diff options
| author | Qian Cai <cai@lca.pw> | 2019-09-23 15:36:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-24 15:54:10 -0700 |
| commit | b57a775f5130dd83ba0e7f46cd86741bf19b71c5 (patch) | |
| tree | 303a1b4c5b316de463f7b59a7e2ba63afcb5a8fb /mm/Makefile | |
| parent | 2286bf4e4d8f2fda407222b54f685dff3b80e0a0 (diff) | |
| download | lwn-b57a775f5130dd83ba0e7f46cd86741bf19b71c5.tar.gz lwn-b57a775f5130dd83ba0e7f46cd86741bf19b71c5.zip | |
mm: silence -Woverride-init/initializer-overrides
When compiling a kernel with W=1, there are several of those warnings due
to arm64 overriding a field on purpose. Just disable those warnings for
both GCC and Clang of this file, so it will help dig "gems" hidden in the
W=1 warnings by reducing some noises.
mm/init-mm.c:39:2: warning: initializer overrides prior initialization
of this subobject [-Winitializer-overrides]
INIT_MM_CONTEXT(init_mm)
^~~~~~~~~~~~~~~~~~~~~~~~
./arch/arm64/include/asm/mmu.h:133:9: note: expanded from macro
'INIT_MM_CONTEXT'
.pgd = init_pg_dir,
^~~~~~~~~~~
mm/init-mm.c:30:10: note: previous initialization is here
.pgd = swapper_pg_dir,
^~~~~~~~~~~~~~
Note: there is a side project trying to support explicitly allowing
specific initializer overrides in Clang, but there is no guarantee it
will happen or not.
https://github.com/ClangBuiltLinux/linux/issues/639
Link: http://lkml.kernel.org/r/1566920867-27453-1-git-send-email-cai@lca.pw
Signed-off-by: Qian Cai <cai@lca.pw>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Makefile')
| -rw-r--r-- | mm/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/Makefile b/mm/Makefile index d11de59e9c3c..d996846697ef 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -21,6 +21,9 @@ KCOV_INSTRUMENT_memcontrol.o := n KCOV_INSTRUMENT_mmzone.o := n KCOV_INSTRUMENT_vmstat.o := n +CFLAGS_init-mm.o += $(call cc-disable-warning, override-init) +CFLAGS_init-mm.o += $(call cc-disable-warning, initializer-overrides) + mmu-y := nommu.o mmu-$(CONFIG_MMU) := highmem.o memory.o mincore.o \ mlock.o mmap.o mmu_gather.o mprotect.o mremap.o \ |