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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2015-10-22 23:32:24 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-10-23 11:55:10 +0300 |
| commit | 3f181b4d8652f7bcd7e9932c7307b8ecd4d87cf6 (patch) | |
| tree | 8ded32ddaf872b9f4087c6735275274fc767cee9 /lib/fault-inject.c | |
| parent | 296291cdd1629c308114504b850dc343eabc2782 (diff) | |
| download | linux-3f181b4d8652f7bcd7e9932c7307b8ecd4d87cf6.tar.xz | |
lib/Kconfig.debug: disable -Wframe-larger-than warnings with KASAN=y
When the kernel compiled with KASAN=y, GCC adds redzones for each
variable on stack. This enlarges function's stack frame and causes:
'warning: the frame size of X bytes is larger than Y bytes'
The worst case I've seen for now is following:
../net/wireless/nl80211.c: In function `nl80211_send_wiphy':
../net/wireless/nl80211.c:1731:1: warning: the frame size of 5448 bytes is larger than 2048 bytes [-Wframe-larger-than=]
That kind of warning becomes useless with KASAN=y. It doesn't
necessarily indicate that there is some problem in the code, thus we
should turn it off.
(The KASAN=y stack size in increased from 16k to 32k for this reason)
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Abylay Ospan <aospan@netup.ru>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Kozlov Sergey <serjk@netup.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/fault-inject.c')
0 files changed, 0 insertions, 0 deletions