From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: jack@suse.cz, snitzer@redhat.com,
Heiko Carstens <heiko.carstens@de.ibm.com>,
david@fromorbit.com, linux-kernel@vger.kernel.org,
linux-xfs@vger.kernel.org,
Bart Van Assche <Bart.VanAssche@wdc.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux-fsdevel@vger.kernel.org, hch@lst.de
Subject: [PATCH v8 08/18] dax: introduce CONFIG_DAX_DRIVER
Date: Fri, 30 Mar 2018 21:02:52 -0700 [thread overview]
Message-ID: <152246897244.36038.14718237765737542802.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <152246892890.36038.18436540150980653229.stgit@dwillia2-desk3.amr.corp.intel.com>
In support of allowing device-mapper to compile out idle/dead code when
there are no dax providers in the system, introduce the DAX_DRIVER
symbol. This is selected by all leaf drivers that device-mapper might be
layered on top. This allows device-mapper to conditionally 'select DAX'
only when a provider is present.
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Reported-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/dax/Kconfig | 5 ++++-
drivers/nvdimm/Kconfig | 2 +-
drivers/s390/block/Kconfig | 2 +-
3 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig
index b79aa8f7a497..e0700bf4893a 100644
--- a/drivers/dax/Kconfig
+++ b/drivers/dax/Kconfig
@@ -1,3 +1,7 @@
+config DAX_DRIVER
+ select DAX
+ bool
+
menuconfig DAX
tristate "DAX: direct access to differentiated memory"
select SRCU
@@ -16,7 +20,6 @@ config DEV_DAX
baseline memory pool. Mappings of a /dev/daxX.Y device impose
restrictions that make the mapping behavior deterministic.
-
config DEV_DAX_PMEM
tristate "PMEM DAX: direct access to persistent memory"
depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX
diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig
index a65f2e1d9f53..40cbdb16e23e 100644
--- a/drivers/nvdimm/Kconfig
+++ b/drivers/nvdimm/Kconfig
@@ -20,7 +20,7 @@ if LIBNVDIMM
config BLK_DEV_PMEM
tristate "PMEM: Persistent memory block device support"
default LIBNVDIMM
- select DAX
+ select DAX_DRIVER
select ND_BTT if BTT
select ND_PFN if NVDIMM_PFN
help
diff --git a/drivers/s390/block/Kconfig b/drivers/s390/block/Kconfig
index 1444333210c7..9ac7574e3cfb 100644
--- a/drivers/s390/block/Kconfig
+++ b/drivers/s390/block/Kconfig
@@ -15,8 +15,8 @@ config BLK_DEV_XPRAM
config DCSSBLK
def_tristate m
- select DAX
select FS_DAX_LIMITED
+ select DAX_DRIVER
prompt "DCSSBLK support"
depends on S390 && BLOCK
help
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next prev parent reply other threads:[~2018-03-31 4:12 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-31 4:02 [PATCH v8 00/18] dax: fix dma vs truncate/hole-punch Dan Williams
2018-03-31 4:02 ` [PATCH v8 01/18] dax: store pfns in the radix Dan Williams
2018-03-31 4:02 ` [PATCH v8 02/18] fs, dax: prepare for dax-specific address_space_operations Dan Williams
2018-03-31 4:02 ` [PATCH v8 03/18] block, dax: remove dead code in blkdev_writepages() Dan Williams
2018-03-31 4:02 ` [PATCH v8 04/18] xfs, dax: introduce xfs_dax_aops Dan Williams
2018-03-31 4:02 ` [PATCH v8 05/18] ext4, dax: introduce ext4_dax_aops Dan Williams
2018-04-03 11:50 ` Jan Kara
2018-03-31 4:02 ` [PATCH v8 06/18] ext2, dax: introduce ext2_dax_aops Dan Williams
2018-04-03 11:51 ` Jan Kara
2018-03-31 4:02 ` [PATCH v8 07/18] fs, dax: use page->mapping to warn if truncate collides with a busy page Dan Williams
2018-03-31 4:02 ` Dan Williams [this message]
2018-03-31 4:02 ` [PATCH v8 09/18] dax, dm: allow device-mapper to operate without dax support Dan Williams
2018-03-31 4:03 ` [PATCH v8 10/18] dax, dm: introduce ->fs_{claim, release}() dax_device infrastructure Dan Williams
2018-04-03 18:24 ` Dan Williams
2018-04-03 19:39 ` Mike Snitzer
2018-04-03 19:47 ` Dan Williams
2018-04-03 20:36 ` [PATCH v9] " Dan Williams
2018-04-03 21:13 ` Mike Snitzer
2018-03-31 4:03 ` [PATCH v8 11/18] mm, dax: enable filesystems to trigger dev_pagemap ->page_free callbacks Dan Williams
2018-04-04 21:23 ` [v8, " Andrei Vagin
2018-04-04 21:27 ` Dan Williams
2018-04-04 21:35 ` Dan Williams
2018-04-04 23:19 ` Stephen Rothwell
2018-04-04 21:40 ` Andrei Vagin
2018-03-31 4:03 ` [PATCH v8 12/18] memremap: split devm_memremap_pages() and memremap() infrastructure Dan Williams
2018-03-31 4:03 ` [PATCH v8 13/18] mm, dev_pagemap: introduce CONFIG_DEV_PAGEMAP_OPS Dan Williams
2018-03-31 4:03 ` [PATCH v8 14/18] memremap: mark devm_memremap_pages() EXPORT_SYMBOL_GPL Dan Williams
2018-03-31 4:03 ` [PATCH v8 15/18] mm, fs, dax: handle layout changes to pinned dax mappings Dan Williams
2018-04-04 9:46 ` Jan Kara
2018-04-04 10:06 ` Jan Kara
2018-04-04 14:12 ` Dan Williams
2018-04-07 19:38 ` Dan Williams
2018-04-08 3:11 ` Paul E. McKenney
2018-04-09 16:39 ` Jan Kara
2018-04-09 18:14 ` Paul E. McKenney
2018-04-09 16:49 ` Jan Kara
2018-04-09 16:51 ` Dan Williams
2018-04-13 22:03 ` Dan Williams
2018-04-13 22:48 ` Paul E. McKenney
2018-04-19 10:44 ` Jan Kara
2018-04-20 3:00 ` Dan Williams
2018-03-31 4:03 ` [PATCH v8 16/18] xfs: prepare xfs_break_layouts() to be called with XFS_MMAPLOCK_EXCL Dan Williams
2018-03-31 4:03 ` [PATCH v8 17/18] xfs: prepare xfs_break_layouts() for another layout type Dan Williams
2018-03-31 4:03 ` [PATCH v8 18/18] xfs, dax: introduce xfs_break_dax_layouts() Dan Williams
2018-04-04 9:55 ` Jan Kara
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