x86: disable stack-protector for __restore_processor_state()
authorJoseph Cihula <joseph.cihula@intel.com>
Mon, 30 Mar 2009 21:03:01 +0000 (14:03 -0700)
committerIngo Molnar <mingo@elte.hu>
Fri, 3 Apr 2009 17:48:41 +0000 (19:48 +0200)
commit9b7b89efa3bdaceaa2efb93e2d635391835da209
treef98eb1e69b74b32098f8f2d3ae2deb8546b3fa82
parent6a491e2e3e52a64c6d88a192c56499d931842ac5
x86: disable stack-protector for __restore_processor_state()

The __restore_processor_state() fn restores %gs on resume from S3.  As
such, it cannot be protected by the stack-protector guard since %gs will
not be correct on function entry.

There are only a few other fns in this file and it should not negatively
impact kernel security that they will also have the stack-protector
guard removed (and so it's not worth moving them to another file).

Without this change, S3 resume on a kernel built with
CONFIG_CC_STACKPROTECTOR_ALL=y will fail.

Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Tested-by: Chris Wright <chrisw@sous-sol.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Tejun Heo <tj@kernel.org>
LKML-Reference: <49D13385.5060900@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/power/Makefile