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ubsan: cosmetic fix to Kconfig text

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When enabling UBSAN_SANITIZE_ALL, the kernel image size gets increased
significantly (~3x).  So, it sounds better to have some note in Kconfig.

And, fixed a typo.

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yang Shi 2016-02-11 16:12:55 -08:00 committed by Linus Torvalds
parent c05235d50f
commit 7707535ab9
1 changed files with 3 additions and 1 deletions
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lib/Kconfig.ubsan
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@ -18,6 +18,8 @@ config UBSAN_SANITIZE_ALL
This option activates instrumentation for the entire kernel. This option activates instrumentation for the entire kernel.
If you don't enable this option, you have to explicitly specify If you don't enable this option, you have to explicitly specify
UBSAN_SANITIZE := y for the files/directories you want to check for UB. UBSAN_SANITIZE := y for the files/directories you want to check for UB.
Enabling this option will get kernel image size increased
significantly.
config UBSAN_ALIGNMENT config UBSAN_ALIGNMENT
bool "Enable checking of pointers alignment" bool "Enable checking of pointers alignment"
@ -25,5 +27,5 @@ config UBSAN_ALIGNMENT
default y if !HAVE_EFFICIENT_UNALIGNED_ACCESS default y if !HAVE_EFFICIENT_UNALIGNED_ACCESS
help help
This option enables detection of unaligned memory accesses. This option enables detection of unaligned memory accesses.
Enabling this option on architectures that support unalligned Enabling this option on architectures that support unaligned
accesses may produce a lot of false positives. accesses may produce a lot of false positives.