Commit-ID: 57d9b1b43433a6ba7267c80b87d8e8f6e86edceb Gitweb: http://git.kernel.org/tip/57d9b1b43433a6ba7267c80b87d8e8f6e86edceb Author: Michael S. Tsirkin <[email protected]> AuthorDate: Thu, 28 Jan 2016 19:02:44 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Fri, 29 Jan 2016 09:40:10 +0100
locking/x86: Tweak the comment about use of wmb() for IO On x86, we *do* still use the non-NOP rmb()/wmb() for IO barriers, but even that is generally questionable. Leave them around as historial unless somebody can point to a case where they care about the performance, but tweak the comment so people don't think they are strictly required in all cases. Signed-off-by: Michael S. Tsirkin <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Andrey Konovalov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Davidlohr Bueso <[email protected]> Cc: Davidlohr Bueso <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: virtualization <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/include/asm/barrier.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h index a291745..bfb28ca 100644 --- a/arch/x86/include/asm/barrier.h +++ b/arch/x86/include/asm/barrier.h @@ -6,7 +6,7 @@ /* * Force strict CPU ordering. - * And yes, this is required on UP too when we're talking + * And yes, this might be required on UP too when we're talking * to devices. */
