diff options
| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2016-03-22 14:27:45 -0700 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:50:54 +0900 |
| commit | a3291e7200f9deab6ca77f44e89d279292a2a7c6 (patch) | |
| tree | e0230f42c48e637333b1eccc2ff6167a2e255064 /lib | |
| parent | 294a8532510a0fbd49485a4aca35ed5dd07d6d21 (diff) | |
ubsan: fix tree-wide -Wmaybe-uninitialized false positives
-fsanitize=* options makes GCC less smart than usual and increase number
of 'maybe-uninitialized' false-positives. So this patch does two things:
* Add -Wno-maybe-uninitialized to CFLAGS_UBSAN which will disable all
such warnings for instrumented files.
* Remove CONFIG_UBSAN_SANITIZE_ALL from all[yes|mod]config builds. So
the all[yes|mod]config build goes without -fsanitize=* and still with
-Wmaybe-uninitialized.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[backport from mainline for UBSAN]
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Change-Id: Ia32d029540fcb5ebd19a3ac447a3b6333a173f84
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.ubsan | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan index e07c1ba9ba13..39494af9a84a 100644 --- a/lib/Kconfig.ubsan +++ b/lib/Kconfig.ubsan @@ -13,6 +13,11 @@ config UBSAN_SANITIZE_ALL bool "Enable instrumentation for the entire kernel" depends on UBSAN depends on ARCH_HAS_UBSAN_SANITIZE_ALL + + # We build with -Wno-maybe-uninitilzed, but we still want to + # use -Wmaybe-uninitilized in allmodconfig builds. + # So dependsy bellow used to disable this option in allmodconfig + depends on !COMPILE_TEST default y help This option activates instrumentation for the entire kernel. |