Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium"
authorRusty Russell <rusty@rustcorp.com.au>
Tue, 5 Jan 2010 02:18:49 +0000 (12:18 +1030)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 6 Jan 2010 00:01:35 +0000 (16:01 -0800)
commitdb677ffa5f5a4f15b9dad4d132b3477b80766d82
tree1379d67ad09bb932a8afa5c85eccacba6d8ca19c
parent6307daad8496f5807a2ef60cbada55fe3b59c44e
Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium"

This reverts commit ae1b22f6e46c03cede7cea234d0bf2253b4261cf.

As Linus said in 982d007a6ee: "There was something really messy about
cmpxchg8b and clone CPU's, so if you enable it on other CPUs later, do it
carefully."

This breaks lguest for those configs, but we can fix that by emulating
if we have to.

Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14884
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/x86/Kconfig.cpu