Ingo Molnar bb42ad4e4d compiler/gcc4: Add quirk for 'asm goto' miscompilation bug ...

commit 3f0116c323 upstream.

Fengguang Wu, Oleg Nesterov and Peter Zijlstra tracked down
a kernel crash to a GCC bug: GCC miscompiles certain 'asm goto'
constructs, as outlined here:

  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670

Implement a workaround suggested by Jakub Jelinek.

Reported-and-tested-by: Fengguang Wu <fengguang.wu@intel.com>
Reported-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Suggested-by: Jakub Jelinek <jakub@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20131015062351.GA4666@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-10-18 07:45:45 -07:00

..

asm

compiler/gcc4: Add quirk for 'asm goto' miscompilation bug

2013-10-18 07:45:45 -07:00

uapi/asm

Merge branch 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2013-06-11 11:16:43 -07:00