (err < 0) {
+			index--;
+			nlmsg_trim(skb, nest);
+			goto done;
 		}
+		nla_nest_end(skb, nest);
+		n_i++;
+		if (!(act_flags & TCA_FLAG_LARGE_DUMP_ON) &&
+		    n_i >= TCA_ACT_MAX_PRIO)
+			goto done;
 	}
 done:
 	if (index >= 0)
 		cb->args[0] = index + 1;
 
-	spin_unlock_bh(&hinfo->lock);
+	spin_unlock_bh(&idrinfo->lock);
 	if (n_i) {
 		if (act_flags & TCA_FLAG_LARGE_DUMP_ON)
 			cb->args[1] = n_i;
@@ -166,31 +162,29 @@ static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
 	goto done;
 }
 
-static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
+static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
 			  const struct tc_action_ops *ops)
 {
 	struct nlattr *nest;
-	int i = 0, n_i = 0;
+	int n_i = 0;
 	int ret = -EINVAL;
+	struct idr *idr = &idrinfo->action_idr;
+	struct tc_action *p;
+	unsigned long id = 1;
 
 	nest = nla_nest_start(skb, 0);
 	if (nest == NULL)
 		goto nla_put_failure;
 	if (nla_put_string(skb, TCA_KIND, ops->kind))
 		goto nla_put_failure;
-	for (i = 0; i < (hinfo->hmask + 1); i++) {
-		struct hlist_head *head;
-		struct hlist_node *n;
-		struct tc_action *p;
-
-		head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
-		hlist_for_each_entry_safe(p, n, head, tcfa_head) {
-			ret = __tcf_hash_release(p, false, true);
-			if (ret == ACT_P_DELETED) {
-				module_put(p->ops->owner);
-				n_i++;
-			} else if (ret < 0)
-				goto nla_put_failure;
+
+	idr_for_each_entry(idr, p, id) {
+		ret = __tcf_idr_release(p, false, true);
+		if (ret == ACT_P_DELETED) {
+			module_put(p->ops->owner);
+			n_i++;
+		} else if (ret < 0) {
+			goto nla_put_failure;
 		}
 	}
 	if (nla_put_u32(skb, TCA_FCNT, n_i))
@@ -207,12 +201,12 @@ int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
 		       struct netlink_callback *cb, int type,
 		       const struct tc_action_ops *ops)
 {
-	struct tcf_hashinfo *hinfo = tn->hinfo;
+	struct tcf_idrinfo *idrinfo = tn->idrinfo;
 
 	if (type == RTM_DELACTION) {
-		return tcf_del_walker(hinfo, skb, ops);
+		return tcf_del_walker(idrinfo, skb, ops);
 	} else if (type == RTM_GETACTION) {
-		return tcf_dump_walker(hinfo, skb, cb);
+		return tcf_dump_walker(idrinfo, skb, cb);
 	} else {
 		WARN(1, "tcf_generic_walker: unknown action %d\n", type);
 		return -EINVAL;
@@ -220,40 +214,21 @@ int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
 }
 EXPORT_SYMBOL(tcf_generic_walker);
 
-static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
+static struct tc_action *tcf_idr_lookup(u32 index, struct tcf_idrinfo *idrinfo)
 {
 	struct tc_action *p = NULL;
-	struct hlist_head *head;
 
-	spin_lock_bh(&hinfo->lock);
-	head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
-	hlist_for_each_entry_rcu(p, head, tcfa_head)
-		if (p->tcfa_index == index)
-			break;
-	spin_unlock_bh(&hinfo->lock);
+	spin_lock_bh(&idrinfo->lock);
+	p = idr_find(&idrinfo->action_idr, index);
+	spin_unlock_bh(&idrinfo->lock);
 
 	return p;
 }
 
-u32 tcf_hash_new_index(struct tc_action_net *tn)
-{
-	struct tcf_hashinfo *hinfo = tn->hinfo;
-	u32 val = hinfo->index;
-
-	do {
-		if (++val == 0)
-			val = 1;
-	} while (tcf_hash_lookup(val, hinfo));
-
-	hinfo->index = val;
-	return val;
-}
-EXPORT_SYMBOL(tcf_hash_new_index);
-
-int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
+int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
 {
-	struct tcf_hashinfo *hinfo = tn->hinfo;
-	struct tc_action *p = tcf_hash_lookup(index, hinfo);
+	struct tcf_idrinfo *idrinfo = tn->idrinfo;
+	struct tc_action *p = tcf_idr_lookup(index, idrinfo);
 
 	if (p) {
 		*a = p;
@@ -261,15 +236,15 @@ int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
 	}
 	return 0;
 }
-EXPORT_SYMBOL(tcf_hash_search);
+EXPORT_SYMBOL(tcf_idr_search);
 
-bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
-		    int bind)
+bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
+		   int bind)
 {
-	struct tcf_hashinfo *hinfo = tn->hinfo;
-	struct tc_action *p = NULL;
+	struct tcf_idrinfo *idrinfo = tn->idrinfo;
+	struct tc_action *p = tcf_idr_lookup(index, idrinfo);
 
-	if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
+	if (index && p) {
 		if (bind)
 			p->tcfa_bindcnt++;
 		p->tcfa_refcnt++;
@@ -278,23 +253,25 @@ bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
 	}
 	return false;
 }
-EXPORT_SYMBOL(tcf_hash_check);
+EXPORT_SYMBOL(tcf_idr_check);
 
-void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
+void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est)
 {
 	if (est)
 		gen_kill_estimator(&a->tcfa_rate_est);
 	call_rcu(&a->tcfa_rcu, free_tcf);
 }
-EXPORT_SYMBOL(tcf_hash_cleanup);
+EXPORT_SYMBOL(tcf_idr_cleanup);
 
-int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
-		    struct tc_action **a, const struct tc_action_ops *ops,
-		    int bind, bool cpustats)
+int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
+		   struct tc_action **a, const struct tc_action_ops *ops,
+		   int bind, bool cpustats)
 {
 	struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
-	struct tcf_hashinfo *hinfo = tn->hinfo;
+	struct tcf_idrinfo *idrinfo = tn->idrinfo;
+	struct idr *idr = &idrinfo->action_idr;
 	int err = -ENOMEM;
+	unsigned long idr_index;
 
 	if (unlikely(!p))
 		return -ENOMEM;
@@ -317,8 +294,26 @@ int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
 		}
 	}
 	spin_lock_init(&p->tcfa_lock);
-	INIT_HLIST_NODE(&p->tcfa_head);
-	p->tcfa_index = index ? index : tcf_hash_new_index(tn);
+	/* user doesn't specify an index */
+	if (!index) {
+		spin_lock_bh(&idrinfo->lock);
+		err = idr_alloc(idr, NULL, &idr_index, 1, 0, GFP_KERNEL);
+		spin_unlock_bh(&idrinfo->lock);
+		if (err) {
+err3:
+			free_percpu(p->cpu_qstats);
+			goto err2;
+		}
+		p->tcfa_index = idr_index;
+	} else {
+		spin_lock_bh(&idrinfo->lock);
+		err = idr_alloc(idr, NULL, NULL, index, index + 1, GFP_KERNEL);
+		spin_unlock_bh(&idrinfo->lock);
+		if (err)
+			goto err3;
+		p->tcfa_index = index;
+	}
+
 	p->tcfa_tm.install = jiffies;
 	p->tcfa_tm.lastuse = jiffies;
 	p->tcfa_tm.firstuse = 0;
@@ -327,52 +322,46 @@ int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
 					&p->tcfa_rate_est,
 					&p->tcfa_lock, NULL, est);
 		if (err) {
-			free_percpu(p->cpu_qstats);
-			goto err2;
+			goto err3;
 		}
 	}
 
-	p->hinfo = hinfo;
+	p->idrinfo = idrinfo;
 	p->ops = ops;
 	INIT_LIST_HEAD(&p->list);
 	*a = p;
 	return 0;
 }
-EXPORT_SYMBOL(tcf_hash_create);
+EXPORT_SYMBOL(tcf_idr_create);
 
-void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
+void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a)
 {
-	struct tcf_hashinfo *hinfo = tn->hinfo;
-	unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask);
+	struct tcf_idrinfo *idrinfo = tn->idrinfo;
 
-	spin_lock_bh(&hinfo->lock);
-	hlist_add_head(&a->tcfa_head, &hinfo->htab[h]);
-	spin_unlock_bh(&hinfo->lock);
+	spin_lock_bh(&idrinfo->lock);
+	idr_replace(&idrinfo->action_idr, a, a->tcfa_index);
+	spin_unlock_bh(&idrinfo->lock);
 }
-EXPORT_SYMBOL(tcf_hash_insert);
+EXPORT_SYMBOL(tcf_idr_insert);
 
-void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
-			  struct tcf_hashinfo *hinfo)
+void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
+			 struct tcf_idrinfo *idrinfo)
 {
-	int i;
-
-	for (i = 0; i < hinfo->hmask + 1; i++) {
-		struct tc_action *p;
-		struct hlist_node *n;
-
-		hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) {
-			int ret;
+	struct idr *idr = &idrinfo->action_idr;
+	struct tc_action *p;
+	int ret;
+	unsigned long id = 1;
 
-			ret = __tcf_hash_release(p, false, true);
-			if (ret == ACT_P_DELETED)
-				module_put(ops->owner);
-			else if (ret < 0)
-				return;
-		}
+	idr_for_each_entry(idr, p, id) {
+		ret = __tcf_idr_release(p, false, true);
+		if (ret == ACT_P_DELETED)
+			module_put(ops->owner);
+		else if (ret < 0)
+			return;
 	}
-	kfree(hinfo->htab);
+	idr_destroy(&idrinfo->action_idr);
 }
-EXPORT_SYMBOL(tcf_hashinfo_destroy);
+EXPORT_SYMBOL(tcf_idrinfo_destroy);
 
 static LIST_HEAD(act_base);
 static DEFINE_RWLOCK(act_mod_lock);
@@ -524,7 +513,7 @@ int tcf_action_destroy(struct list_head *actions, int bind)
 	int ret = 0;
 
 	list_for_each_entry_safe(a, tmp, actions, list) {
-		ret = __tcf_hash_release(a, bind, true);
+		ret = __tcf_idr_release(a, bind, true);
 		if (ret == ACT_P_DELETED)
 			module_put(a->ops->owner);
 		else if (ret < 0)
diff --git a/net/sched/act_bpf.c b/net/sched/act_bpf.c
index 9afe133..c0c707e 100644
--- a/net/sched/act_bpf.c
+++ b/net/sched/act_bpf.c
@@ -21,7 +21,6 @@
 #include <linux/tc_act/tc_bpf.h>
 #include <net/tc_act/tc_bpf.h>
 
-#define BPF_TAB_MASK		15
 #define ACT_BPF_NAME_LEN	256
 
 struct tcf_bpf_cfg {
@@ -295,9 +294,9 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
 
 	parm = nla_data(tb[TCA_ACT_BPF_PARMS]);
 
-	if (!tcf_hash_check(tn, parm->index, act, bind)) {
-		ret = tcf_hash_create(tn, parm->index, est, act,
-				      &act_bpf_ops, bind, true);
+	if (!tcf_idr_check(tn, parm->index, act, bind)) {
+		ret = tcf_idr_create(tn, parm->index, est, act,
+				     &act_bpf_ops, bind, true);
 		if (ret < 0)
 			return ret;
 
@@ -307,7 +306,7 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
 		if (bind)
 			return 0;
 
-		tcf_hash_release(*act, bind);
+		tcf_idr_release(*act, bind);
 		if (!replace)
 			return -EEXIST;
 	}
@@ -343,7 +342,7 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
 	rcu_assign_pointer(prog->filter, cfg.filter);
 
 	if (res == ACT_P_CREATED) {
-		tcf_hash_insert(tn, *act);
+		tcf_idr_insert(tn, *act);
 	} else {
 		/* make sure the program being replaced is no longer executing */
 		synchronize_rcu();
@@ -353,7 +352,7 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
 	return res;
 out:
 	if (res == ACT_P_CREATED)
-		tcf_hash_cleanup(*act, est);
+		tcf_idr_cleanup(*act, est);
 
 	return ret;
 }
@@ -379,7 +378,7 @@ static int tcf_bpf_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, bpf_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_bpf_ops __read_mostly = {
@@ -399,7 +398,7 @@ static __net_init int bpf_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, bpf_net_id);
 
-	return tc_action_net_init(tn, &act_bpf_ops, BPF_TAB_MASK);
+	return tc_action_net_init(tn, &act_bpf_ops);
 }
 
 static void __net_exit bpf_exit_net(struct net *net)
diff --git a/net/sched/act_connmark.c b/net/sched/act_connmark.c
index 2155bc6..10b7a88 100644
--- a/net/sched/act_connmark.c
+++ b/net/sched/act_connmark.c
@@ -28,8 +28,6 @@
 #include <net/netfilter/nf_conntrack_core.h>
 #include <net/netfilter/nf_conntrack_zones.h>
 
-#define CONNMARK_TAB_MASK     3
-
 static unsigned int connmark_net_id;
 static struct tc_action_ops act_connmark_ops;
 
@@ -119,9 +117,9 @@ static int tcf_connmark_init(struct net *net, struct nlattr *nla,
 
 	parm = nla_data(tb[TCA_CONNMARK_PARMS]);
 
-	if (!tcf_hash_check(tn, parm->index, a, bind)) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_connmark_ops, bind, false);
+	if (!tcf_idr_check(tn, parm->index, a, bind)) {
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_connmark_ops, bind, false);
 		if (ret)
 			return ret;
 
@@ -130,13 +128,13 @@ static int tcf_connmark_init(struct net *net, struct nlattr *nla,
 		ci->net = net;
 		ci->zone = parm->zone;
 
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 		ret = ACT_P_CREATED;
 	} else {
 		ci = to_connmark(*a);
 		if (bind)
 			return 0;
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 		/* replacing action and zone */
@@ -189,7 +187,7 @@ static int tcf_connmark_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, connmark_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_connmark_ops = {
@@ -208,7 +206,7 @@ static __net_init int connmark_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, connmark_net_id);
 
-	return tc_action_net_init(tn, &act_connmark_ops, CONNMARK_TAB_MASK);
+	return tc_action_net_init(tn, &act_connmark_ops);
 }
 
 static void __net_exit connmark_exit_net(struct net *net)
diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c
index 67afc12..1c40caa 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -37,8 +37,6 @@
 #include <linux/tc_act/tc_csum.h>
 #include <net/tc_act/tc_csum.h>
 
-#define CSUM_TAB_MASK 15
-
 static const struct nla_policy csum_policy[TCA_CSUM_MAX + 1] = {
 	[TCA_CSUM_PARMS] = { .len = sizeof(struct tc_csum), },
 };
@@ -67,16 +65,16 @@ static int tcf_csum_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 	parm = nla_data(tb[TCA_CSUM_PARMS]);
 
-	if (!tcf_hash_check(tn, parm->index, a, bind)) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_csum_ops, bind, false);
+	if (!tcf_idr_check(tn, parm->index, a, bind)) {
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_csum_ops, bind, false);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
 		if (bind)/* dont override defaults */
 			return 0;
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -88,7 +86,7 @@ static int tcf_csum_init(struct net *net, struct nlattr *nla,
 	spin_unlock_bh(&p->tcf_lock);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 
 	return ret;
 }
@@ -609,7 +607,7 @@ static int tcf_csum_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, csum_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_csum_ops = {
@@ -628,7 +626,7 @@ static __net_init int csum_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, csum_net_id);
 
-	return tc_action_net_init(tn, &act_csum_ops, CSUM_TAB_MASK);
+	return tc_action_net_init(tn, &act_csum_ops);
 }
 
 static void __net_exit csum_exit_net(struct net *net)
diff --git a/net/sched/act_gact.c b/net/sched/act_gact.c
index 99afe8b..e29a48e 100644
--- a/net/sched/act_gact.c
+++ b/net/sched/act_gact.c
@@ -23,8 +23,6 @@
 #include <linux/tc_act/tc_gact.h>
 #include <net/tc_act/tc_gact.h>
 
-#define GACT_TAB_MASK	15
-
 static unsigned int gact_net_id;
 static struct tc_action_ops act_gact_ops;
 
@@ -92,16 +90,16 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla,
 	}
 #endif
 
-	if (!tcf_hash_check(tn, parm->index, a, bind)) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_gact_ops, bind, true);
+	if (!tcf_idr_check(tn, parm->index, a, bind)) {
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_gact_ops, bind, true);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
 		if (bind)/* dont override defaults */
 			return 0;
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -122,7 +120,7 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla,
 	}
 #endif
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -214,7 +212,7 @@ static int tcf_gact_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, gact_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_gact_ops = {
@@ -234,7 +232,7 @@ static __net_init int gact_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, gact_net_id);
 
-	return tc_action_net_init(tn, &act_gact_ops, GACT_TAB_MASK);
+	return tc_action_net_init(tn, &act_gact_ops);
 }
 
 static void __net_exit gact_exit_net(struct net *net)
diff --git a/net/sched/act_ife.c b/net/sched/act_ife.c
index c5dec30..770c5d9 100644
--- a/net/sched/act_ife.c
+++ b/net/sched/act_ife.c
@@ -34,8 +34,6 @@
 #include <linux/etherdevice.h>
 #include <net/ife.h>
 
-#define IFE_TAB_MASK 15
-
 static unsigned int ife_net_id;
 static int max_metacnt = IFE_META_MAX + 1;
 static struct tc_action_ops act_ife_ops;
@@ -452,7 +450,7 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
 
 	parm = nla_data(tb[TCA_IFE_PARMS]);
 
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
@@ -462,20 +460,20 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
 		**/
 		if (!tb[TCA_IFE_TYPE]) {
 			if (exists)
-				tcf_hash_release(*a, bind);
+				tcf_idr_release(*a, bind);
 			pr_info("You MUST pass etherype for encoding\n");
 			return -EINVAL;
 		}
 	}
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a, &act_ife_ops,
-				      bind, false);
+		ret = tcf_idr_create(tn, parm->index, est, a, &act_ife_ops,
+				     bind, false);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -518,7 +516,7 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
 		if (err) {
 metadata_parse_err:
 			if (exists)
-				tcf_hash_release(*a, bind);
+				tcf_idr_release(*a, bind);
 			if (ret == ACT_P_CREATED)
 				_tcf_ife_cleanup(*a, bind);
 
@@ -552,7 +550,7 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
 		spin_unlock_bh(&ife->tcf_lock);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 
 	return ret;
 }
@@ -811,7 +809,7 @@ static int tcf_ife_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, ife_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_ife_ops = {
@@ -831,7 +829,7 @@ static __net_init int ife_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, ife_net_id);
 
-	return tc_action_net_init(tn, &act_ife_ops, IFE_TAB_MASK);
+	return tc_action_net_init(tn, &act_ife_ops);
 }
 
 static void __net_exit ife_exit_net(struct net *net)
diff --git a/net/sched/act_ipt.c b/net/sched/act_ipt.c
index d516ba8..c59f600 100644
--- a/net/sched/act_ipt.c
+++ b/net/sched/act_ipt.c
@@ -28,8 +28,6 @@
 #include <linux/netfilter_ipv4/ip_tables.h>
 
 
-#define IPT_TAB_MASK     15
-
 static unsigned int ipt_net_id;
 static struct tc_action_ops act_ipt_ops;
 
@@ -116,33 +114,33 @@ static int __tcf_ipt_init(struct net *net, unsigned int id, struct nlattr *nla,
 	if (tb[TCA_IPT_INDEX] != NULL)
 		index = nla_get_u32(tb[TCA_IPT_INDEX]);
 
-	exists = tcf_hash_check(tn, index, a, bind);
+	exists = tcf_idr_check(tn, index, a, bind);
 	if (exists && bind)
 		return 0;
 
 	if (tb[TCA_IPT_HOOK] == NULL || tb[TCA_IPT_TARG] == NULL) {
 		if (exists)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -EINVAL;
 	}
 
 	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
 	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size) {
 		if (exists)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -EINVAL;
 	}
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, index, est, a, ops, bind,
-				      false);
+		ret = tcf_idr_create(tn, index, est, a, ops, bind,
+				     false);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
 		if (bind)/* dont override defaults */
 			return 0;
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 
 		if (!ovr)
 			return -EEXIST;
@@ -178,7 +176,7 @@ static int __tcf_ipt_init(struct net *net, unsigned int id, struct nlattr *nla,
 	ipt->tcfi_hook  = hook;
 	spin_unlock_bh(&ipt->tcf_lock);
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 
 err3:
@@ -187,7 +185,7 @@ static int __tcf_ipt_init(struct net *net, unsigned int id, struct nlattr *nla,
 	kfree(tname);
 err1:
 	if (ret == ACT_P_CREATED)
-		tcf_hash_cleanup(*a, est);
+		tcf_idr_cleanup(*a, est);
 	return err;
 }
 
@@ -314,7 +312,7 @@ static int tcf_ipt_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, ipt_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_ipt_ops = {
@@ -334,7 +332,7 @@ static __net_init int ipt_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, ipt_net_id);
 
-	return tc_action_net_init(tn, &act_ipt_ops, IPT_TAB_MASK);
+	return tc_action_net_init(tn, &act_ipt_ops);
 }
 
 static void __net_exit ipt_exit_net(struct net *net)
@@ -364,7 +362,7 @@ static int tcf_xt_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, xt_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_xt_ops = {
@@ -384,7 +382,7 @@ static __net_init int xt_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, xt_net_id);
 
-	return tc_action_net_init(tn, &act_xt_ops, IPT_TAB_MASK);
+	return tc_action_net_init(tn, &act_xt_ops);
 }
 
 static void __net_exit xt_exit_net(struct net *net)
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index 1b5549a..416627c 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -28,7 +28,6 @@
 #include <linux/tc_act/tc_mirred.h>
 #include <net/tc_act/tc_mirred.h>
 
-#define MIRRED_TAB_MASK     7
 static LIST_HEAD(mirred_list);
 static DEFINE_SPINLOCK(mirred_list_lock);
 
@@ -94,7 +93,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 	parm = nla_data(tb[TCA_MIRRED_PARMS]);
 
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
@@ -106,14 +105,14 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
 		break;
 	default:
 		if (exists)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -EINVAL;
 	}
 	if (parm->ifindex) {
 		dev = __dev_get_by_index(net, parm->ifindex);
 		if (dev == NULL) {
 			if (exists)
-				tcf_hash_release(*a, bind);
+				tcf_idr_release(*a, bind);
 			return -ENODEV;
 		}
 		mac_header_xmit = dev_is_mac_header_xmit(dev);
@@ -124,13 +123,13 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
 	if (!exists) {
 		if (dev == NULL)
 			return -EINVAL;
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_mirred_ops, bind, true);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_mirred_ops, bind, true);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -152,7 +151,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
 		spin_lock_bh(&mirred_list_lock);
 		list_add(&m->tcfm_list, &mirred_list);
 		spin_unlock_bh(&mirred_list_lock);
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	}
 
 	return ret;
@@ -283,7 +282,7 @@ static int tcf_mirred_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, mirred_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static int mirred_device_event(struct notifier_block *unused,
@@ -344,7 +343,7 @@ static __net_init int mirred_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, mirred_net_id);
 
-	return tc_action_net_init(tn, &act_mirred_ops, MIRRED_TAB_MASK);
+	return tc_action_net_init(tn, &act_mirred_ops);
 }
 
 static void __net_exit mirred_exit_net(struct net *net)
diff --git a/net/sched/act_nat.c b/net/sched/act_nat.c
index 9016ab8..c365d01 100644
--- a/net/sched/act_nat.c
+++ b/net/sched/act_nat.c
@@ -29,8 +29,6 @@
 #include <net/udp.h>
 
 
-#define NAT_TAB_MASK	15
-
 static unsigned int nat_net_id;
 static struct tc_action_ops act_nat_ops;
 
@@ -58,16 +56,16 @@ static int tcf_nat_init(struct net *net, struct nlattr *nla, struct nlattr *est,
 		return -EINVAL;
 	parm = nla_data(tb[TCA_NAT_PARMS]);
 
-	if (!tcf_hash_check(tn, parm->index, a, bind)) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_nat_ops, bind, false);
+	if (!tcf_idr_check(tn, parm->index, a, bind)) {
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_nat_ops, bind, false);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
 		if (bind)
 			return 0;
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -83,7 +81,7 @@ static int tcf_nat_init(struct net *net, struct nlattr *nla, struct nlattr *est,
 	spin_unlock_bh(&p->tcf_lock);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 
 	return ret;
 }
@@ -290,7 +288,7 @@ static int tcf_nat_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, nat_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_nat_ops = {
@@ -309,7 +307,7 @@ static __net_init int nat_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, nat_net_id);
 
-	return tc_action_net_init(tn, &act_nat_ops, NAT_TAB_MASK);
+	return tc_action_net_init(tn, &act_nat_ops);
 }
 
 static void __net_exit nat_exit_net(struct net *net)
diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c
index 7dc5892..491fe5de 100644
--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -24,8 +24,6 @@
 #include <net/tc_act/tc_pedit.h>
 #include <uapi/linux/tc_act/tc_pedit.h>
 
-#define PEDIT_TAB_MASK	15
-
 static unsigned int pedit_net_id;
 static struct tc_action_ops act_pedit_ops;
 
@@ -168,17 +166,17 @@ static int tcf_pedit_init(struct net *net, struct nlattr *nla,
 	if (IS_ERR(keys_ex))
 		return PTR_ERR(keys_ex);
 
-	if (!tcf_hash_check(tn, parm->index, a, bind)) {
+	if (!tcf_idr_check(tn, parm->index, a, bind)) {
 		if (!parm->nkeys)
 			return -EINVAL;
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_pedit_ops, bind, false);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_pedit_ops, bind, false);
 		if (ret)
 			return ret;
 		p = to_pedit(*a);
 		keys = kmalloc(ksize, GFP_KERNEL);
 		if (keys == NULL) {
-			tcf_hash_cleanup(*a, est);
+			tcf_idr_cleanup(*a, est);
 			kfree(keys_ex);
 			return -ENOMEM;
 		}
@@ -186,7 +184,7 @@ static int tcf_pedit_init(struct net *net, struct nlattr *nla,
 	} else {
 		if (bind)
 			return 0;
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 		p = to_pedit(*a);
@@ -214,7 +212,7 @@ static int tcf_pedit_init(struct net *net, struct nlattr *nla,
 
 	spin_unlock_bh(&p->tcf_lock);
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -432,7 +430,7 @@ static int tcf_pedit_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, pedit_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_pedit_ops = {
@@ -452,7 +450,7 @@ static __net_init int pedit_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, pedit_net_id);
 
-	return tc_action_net_init(tn, &act_pedit_ops, PEDIT_TAB_MASK);
+	return tc_action_net_init(tn, &act_pedit_ops);
 }
 
 static void __net_exit pedit_exit_net(struct net *net)
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index b062bc8..3bb2ebf 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -40,8 +40,6 @@ struct tcf_police {
 
 #define to_police(pc) ((struct tcf_police *)pc)
 
-#define POL_TAB_MASK     15
-
 /* old policer structure from before tc actions */
 struct tc_police_compat {
 	u32			index;
@@ -101,18 +99,18 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 
 	parm = nla_data(tb[TCA_POLICE_TBF]);
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, NULL, a,
-				      &act_police_ops, bind, false);
+		ret = tcf_idr_create(tn, parm->index, NULL, a,
+				     &act_police_ops, bind, false);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -188,7 +186,7 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
 		return ret;
 
 	police->tcfp_t_c = ktime_get_ns();
-	tcf_hash_insert(tn, *a);
+	tcf_idr_insert(tn, *a);
 
 	return ret;
 
@@ -196,7 +194,7 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
 	qdisc_put_rtab(P_tab);
 	qdisc_put_rtab(R_tab);
 	if (ret == ACT_P_CREATED)
-		tcf_hash_cleanup(*a, est);
+		tcf_idr_cleanup(*a, est);
 	return err;
 }
 
@@ -310,7 +308,7 @@ static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, police_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 MODULE_AUTHOR("Alexey Kuznetsov");
@@ -333,7 +331,7 @@ static __net_init int police_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, police_net_id);
 
-	return tc_action_net_init(tn, &act_police_ops, POL_TAB_MASK);
+	return tc_action_net_init(tn, &act_police_ops);
 }
 
 static void __net_exit police_exit_net(struct net *net)
diff --git a/net/sched/act_sample.c b/net/sched/act_sample.c
index 59d6645..ec986ae 100644
--- a/net/sched/act_sample.c
+++ b/net/sched/act_sample.c
@@ -25,7 +25,6 @@
 
 #include <linux/if_arp.h>
 
-#define SAMPLE_TAB_MASK     7
 static unsigned int sample_net_id;
 static struct tc_action_ops act_sample_ops;
 
@@ -59,18 +58,18 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
 
 	parm = nla_data(tb[TCA_SAMPLE_PARMS]);
 
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_sample_ops, bind, false);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_sample_ops, bind, false);
 		if (ret)
 			return ret;
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -82,7 +81,7 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
 	psample_group = psample_group_get(net, s->psample_group_num);
 	if (!psample_group) {
 		if (ret == ACT_P_CREATED)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -ENOMEM;
 	}
 	RCU_INIT_POINTER(s->psample_group, psample_group);
@@ -93,7 +92,7 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
 	}
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -221,7 +220,7 @@ static int tcf_sample_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, sample_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_sample_ops = {
@@ -241,7 +240,7 @@ static __net_init int sample_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, sample_net_id);
 
-	return tc_action_net_init(tn, &act_sample_ops, SAMPLE_TAB_MASK);
+	return tc_action_net_init(tn, &act_sample_ops);
 }
 
 static void __net_exit sample_exit_net(struct net *net)
diff --git a/net/sched/act_simple.c b/net/sched/act_simple.c
index 43605e7..e7b57e5 100644
--- a/net/sched/act_simple.c
+++ b/net/sched/act_simple.c
@@ -24,8 +24,6 @@
 #include <linux/tc_act/tc_defact.h>
 #include <net/tc_act/tc_defact.h>
 
-#define SIMP_TAB_MASK     7
-
 static unsigned int simp_net_id;
 static struct tc_action_ops act_simp_ops;
 
@@ -102,28 +100,28 @@ static int tcf_simp_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 
 	parm = nla_data(tb[TCA_DEF_PARMS]);
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
 	if (tb[TCA_DEF_DATA] == NULL) {
 		if (exists)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -EINVAL;
 	}
 
 	defdata = nla_data(tb[TCA_DEF_DATA]);
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_simp_ops, bind, false);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_simp_ops, bind, false);
 		if (ret)
 			return ret;
 
 		d = to_defact(*a);
 		ret = alloc_defdata(d, defdata);
 		if (ret < 0) {
-			tcf_hash_cleanup(*a, est);
+			tcf_idr_cleanup(*a, est);
 			return ret;
 		}
 		d->tcf_action = parm->action;
@@ -131,7 +129,7 @@ static int tcf_simp_init(struct net *net, struct nlattr *nla,
 	} else {
 		d = to_defact(*a);
 
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 
@@ -139,7 +137,7 @@ static int tcf_simp_init(struct net *net, struct nlattr *nla,
 	}
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -183,7 +181,7 @@ static int tcf_simp_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, simp_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_simp_ops = {
@@ -203,7 +201,7 @@ static __net_init int simp_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, simp_net_id);
 
-	return tc_action_net_init(tn, &act_simp_ops, SIMP_TAB_MASK);
+	return tc_action_net_init(tn, &act_simp_ops);
 }
 
 static void __net_exit simp_exit_net(struct net *net)
diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c
index 6b3e65d..59949d6 100644
--- a/net/sched/act_skbedit.c
+++ b/net/sched/act_skbedit.c
@@ -27,8 +27,6 @@
 #include <linux/tc_act/tc_skbedit.h>
 #include <net/tc_act/tc_skbedit.h>
 
-#define SKBEDIT_TAB_MASK     15
-
 static unsigned int skbedit_net_id;
 static struct tc_action_ops act_skbedit_ops;
 
@@ -118,18 +116,18 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
 
 	parm = nla_data(tb[TCA_SKBEDIT_PARMS]);
 
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
 	if (!flags) {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		return -EINVAL;
 	}
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_skbedit_ops, bind, false);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_skbedit_ops, bind, false);
 		if (ret)
 			return ret;
 
@@ -137,7 +135,7 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
 		ret = ACT_P_CREATED;
 	} else {
 		d = to_skbedit(*a);
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -163,7 +161,7 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
 	spin_unlock_bh(&d->tcf_lock);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -221,7 +219,7 @@ static int tcf_skbedit_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, skbedit_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_skbedit_ops = {
@@ -240,7 +238,7 @@ static __net_init int skbedit_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, skbedit_net_id);
 
-	return tc_action_net_init(tn, &act_skbedit_ops, SKBEDIT_TAB_MASK);
+	return tc_action_net_init(tn, &act_skbedit_ops);
 }
 
 static void __net_exit skbedit_exit_net(struct net *net)
diff --git a/net/sched/act_skbmod.c b/net/sched/act_skbmod.c
index a73c4bb..b642ad3 100644
--- a/net/sched/act_skbmod.c
+++ b/net/sched/act_skbmod.c
@@ -20,8 +20,6 @@
 #include <linux/tc_act/tc_skbmod.h>
 #include <net/tc_act/tc_skbmod.h>
 
-#define SKBMOD_TAB_MASK     15
-
 static unsigned int skbmod_net_id;
 static struct tc_action_ops act_skbmod_ops;
 
@@ -129,7 +127,7 @@ static int tcf_skbmod_init(struct net *net, struct nlattr *nla,
 	if (parm->flags & SKBMOD_F_SWAPMAC)
 		lflags = SKBMOD_F_SWAPMAC;
 
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
@@ -137,14 +135,14 @@ static int tcf_skbmod_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_skbmod_ops, bind, true);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_skbmod_ops, bind, true);
 		if (ret)
 			return ret;
 
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -155,7 +153,7 @@ static int tcf_skbmod_init(struct net *net, struct nlattr *nla,
 	p = kzalloc(sizeof(struct tcf_skbmod_params), GFP_KERNEL);
 	if (unlikely(!p)) {
 		if (ovr)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -ENOMEM;
 	}
 
@@ -182,7 +180,7 @@ static int tcf_skbmod_init(struct net *net, struct nlattr *nla,
 		kfree_rcu(p_old, rcu);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -245,7 +243,7 @@ static int tcf_skbmod_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, skbmod_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_skbmod_ops = {
@@ -265,7 +263,7 @@ static __net_init int skbmod_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, skbmod_net_id);
 
-	return tc_action_net_init(tn, &act_skbmod_ops, SKBMOD_TAB_MASK);
+	return tc_action_net_init(tn, &act_skbmod_ops);
 }
 
 static void __net_exit skbmod_exit_net(struct net *net)
diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index fd7e756..30c9627 100644
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -20,8 +20,6 @@
 #include <linux/tc_act/tc_tunnel_key.h>
 #include <net/tc_act/tc_tunnel_key.h>
 
-#define TUNNEL_KEY_TAB_MASK     15
-
 static unsigned int tunnel_key_net_id;
 static struct tc_action_ops act_tunnel_key_ops;
 
@@ -100,7 +98,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 
 	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
@@ -159,14 +157,14 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 	}
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_tunnel_key_ops, bind, true);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_tunnel_key_ops, bind, true);
 		if (ret)
 			return ret;
 
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -177,7 +175,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
 	if (unlikely(!params_new)) {
 		if (ret == ACT_P_CREATED)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -ENOMEM;
 	}
 
@@ -193,13 +191,13 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 		kfree_rcu(params_old, rcu);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 
 	return ret;
 
 err_out:
 	if (exists)
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 	return ret;
 }
 
@@ -304,7 +302,7 @@ static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_tunnel_key_ops = {
@@ -324,7 +322,7 @@ static __net_init int tunnel_key_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 
-	return tc_action_net_init(tn, &act_tunnel_key_ops, TUNNEL_KEY_TAB_MASK);
+	return tc_action_net_init(tn, &act_tunnel_key_ops);
 }
 
 static void __net_exit tunnel_key_exit_net(struct net *net)
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index 13ba3a8..16eb067 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -19,8 +19,6 @@
 #include <linux/tc_act/tc_vlan.h>
 #include <net/tc_act/tc_vlan.h>
 
-#define VLAN_TAB_MASK     15
-
 static unsigned int vlan_net_id;
 static struct tc_action_ops act_vlan_ops;
 
@@ -128,7 +126,7 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
 	if (!tb[TCA_VLAN_PARMS])
 		return -EINVAL;
 	parm = nla_data(tb[TCA_VLAN_PARMS]);
-	exists = tcf_hash_check(tn, parm->index, a, bind);
+	exists = tcf_idr_check(tn, parm->index, a, bind);
 	if (exists && bind)
 		return 0;
 
@@ -139,13 +137,13 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
 	case TCA_VLAN_ACT_MODIFY:
 		if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
 			if (exists)
-				tcf_hash_release(*a, bind);
+				tcf_idr_release(*a, bind);
 			return -EINVAL;
 		}
 		push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
 		if (push_vid >= VLAN_VID_MASK) {
 			if (exists)
-				tcf_hash_release(*a, bind);
+				tcf_idr_release(*a, bind);
 			return -ERANGE;
 		}
 
@@ -167,20 +165,20 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
 		break;
 	default:
 		if (exists)
-			tcf_hash_release(*a, bind);
+			tcf_idr_release(*a, bind);
 		return -EINVAL;
 	}
 	action = parm->v_action;
 
 	if (!exists) {
-		ret = tcf_hash_create(tn, parm->index, est, a,
-				      &act_vlan_ops, bind, false);
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_vlan_ops, bind, false);
 		if (ret)
 			return ret;
 
 		ret = ACT_P_CREATED;
 	} else {
-		tcf_hash_release(*a, bind);
+		tcf_idr_release(*a, bind);
 		if (!ovr)
 			return -EEXIST;
 	}
@@ -199,7 +197,7 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
 	spin_unlock_bh(&v->tcf_lock);
 
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(tn, *a);
+		tcf_idr_insert(tn, *a);
 	return ret;
 }
 
@@ -252,7 +250,7 @@ static int tcf_vlan_search(struct net *net, struct tc_action **a, u32 index)
 {
 	struct tc_action_net *tn = net_generic(net, vlan_net_id);
 
-	return tcf_hash_search(tn, a, index);
+	return tcf_idr_search(tn, a, index);
 }
 
 static struct tc_action_ops act_vlan_ops = {
@@ -271,7 +269,7 @@ static __net_init int vlan_init_net(struct net *net)
 {
 	struct tc_action_net *tn = net_generic(net, vlan_net_id);
 
-	return tc_action_net_init(tn, &act_vlan_ops, VLAN_TAB_MASK);
+	return tc_action_net_init(tn, &act_vlan_ops);
 }
 
 static void __net_exit vlan_exit_net(struct net *net)
-- 
1.8.3.1


------------------------------------------------------------------------------
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^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [patch net-next 0/3] net/sched: Improve getting objects by indexes
       [not found] ` <1502849538-14284-1-git-send-email-chrism-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
                     ` (2 preceding siblings ...)
  2017-08-16  2:12   ` [patch net-next 3/3] net/sched: Change act_api and act_xxx modules " Chris Mi
@ 2017-08-16  7:49   ` Christian König
  2017-08-16  9:19     ` Chris Wilson
  3 siblings, 1 reply; 6+ messages in thread
From: Christian König @ 2017-08-16  7:49 UTC (permalink / raw)
  To: Chris Mi, netdev-u79uwXL29TY76Z2rM5mHXA
  Cc: lucho-OnYtXJJ0/fesTnJN9+BGXg,
	sergey.senozhatsky.work-Re5JQEeQqe8AvxtiuMwx3w,
	snitzer-H+wXaHxf7aLQT0dZR+AlfA, wsa-z923LK4zBo2bacvFa/9K2g,
	markb-VPRAkNaXOzVWk0Htik3J/w, tom.leiming-Re5JQEeQqe8AvxtiuMwx3w,
	stefanr-MtYdepGKPcBMYopoZt5u/LNAH6kLmebB,
	zhi.a.wang-ral2JQCrhuEAvxtiuMwx3w, nsekhar-l0cyMroinI0,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	bfields-uC3wQj2KruNg9hUCZPvPmw,
	linux-sctp-u79uwXL29TY76Z2rM5mHXA, paulus-eUNUBHrolfbYtjvyW6yDsg,
	jinpu.wang-EIkl63zCoXaH+58JC4qpiA, pshelar-LZ6Gd1LRuIk,
	sumit.semwal-QSEj5FYQhm4dnm+yROfE0A, AlexBin.Xie-5C7GfCeVMHo,
	david1.zhou-5C7GfCeVMHo,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
	maximlevitsky-Re5JQEeQqe8AvxtiuMwx3w,
	sudarsana.kalluru-h88ZbnxC6KDQT0dZR+AlfA,
	marek.vasut-Re5JQEeQqe8AvxtiuMwx3w,
	linux-atm-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	dtwlin-Re5JQEeQqe8AvxtiuMwx3w, michel.daenzer-5C7GfCeVMHo,
	dledford-H+wXaHxf7aLQT0dZR+AlfA,
	tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
	stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
	longman-H+wXaHxf7aLQT0dZR+AlfA,
	niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w,
	philipp.reisner-63ez5xqkn6DQT0dZR+AlfA,
	shli-DgEjT+Ai2ygdnm+yROfE0A, linux-0h96xk9xTtrk1uMJSBkQmQ,
	ohad-Ix1uc/W3ht7QT0dZR+AlfA, pmladek-IBi9RG/b67k,
	dick.kennedy-dY08KVG/lbpWk0Htik3J/w

Am 16.08.2017 um 04:12 schrieb Chris Mi:
> Using current TC code, it is very slow to insert a lot of rules.
>
> In order to improve the rules update rate in TC,
> we introduced the following two changes:
>          1) changed cls_flower to use IDR to manage the filters.
>          2) changed all act_xxx modules to use IDR instead of
>             a small hash table
>
> But IDR has a limitation that it uses int. TC handle uses u32.
> To make sure there is no regression, we also changed IDR to use
> unsigned long. All clients of IDR are changed to use new IDR API.

WOW, wait a second. The idr change is touching a lot of drivers and to 
be honest doesn't looks correct at all.

Just look at the first chunk of your modification:
> @@ -998,8 +999,9 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
>   
>   	mutex_lock(&bsg_mutex);
>   
> -	ret = idr_alloc(&bsg_minor_idr, bcd, 0, BSG_MAX_DEVS, GFP_KERNEL);
> -	if (ret < 0) {
> +	ret = idr_alloc(&bsg_minor_idr, bcd, &idr_index, 0, BSG_MAX_DEVS,
> +			GFP_KERNEL);
> +	if (ret) {
>   		if (ret == -ENOSPC) {
>   			printk(KERN_ERR "bsg: too many bsg devices\n");
>   			ret = -EINVAL;
The condition "if (ret)" will now always be true after the first 
allocation and so we always run into the error handling after that.

I've never read the bsg code before, but that's certainly not correct. 
And that incorrect pattern repeats over and over again in this code.

Apart from that why the heck do you want to allocate more than 1<<31 
handles?

Regards,
Christian.

>
> Chris Mi (3):
>    idr: Use unsigned long instead of int
>    net/sched: Change cls_flower to use IDR
>    net/sched: Change act_api and act_xxx modules to use IDR
>
>   block/bsg.c                                     |   8 +-
>   block/genhd.c                                   |  12 +-
>   drivers/atm/nicstar.c                           |  11 +-
>   drivers/block/drbd/drbd_main.c                  |  31 +--
>   drivers/block/drbd/drbd_nl.c                    |  22 ++-
>   drivers/block/drbd/drbd_proc.c                  |   3 +-
>   drivers/block/drbd/drbd_receiver.c              |  15 +-
>   drivers/block/drbd/drbd_state.c                 |  34 ++--
>   drivers/block/drbd/drbd_worker.c                |   6 +-
>   drivers/block/loop.c                            |  17 +-
>   drivers/block/nbd.c                             |  20 +-
>   drivers/block/zram/zram_drv.c                   |   9 +-
>   drivers/char/tpm/tpm-chip.c                     |  10 +-
>   drivers/char/tpm/tpm.h                          |   2 +-
>   drivers/dca/dca-sysfs.c                         |   9 +-
>   drivers/firewire/core-cdev.c                    |  18 +-
>   drivers/firewire/core-device.c                  |  15 +-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c     |   8 +-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c         |   9 +-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c         |   6 +-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c         |   2 +-
>   drivers/gpu/drm/drm_auth.c                      |   9 +-
>   drivers/gpu/drm/drm_connector.c                 |  10 +-
>   drivers/gpu/drm/drm_context.c                   |  20 +-
>   drivers/gpu/drm/drm_dp_aux_dev.c                |  11 +-
>   drivers/gpu/drm/drm_drv.c                       |   6 +-
>   drivers/gpu/drm/drm_gem.c                       |  19 +-
>   drivers/gpu/drm/drm_info.c                      |   2 +-
>   drivers/gpu/drm/drm_mode_object.c               |  11 +-
>   drivers/gpu/drm/drm_syncobj.c                   |  18 +-
>   drivers/gpu/drm/exynos/exynos_drm_ipp.c         |  25 ++-
>   drivers/gpu/drm/i915/gvt/display.c              |   2 +-
>   drivers/gpu/drm/i915/gvt/kvmgt.c                |   2 +-
>   drivers/gpu/drm/i915/gvt/vgpu.c                 |   9 +-
>   drivers/gpu/drm/i915/i915_debugfs.c             |   6 +-
>   drivers/gpu/drm/i915/i915_gem_context.c         |   9 +-
>   drivers/gpu/drm/qxl/qxl_cmd.c                   |   8 +-
>   drivers/gpu/drm/qxl/qxl_release.c               |  14 +-
>   drivers/gpu/drm/sis/sis_mm.c                    |   8 +-
>   drivers/gpu/drm/tegra/drm.c                     |  10 +-
>   drivers/gpu/drm/tilcdc/tilcdc_slave_compat.c    |   3 +-
>   drivers/gpu/drm/vgem/vgem_fence.c               |  12 +-
>   drivers/gpu/drm/via/via_mm.c                    |   8 +-
>   drivers/gpu/drm/virtio/virtgpu_kms.c            |   5 +-
>   drivers/gpu/drm/virtio/virtgpu_vq.c             |   5 +-
>   drivers/gpu/drm/vmwgfx/vmwgfx_resource.c        |   9 +-
>   drivers/i2c/i2c-core-base.c                     |  19 +-
>   drivers/infiniband/core/cm.c                    |   8 +-
>   drivers/infiniband/core/cma.c                   |  12 +-
>   drivers/infiniband/core/rdma_core.c             |   9 +-
>   drivers/infiniband/core/sa_query.c              |  23 +--
>   drivers/infiniband/core/ucm.c                   |   7 +-
>   drivers/infiniband/core/ucma.c                  |  14 +-
>   drivers/infiniband/hw/cxgb3/iwch.c              |   4 +-
>   drivers/infiniband/hw/cxgb3/iwch.h              |   4 +-
>   drivers/infiniband/hw/cxgb4/device.c            |  18 +-
>   drivers/infiniband/hw/cxgb4/iw_cxgb4.h          |   4 +-
>   drivers/infiniband/hw/hfi1/init.c               |   9 +-
>   drivers/infiniband/hw/hfi1/vnic_main.c          |   6 +-
>   drivers/infiniband/hw/mlx4/cm.c                 |  13 +-
>   drivers/infiniband/hw/ocrdma/ocrdma_main.c      |   7 +-
>   drivers/infiniband/hw/qib/qib_init.c            |   9 +-
>   drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c |  10 +-
>   drivers/iommu/intel-svm.c                       |   9 +-
>   drivers/md/dm.c                                 |  13 +-
>   drivers/memstick/core/memstick.c                |  10 +-
>   drivers/memstick/core/ms_block.c                |   9 +-
>   drivers/memstick/core/mspro_block.c             |  12 +-
>   drivers/mfd/rtsx_pcr.c                          |   9 +-
>   drivers/misc/c2port/core.c                      |   7 +-
>   drivers/misc/cxl/context.c                      |   8 +-
>   drivers/misc/cxl/main.c                         |  15 +-
>   drivers/misc/mei/main.c                         |   8 +-
>   drivers/misc/mic/scif/scif_api.c                |  11 +-
>   drivers/misc/mic/scif/scif_ports.c              |  18 +-
>   drivers/misc/tifm_core.c                        |   9 +-
>   drivers/mtd/mtdcore.c                           |   9 +-
>   drivers/mtd/mtdcore.h                           |   2 +-
>   drivers/mtd/ubi/block.c                         |   7 +-
>   drivers/net/ppp/ppp_generic.c                   |  27 +--
>   drivers/net/tap.c                               |  10 +-
>   drivers/net/wireless/ath/ath10k/htt.h           |   3 +-
>   drivers/net/wireless/ath/ath10k/htt_tx.c        |  22 ++-
>   drivers/net/wireless/ath/ath10k/mac.c           |   2 +-
>   drivers/net/wireless/marvell/mwifiex/main.c     |  13 +-
>   drivers/net/wireless/marvell/mwifiex/wmm.c      |   2 +-
>   drivers/of/overlay.c                            |  15 +-
>   drivers/of/unittest.c                           |  25 ++-
>   drivers/power/supply/bq2415x_charger.c          |  16 +-
>   drivers/power/supply/bq27xxx_battery_i2c.c      |  15 +-
>   drivers/power/supply/ds2782_battery.c           |   9 +-
>   drivers/powercap/powercap_sys.c                 |   8 +-
>   drivers/pps/pps.c                               |  10 +-
>   drivers/rapidio/rio_cm.c                        |  17 +-
>   drivers/remoteproc/remoteproc_core.c            |   8 +-
>   drivers/rpmsg/virtio_rpmsg_bus.c                |   8 +-
>   drivers/scsi/bfa/bfad_im.c                      |   8 +-
>   drivers/scsi/ch.c                               |   8 +-
>   drivers/scsi/lpfc/lpfc_crtn.h                   |   2 +-
>   drivers/scsi/lpfc/lpfc_init.c                   |  11 +-
>   drivers/scsi/lpfc/lpfc_vport.c                  |   8 +-
>   drivers/scsi/sg.c                               |  10 +-
>   drivers/scsi/st.c                               |   8 +-
>   drivers/staging/greybus/uart.c                  |  22 +--
>   drivers/staging/unisys/visorhba/visorhba_main.c |   7 +-
>   drivers/target/iscsi/iscsi_target.c             |   7 +-
>   drivers/target/iscsi/iscsi_target_login.c       |   9 +-
>   drivers/target/target_core_device.c             |   9 +-
>   drivers/target/target_core_user.c               |  13 +-
>   drivers/tee/tee_shm.c                           |   8 +-
>   drivers/uio/uio.c                               |   9 +-
>   drivers/usb/class/cdc-acm.c                     |  24 +--
>   drivers/usb/core/devices.c                      |   2 +-
>   drivers/usb/core/hcd.c                          |   7 +-
>   drivers/usb/mon/mon_main.c                      |   3 +-
>   drivers/usb/serial/usb-serial.c                 |  11 +-
>   drivers/vfio/vfio.c                             |  15 +-
>   fs/dlm/lock.c                                   |   9 +-
>   fs/dlm/lockspace.c                              |   6 +-
>   fs/dlm/recover.c                                |  10 +-
>   fs/nfs/nfs4client.c                             |   9 +-
>   fs/nfsd/nfs4state.c                             |   8 +-
>   fs/notify/inotify/inotify_fsnotify.c            |   4 +-
>   fs/notify/inotify/inotify_user.c                |   9 +-
>   fs/ocfs2/cluster/tcp.c                          |  10 +-
>   include/linux/idr.h                             |  26 +--
>   include/linux/of.h                              |   4 +-
>   include/linux/radix-tree.h                      |   2 +-
>   include/net/9p/9p.h                             |   2 +-
>   include/net/act_api.h                           |  76 +++-----
>   ipc/msg.c                                       |   2 +-
>   ipc/sem.c                                       |   2 +-
>   ipc/shm.c                                       |   4 +-
>   ipc/util.c                                      |  17 +-
>   kernel/bpf/syscall.c                            |  20 +-
>   kernel/cgroup/cgroup.c                          |  57 +++---
>   kernel/events/core.c                            |  10 +-
>   kernel/workqueue.c                              |  15 +-
>   lib/idr.c                                       |  38 ++--
>   lib/radix-tree.c                                |   5 +-
>   mm/memcontrol.c                                 |  11 +-
>   net/9p/client.c                                 |  17 +-
>   net/9p/util.c                                   |  14 +-
>   net/core/net_namespace.c                        |  23 ++-
>   net/mac80211/cfg.c                              |  23 +--
>   net/mac80211/iface.c                            |   3 +-
>   net/mac80211/main.c                             |   2 +-
>   net/mac80211/tx.c                               |   7 +-
>   net/mac80211/util.c                             |   3 +-
>   net/netlink/genetlink.c                         |  18 +-
>   net/qrtr/qrtr.c                                 |  21 +-
>   net/rxrpc/conn_client.c                         |  15 +-
>   net/sched/act_api.c                             | 249 +++++++++++-------------
>   net/sched/act_bpf.c                             |  17 +-
>   net/sched/act_connmark.c                        |  16 +-
>   net/sched/act_csum.c                            |  16 +-
>   net/sched/act_gact.c                            |  16 +-
>   net/sched/act_ife.c                             |  20 +-
>   net/sched/act_ipt.c                             |  26 ++-
>   net/sched/act_mirred.c                          |  19 +-
>   net/sched/act_nat.c                             |  16 +-
>   net/sched/act_pedit.c                           |  18 +-
>   net/sched/act_police.c                          |  18 +-
>   net/sched/act_sample.c                          |  17 +-
>   net/sched/act_simple.c                          |  20 +-
>   net/sched/act_skbedit.c                         |  18 +-
>   net/sched/act_skbmod.c                          |  18 +-
>   net/sched/act_tunnel_key.c                      |  20 +-
>   net/sched/act_vlan.c                            |  22 +--
>   net/sched/cls_flower.c                          |  55 +++---
>   net/sctp/associola.c                            |   8 +-
>   net/tipc/server.c                               |   7 +-
>   172 files changed, 1256 insertions(+), 1113 deletions(-)
>

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [patch net-next 0/3] net/sched: Improve getting objects by indexes
  2017-08-16  7:49   ` [patch net-next 0/3] net/sched: Improve getting objects by indexes Christian König
@ 2017-08-16  9:19     ` Chris Wilson
  0 siblings, 0 replies; 6+ messages in thread
From: Chris Wilson @ 2017-08-16  9:19 UTC (permalink / raw)
  To: Christian König, Chris Mi, netdev
  Cc: lucho, sergey.senozhatsky.work, snitzer, wsa, markb, tom.leiming,
	stefanr, zhi.a.wang, nsekhar, dri-devel, bfields, linux-sctp,
	paulus, jinpu.wang, pshelar, sumit.semwal, AlexBin.Xie,
	david1.zhou, linux-samsung-soc, maximlevitsky, sudarsana.kalluru,
	marek.vasut, linux-atm-general, dtwlin, michel.daenzer, dledford,
	tpmdd-devel, stern, longman, niranjana.vishwanathapura,
	philipp.reisner, shli, linux, ohad, pmladek, dick.kennedy

Quoting Christian König (2017-08-16 08:49:07)
> Am 16.08.2017 um 04:12 schrieb Chris Mi:
> > Using current TC code, it is very slow to insert a lot of rules.
> >
> > In order to improve the rules update rate in TC,
> > we introduced the following two changes:
> >          1) changed cls_flower to use IDR to manage the filters.
> >          2) changed all act_xxx modules to use IDR instead of
> >             a small hash table
> >
> > But IDR has a limitation that it uses int. TC handle uses u32.
> > To make sure there is no regression, we also changed IDR to use
> > unsigned long. All clients of IDR are changed to use new IDR API.
> 
> WOW, wait a second. The idr change is touching a lot of drivers and to 
> be honest doesn't looks correct at all.
> 
> Just look at the first chunk of your modification:
> > @@ -998,8 +999,9 @@ int bsg_register_queue(struct request_queue *q, struct device *parent,
> >   
> >       mutex_lock(&bsg_mutex);
> >   
> > -     ret = idr_alloc(&bsg_minor_idr, bcd, 0, BSG_MAX_DEVS, GFP_KERNEL);
> > -     if (ret < 0) {
> > +     ret = idr_alloc(&bsg_minor_idr, bcd, &idr_index, 0, BSG_MAX_DEVS,
> > +                     GFP_KERNEL);
> > +     if (ret) {
> >               if (ret == -ENOSPC) {
> >                       printk(KERN_ERR "bsg: too many bsg devices\n");
> >                       ret = -EINVAL;
> The condition "if (ret)" will now always be true after the first 
> allocation and so we always run into the error handling after that.

ret is now purely the error code, so it doesn't look that suspicious.

> I've never read the bsg code before, but that's certainly not correct. 
> And that incorrect pattern repeats over and over again in this code.
> 
> Apart from that why the heck do you want to allocate more than 1<<31 
> handles?

And more to the point, arbitrarily changing the maximum to ULONG_MAX
where the ABI only supports U32_MAX is dangerous. Unless you do the
analysis otherwise, you have to replace all the end=0 with end=INT_MAX
to maintain existing behaviour.
-Chris

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^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2017-08-16  9:19 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-08-16  2:12 [patch net-next 0/3] net/sched: Improve getting objects by indexes Chris Mi
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2017-08-16  2:12   ` [patch net-next 1/3] idr: Use unsigned long instead of int Chris Mi
2017-08-16  2:12   ` [patch net-next 2/3] net/sched: Change cls_flower to use IDR Chris Mi
2017-08-16  2:12   ` [patch net-next 3/3] net/sched: Change act_api and act_xxx modules " Chris Mi
2017-08-16  7:49   ` [patch net-next 0/3] net/sched: Improve getting objects by indexes Christian König
2017-08-16  9:19     ` Chris Wilson

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