* [PATCH v2 1/2] kbuild: add kbuild-file macro
@ 2022-11-18 19:15 Masahiro Yamada
2022-11-18 19:15 ` [PATCH v2 2/2] kbuild: warn objects shared among multiple modules Masahiro Yamada
0 siblings, 1 reply; 5+ messages in thread
From: Masahiro Yamada @ 2022-11-18 19:15 UTC (permalink / raw)
To: linux-kbuild
Cc: Masahiro Yamada, Nicolas Schier, Nathan Chancellor,
Nick Desaulniers, linux-kernel
While building, installing, cleaning, Kbuild visits sub-directories
and includes 'Kbuild' or 'Makefile' that exists there.
Add 'kbuild-file' macro, and reuse it from scripts/Makefie.*
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
---
Changes in v2:
- Change scripts/Makefile.modpost
scripts/Kbuild.include | 5 +++++
scripts/Makefile.asm-generic | 6 +++---
scripts/Makefile.build | 6 +-----
scripts/Makefile.clean | 5 +----
scripts/Makefile.dtbinst | 2 +-
scripts/Makefile.modpost | 2 +-
6 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 2bc08ace38a3..cbe28744637b 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -40,6 +40,11 @@ escsq = $(subst $(squote),'\$(squote)',$1)
# Quote a string to pass it to C files. foo => '"foo"'
stringify = $(squote)$(quote)$1$(quote)$(squote)
+###
+# The path to Kbuild or Makefile. Kbuild has precedence over Makefile.
+kbuild-dir = $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+kbuild-file = $(or $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Makefile)
+
###
# Easy method for doing a status message
kecho := :
diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic
index 1d501c57f9ef..8d01b37b7677 100644
--- a/scripts/Makefile.asm-generic
+++ b/scripts/Makefile.asm-generic
@@ -10,15 +10,15 @@ PHONY := all
all:
src := $(subst /generated,,$(obj))
--include $(src)/Kbuild
+
+include $(srctree)/scripts/Kbuild.include
+-include $(kbuild-file)
# $(generic)/Kbuild lists mandatory-y. Exclude um since it is a special case.
ifneq ($(SRCARCH),um)
include $(srctree)/$(generic)/Kbuild
endif
-include $(srctree)/scripts/Kbuild.include
-
redundant := $(filter $(mandatory-y) $(generated-y), $(generic-y))
redundant += $(foreach f, $(generic-y), $(if $(wildcard $(srctree)/$(src)/$(f)),$(f)))
redundant := $(sort $(redundant))
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 41f3602fc8de..37cf88d076e8 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -38,11 +38,7 @@ subdir-ccflags-y :=
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.compiler
-
-# The filename Kbuild has precedence over Makefile
-kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(or $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Makefile)
-
+include $(kbuild-file)
include $(srctree)/scripts/Makefile.lib
# Do not include hostprogs rules unless needed.
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 878cec648959..3649900696dd 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -9,10 +9,7 @@ PHONY := __clean
__clean:
include $(srctree)/scripts/Kbuild.include
-
-# The filename Kbuild has precedence over Makefile
-kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(or $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Makefile)
+include $(kbuild-file)
# Figure out what we need to build from the various variables
# ==========================================================================
diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst
index 190d781e84f4..2ab936e4179d 100644
--- a/scripts/Makefile.dtbinst
+++ b/scripts/Makefile.dtbinst
@@ -15,7 +15,7 @@ __dtbs_install:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
-include $(src)/Makefile
+include $(kbuild-file)
dtbs := $(addprefix $(dst)/, $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS),$(dtb-)))
subdirs := $(addprefix $(obj)/, $(subdir-y) $(subdir-m))
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index e41dee64d429..55a72f5eb76d 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -93,7 +93,7 @@ obj := $(KBUILD_EXTMOD)
src := $(obj)
# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
-include $(or $(wildcard $(src)/Kbuild), $(src)/Makefile)
+include $(kbuild-file)
module.symvers-if-present := $(wildcard Module.symvers)
output-symdump := $(KBUILD_EXTMOD)/Module.symvers
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v2 2/2] kbuild: warn objects shared among multiple modules
2022-11-18 19:15 [PATCH v2 1/2] kbuild: add kbuild-file macro Masahiro Yamada
@ 2022-11-18 19:15 ` Masahiro Yamada
2022-11-18 21:35 ` Alexander Lobakin
2022-11-22 6:20 ` Nicolas Schier
0 siblings, 2 replies; 5+ messages in thread
From: Masahiro Yamada @ 2022-11-18 19:15 UTC (permalink / raw)
To: linux-kbuild
Cc: Masahiro Yamada, Nathan Chancellor, Nick Desaulniers,
Nick Terrell, Nicolas Schier, Tom Rix, linux-kernel, llvm
If an object is shared among multiple modules, amd some of them are
configured as 'm', but the others as 'y', the shared object is built
as modular, then linked to the modules and vmlinux. This is a potential
issue because the expected CFLAGS are different between modules and
builtins.
Commit 637a642f5ca5 ("zstd: Fixing mixed module-builtin objects")
reported that this could be even more fatal in some cases such as
Clang LTO.
That commit fixed lib/zlib/zstd_{compress,decompress}, but there are
still more instances of breakage.
This commit adds a W=1 warning for shared objects, so that the kbuild
test robot, which provides build tests with W=1, will avoid a new
breakage slipping in.
Quick compile tests on v6.1-rc4 detected the following:
scripts/Makefile.build:252: ./drivers/block/rnbd/Makefile: rnbd-common.o is added to multiple modules: rnbd-client rnbd-server
scripts/Makefile.build:252: ./drivers/crypto/marvell/octeontx2/Makefile: cn10k_cpt.o is added to multiple modules: rvu_cptpf rvu_cptvf
scripts/Makefile.build:252: ./drivers/crypto/marvell/octeontx2/Makefile: otx2_cptlf.o is added to multiple modules: rvu_cptpf rvu_cptvf
scripts/Makefile.build:252: ./drivers/crypto/marvell/octeontx2/Makefile: otx2_cpt_mbox_common.o is added to multiple modules: rvu_cptpf rvu_cptvf
scripts/Makefile.build:252: ./drivers/edac/Makefile: skx_common.o is added to multiple modules: i10nm_edac skx_edac
scripts/Makefile.build:252: ./drivers/gpu/drm/bridge/imx/Makefile: imx-ldb-helper.o is added to multiple modules: imx8qm-ldb imx8qxp-ldb
scripts/Makefile.build:252: ./drivers/mfd/Makefile: rsmu_core.o is added to multiple modules: rsmu-i2c rsmu-spi
scripts/Makefile.build:252: ./drivers/mtd/tests/Makefile: mtd_test.o is added to multiple modules: mtd_nandbiterrs mtd_oobtest mtd_pagetest mtd_readtest mtd_speedtest mtd_stresstest mtd_subpagetest mtd_torturetest
scripts/Makefile.build:252: ./drivers/net/dsa/ocelot/Makefile: felix.o is added to multiple modules: mscc_felix mscc_seville
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn23xx_pf_device.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn23xx_vf_device.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn66xx_device.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn68xx_device.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: lio_core.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: lio_ethtool.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_device.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_droq.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_mailbox.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_mem_ops.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_nic.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: request_manager.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: response_manager.o is added to multiple modules: liquidio liquidio_vf
scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/dpaa2/Makefile: dpaa2-mac.o is added to multiple modules: fsl-dpaa2-eth fsl-dpaa2-switch
scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/dpaa2/Makefile: dpmac.o is added to multiple modules: fsl-dpaa2-eth fsl-dpaa2-switch
scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/enetc/Makefile: enetc_cbdr.o is added to multiple modules: fsl-enetc fsl-enetc-vf
scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/enetc/Makefile: enetc_ethtool.o is added to multiple modules: fsl-enetc fsl-enetc-vf
scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/enetc/Makefile: enetc.o is added to multiple modules: fsl-enetc fsl-enetc-vf
scripts/Makefile.build:252: ./drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_cmd.o is added to multiple modules: hclge hclgevf
scripts/Makefile.build:252: ./drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_rss.o is added to multiple modules: hclge hclgevf
scripts/Makefile.build:252: ./drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_tqp_stats.o is added to multiple modules: hclge hclgevf
scripts/Makefile.build:252: ./drivers/net/ethernet/marvell/octeontx2/nic/Makefile: otx2_dcbnl.o is added to multiple modules: rvu_nicpf rvu_nicvf
scripts/Makefile.build:252: ./drivers/net/ethernet/marvell/octeontx2/nic/Makefile: otx2_devlink.o is added to multiple modules: rvu_nicpf rvu_nicvf
scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_ale.o is added to multiple modules: keystone_netcp keystone_netcp_ethss ti_cpsw ti_cpsw_new
scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_ethtool.o is added to multiple modules: ti_cpsw ti_cpsw_new
scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_priv.o is added to multiple modules: ti_cpsw ti_cpsw_new
scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_sl.o is added to multiple modules: ti_cpsw ti_cpsw_new
scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: davinci_cpdma.o is added to multiple modules: ti_cpsw ti_cpsw_new ti_davinci_emac
scripts/Makefile.build:252: ./drivers/platform/x86/intel/int3472/Makefile: common.o is added to multiple modules: intel_skl_int3472_discrete intel_skl_int3472_tps68470
scripts/Makefile.build:252: ./sound/soc/codecs/Makefile: wcd-clsh-v2.o is added to multiple modules: snd-soc-wcd9335 snd-soc-wcd934x snd-soc-wcd938x
Once all the warnings are fixed, it can become an error irrespective of
W= option.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
Changes in v2:
- Add drivers/block/rnbd/Makefile for commit log
scripts/Makefile.build | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 37cf88d076e8..799df12b53f3 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -222,6 +222,10 @@ endif
cmd_check_local_export = $(srctree)/scripts/check-local-export $@
+ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
+cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
+endif
+
define rule_cc_o_c
$(call cmd_and_fixdep,cc_o_c)
$(call cmd,gen_ksymdeps)
@@ -231,6 +235,7 @@ define rule_cc_o_c
$(call cmd,gen_objtooldep)
$(call cmd,gen_symversions_c)
$(call cmd,record_mcount)
+ $(call cmd,warn_shared_object)
endef
define rule_as_o_S
@@ -239,6 +244,7 @@ define rule_as_o_S
$(call cmd,check_local_export)
$(call cmd,gen_objtooldep)
$(call cmd,gen_symversions_S)
+ $(call cmd,warn_shared_object)
endef
# Built-in and composite module parts
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v2 2/2] kbuild: warn objects shared among multiple modules
2022-11-18 19:15 ` [PATCH v2 2/2] kbuild: warn objects shared among multiple modules Masahiro Yamada
@ 2022-11-18 21:35 ` Alexander Lobakin
2022-11-19 6:09 ` Masahiro Yamada
2022-11-22 6:20 ` Nicolas Schier
1 sibling, 1 reply; 5+ messages in thread
From: Alexander Lobakin @ 2022-11-18 21:35 UTC (permalink / raw)
To: Masahiro Yamada
Cc: Alexander Lobakin, linux-kbuild, Nathan Chancellor,
Nick Desaulniers, Nick Terrell, Nicolas Schier, Tom Rix,
linux-kernel, llvm
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 19 Nov 2022 04:15:51 +0900
> If an object is shared among multiple modules, amd some of them are
> configured as 'm', but the others as 'y', the shared object is built
> as modular, then linked to the modules and vmlinux. This is a potential
> issue because the expected CFLAGS are different between modules and
> builtins.
>
> Commit 637a642f5ca5 ("zstd: Fixing mixed module-builtin objects")
> reported that this could be even more fatal in some cases such as
> Clang LTO.
>
> That commit fixed lib/zlib/zstd_{compress,decompress}, but there are
> still more instances of breakage.
>
> This commit adds a W=1 warning for shared objects, so that the kbuild
> test robot, which provides build tests with W=1, will avoid a new
> breakage slipping in.
>
> Quick compile tests on v6.1-rc4 detected the following:
For the series:
Reviewed-and-tested-by: Alexander Lobakin <alobakin@pm.me>
[...]
> Once all the warnings are fixed, it can become an error irrespective of
> W= option.
BTW I've fixed most of these (the ones that get build on typical
x86_64 distroconfig) during my local tests, basing off your WIP
tree. I could send a series if you wish.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
>
> Changes in v2:
> - Add drivers/block/rnbd/Makefile for commit log
>
> scripts/Makefile.build | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> index 37cf88d076e8..799df12b53f3 100644
> --- a/scripts/Makefile.build
> +++ b/scripts/Makefile.build
> @@ -222,6 +222,10 @@ endif
>
> cmd_check_local_export = $(srctree)/scripts/check-local-export $@
>
> +ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
> +cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
> +endif
> +
> define rule_cc_o_c
> $(call cmd_and_fixdep,cc_o_c)
> $(call cmd,gen_ksymdeps)
> @@ -231,6 +235,7 @@ define rule_cc_o_c
> $(call cmd,gen_objtooldep)
> $(call cmd,gen_symversions_c)
> $(call cmd,record_mcount)
> + $(call cmd,warn_shared_object)
> endef
>
> define rule_as_o_S
> @@ -239,6 +244,7 @@ define rule_as_o_S
> $(call cmd,check_local_export)
> $(call cmd,gen_objtooldep)
> $(call cmd,gen_symversions_S)
> + $(call cmd,warn_shared_object)
> endef
>
> # Built-in and composite module parts
> --
> 2.34.1
Thanks,
Olek
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2 2/2] kbuild: warn objects shared among multiple modules
2022-11-18 21:35 ` Alexander Lobakin
@ 2022-11-19 6:09 ` Masahiro Yamada
0 siblings, 0 replies; 5+ messages in thread
From: Masahiro Yamada @ 2022-11-19 6:09 UTC (permalink / raw)
To: Alexander Lobakin
Cc: linux-kbuild, Nathan Chancellor, Nick Desaulniers, Nick Terrell,
Nicolas Schier, Tom Rix, linux-kernel, llvm
On Sat, Nov 19, 2022 at 6:36 AM Alexander Lobakin <alobakin@pm.me> wrote:
>
> From: Masahiro Yamada <masahiroy@kernel.org>
> Date: Sat, 19 Nov 2022 04:15:51 +0900
>
> > If an object is shared among multiple modules, amd some of them are
> > configured as 'm', but the others as 'y', the shared object is built
> > as modular, then linked to the modules and vmlinux. This is a potential
> > issue because the expected CFLAGS are different between modules and
> > builtins.
> >
> > Commit 637a642f5ca5 ("zstd: Fixing mixed module-builtin objects")
> > reported that this could be even more fatal in some cases such as
> > Clang LTO.
> >
> > That commit fixed lib/zlib/zstd_{compress,decompress}, but there are
> > still more instances of breakage.
> >
> > This commit adds a W=1 warning for shared objects, so that the kbuild
> > test robot, which provides build tests with W=1, will avoid a new
> > breakage slipping in.
> >
> > Quick compile tests on v6.1-rc4 detected the following:
>
> For the series:
>
> Reviewed-and-tested-by: Alexander Lobakin <alobakin@pm.me>
>
> [...]
>
> > Once all the warnings are fixed, it can become an error irrespective of
> > W= option.
>
> BTW I've fixed most of these (the ones that get build on typical
> x86_64 distroconfig) during my local tests, basing off your WIP
> tree. I could send a series if you wish.
Yes, thanks for the help.
>
> >
> > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> > ---
> >
> > Changes in v2:
> > - Add drivers/block/rnbd/Makefile for commit log
> >
> > scripts/Makefile.build | 6 ++++++
> > 1 file changed, 6 insertions(+)
> >
> > diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> > index 37cf88d076e8..799df12b53f3 100644
> > --- a/scripts/Makefile.build
> > +++ b/scripts/Makefile.build
> > @@ -222,6 +222,10 @@ endif
> >
> > cmd_check_local_export = $(srctree)/scripts/check-local-export $@
> >
> > +ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
> > +cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
> > +endif
> > +
> > define rule_cc_o_c
> > $(call cmd_and_fixdep,cc_o_c)
> > $(call cmd,gen_ksymdeps)
> > @@ -231,6 +235,7 @@ define rule_cc_o_c
> > $(call cmd,gen_objtooldep)
> > $(call cmd,gen_symversions_c)
> > $(call cmd,record_mcount)
> > + $(call cmd,warn_shared_object)
> > endef
> >
> > define rule_as_o_S
> > @@ -239,6 +244,7 @@ define rule_as_o_S
> > $(call cmd,check_local_export)
> > $(call cmd,gen_objtooldep)
> > $(call cmd,gen_symversions_S)
> > + $(call cmd,warn_shared_object)
> > endef
> >
> > # Built-in and composite module parts
> > --
> > 2.34.1
>
> Thanks,
> Olek
>
--
Best Regards
Masahiro Yamada
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2 2/2] kbuild: warn objects shared among multiple modules
2022-11-18 19:15 ` [PATCH v2 2/2] kbuild: warn objects shared among multiple modules Masahiro Yamada
2022-11-18 21:35 ` Alexander Lobakin
@ 2022-11-22 6:20 ` Nicolas Schier
1 sibling, 0 replies; 5+ messages in thread
From: Nicolas Schier @ 2022-11-22 6:20 UTC (permalink / raw)
To: Masahiro Yamada
Cc: linux-kbuild, Nathan Chancellor, Nick Desaulniers, Nick Terrell,
Tom Rix, linux-kernel, llvm
[-- Attachment #1: Type: text/plain, Size: 8190 bytes --]
On Sat 19 Nov 2022 04:15:51 GMT, Masahiro Yamada wrote:
> If an object is shared among multiple modules, amd some of them are
amd -> and
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
> configured as 'm', but the others as 'y', the shared object is built
> as modular, then linked to the modules and vmlinux. This is a potential
> issue because the expected CFLAGS are different between modules and
> builtins.
>
> Commit 637a642f5ca5 ("zstd: Fixing mixed module-builtin objects")
> reported that this could be even more fatal in some cases such as
> Clang LTO.
>
> That commit fixed lib/zlib/zstd_{compress,decompress}, but there are
> still more instances of breakage.
>
> This commit adds a W=1 warning for shared objects, so that the kbuild
> test robot, which provides build tests with W=1, will avoid a new
> breakage slipping in.
>
> Quick compile tests on v6.1-rc4 detected the following:
>
> scripts/Makefile.build:252: ./drivers/block/rnbd/Makefile: rnbd-common.o is added to multiple modules: rnbd-client rnbd-server
> scripts/Makefile.build:252: ./drivers/crypto/marvell/octeontx2/Makefile: cn10k_cpt.o is added to multiple modules: rvu_cptpf rvu_cptvf
> scripts/Makefile.build:252: ./drivers/crypto/marvell/octeontx2/Makefile: otx2_cptlf.o is added to multiple modules: rvu_cptpf rvu_cptvf
> scripts/Makefile.build:252: ./drivers/crypto/marvell/octeontx2/Makefile: otx2_cpt_mbox_common.o is added to multiple modules: rvu_cptpf rvu_cptvf
> scripts/Makefile.build:252: ./drivers/edac/Makefile: skx_common.o is added to multiple modules: i10nm_edac skx_edac
> scripts/Makefile.build:252: ./drivers/gpu/drm/bridge/imx/Makefile: imx-ldb-helper.o is added to multiple modules: imx8qm-ldb imx8qxp-ldb
> scripts/Makefile.build:252: ./drivers/mfd/Makefile: rsmu_core.o is added to multiple modules: rsmu-i2c rsmu-spi
> scripts/Makefile.build:252: ./drivers/mtd/tests/Makefile: mtd_test.o is added to multiple modules: mtd_nandbiterrs mtd_oobtest mtd_pagetest mtd_readtest mtd_speedtest mtd_stresstest mtd_subpagetest mtd_torturetest
> scripts/Makefile.build:252: ./drivers/net/dsa/ocelot/Makefile: felix.o is added to multiple modules: mscc_felix mscc_seville
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn23xx_pf_device.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn23xx_vf_device.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn66xx_device.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: cn68xx_device.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: lio_core.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: lio_ethtool.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_device.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_droq.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_mailbox.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_mem_ops.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: octeon_nic.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: request_manager.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/cavium/liquidio/Makefile: response_manager.o is added to multiple modules: liquidio liquidio_vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/dpaa2/Makefile: dpaa2-mac.o is added to multiple modules: fsl-dpaa2-eth fsl-dpaa2-switch
> scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/dpaa2/Makefile: dpmac.o is added to multiple modules: fsl-dpaa2-eth fsl-dpaa2-switch
> scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/enetc/Makefile: enetc_cbdr.o is added to multiple modules: fsl-enetc fsl-enetc-vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/enetc/Makefile: enetc_ethtool.o is added to multiple modules: fsl-enetc fsl-enetc-vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/freescale/enetc/Makefile: enetc.o is added to multiple modules: fsl-enetc fsl-enetc-vf
> scripts/Makefile.build:252: ./drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_cmd.o is added to multiple modules: hclge hclgevf
> scripts/Makefile.build:252: ./drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_rss.o is added to multiple modules: hclge hclgevf
> scripts/Makefile.build:252: ./drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_tqp_stats.o is added to multiple modules: hclge hclgevf
> scripts/Makefile.build:252: ./drivers/net/ethernet/marvell/octeontx2/nic/Makefile: otx2_dcbnl.o is added to multiple modules: rvu_nicpf rvu_nicvf
> scripts/Makefile.build:252: ./drivers/net/ethernet/marvell/octeontx2/nic/Makefile: otx2_devlink.o is added to multiple modules: rvu_nicpf rvu_nicvf
> scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_ale.o is added to multiple modules: keystone_netcp keystone_netcp_ethss ti_cpsw ti_cpsw_new
> scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_ethtool.o is added to multiple modules: ti_cpsw ti_cpsw_new
> scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_priv.o is added to multiple modules: ti_cpsw ti_cpsw_new
> scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: cpsw_sl.o is added to multiple modules: ti_cpsw ti_cpsw_new
> scripts/Makefile.build:252: ./drivers/net/ethernet/ti/Makefile: davinci_cpdma.o is added to multiple modules: ti_cpsw ti_cpsw_new ti_davinci_emac
> scripts/Makefile.build:252: ./drivers/platform/x86/intel/int3472/Makefile: common.o is added to multiple modules: intel_skl_int3472_discrete intel_skl_int3472_tps68470
> scripts/Makefile.build:252: ./sound/soc/codecs/Makefile: wcd-clsh-v2.o is added to multiple modules: snd-soc-wcd9335 snd-soc-wcd934x snd-soc-wcd938x
>
> Once all the warnings are fixed, it can become an error irrespective of
> W= option.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
>
> Changes in v2:
> - Add drivers/block/rnbd/Makefile for commit log
>
> scripts/Makefile.build | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> index 37cf88d076e8..799df12b53f3 100644
> --- a/scripts/Makefile.build
> +++ b/scripts/Makefile.build
> @@ -222,6 +222,10 @@ endif
>
> cmd_check_local_export = $(srctree)/scripts/check-local-export $@
>
> +ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
> +cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
> +endif
> +
> define rule_cc_o_c
> $(call cmd_and_fixdep,cc_o_c)
> $(call cmd,gen_ksymdeps)
> @@ -231,6 +235,7 @@ define rule_cc_o_c
> $(call cmd,gen_objtooldep)
> $(call cmd,gen_symversions_c)
> $(call cmd,record_mcount)
> + $(call cmd,warn_shared_object)
> endef
>
> define rule_as_o_S
> @@ -239,6 +244,7 @@ define rule_as_o_S
> $(call cmd,check_local_export)
> $(call cmd,gen_objtooldep)
> $(call cmd,gen_symversions_S)
> + $(call cmd,warn_shared_object)
> endef
>
> # Built-in and composite module parts
> --
> 2.34.1
--
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-11-22 6:26 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-11-18 19:15 [PATCH v2 1/2] kbuild: add kbuild-file macro Masahiro Yamada
2022-11-18 19:15 ` [PATCH v2 2/2] kbuild: warn objects shared among multiple modules Masahiro Yamada
2022-11-18 21:35 ` Alexander Lobakin
2022-11-19 6:09 ` Masahiro Yamada
2022-11-22 6:20 ` Nicolas Schier
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