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authorLinus Torvalds <torvalds@linux-foundation.org>2009-07-12 11:25:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-07-12 11:25:04 -0700
commita137802ee839ace40079bebde24cfb416f73208a (patch)
treedb6e93c3d1c9f5808a2d78fcf91fe96260eb786b /drivers/char/tty_ioctl.c
parent8b9f2caa02e96bb92327e3b4557adbb3f1203dc7 (diff)
Don't use '-fwrapv' compiler option: it's buggy in gcc-4.1.x
This causes kernel images that don't run init to completion with certain broken gcc versions. This fixes kernel bugzilla entry: http://bugzilla.kernel.org/show_bug.cgi?id=13012 I suspect the gcc problem is this: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28230 Fix the problem by using the -fno-strict-overflow flag instead, which not only does not exist in the known-to-be-broken versions of gcc (it was introduced later than fwrapv), but seems to be much less disturbing to gcc too: the difference in the generated code by -fno-strict-overflow are smaller (compared to using neither flag) than when using -fwrapv. Reported-by: Barry K. Nathan <barryn@pobox.com> Pushed-by: Frans Pop <elendil@planet.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/tty_ioctl.c')
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