This is a note to let you know that I've just added the patch titled
perf tools: Fix AAAAARGH64 memory barriers
to the 3.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-tools-fix-aaaaargh64-memory-barriers.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f428ebd184c82a7914b2aa7e9f868918aaf7ea78 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Fri, 24 Jan 2014 16:40:02 +0100
Subject: perf tools: Fix AAAAARGH64 memory barriers
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
commit f428ebd184c82a7914b2aa7e9f868918aaf7ea78 upstream.
Someone got the load and store barriers mixed up for AAAAARGH64. Turn
them the right side up.
Reported-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Fixes: a94d342b9cb0 ("tools/perf: Add required memory barriers")
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Link: http://lkml.kernel.org/r/20140124154002.GF31570@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/perf/perf.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -100,8 +100,8 @@
#ifdef __aarch64__
#define mb() asm volatile("dmb ish" ::: "memory")
-#define wmb() asm volatile("dmb ishld" ::: "memory")
-#define rmb() asm volatile("dmb ishst" ::: "memory")
+#define wmb() asm volatile("dmb ishst" ::: "memory")
+#define rmb() asm volatile("dmb ishld" ::: "memory")
#define cpu_relax() asm volatile("yield" ::: "memory")
#endif
Patches currently in stable-queue which might be from peterz@xxxxxxxxxxxxx are
queue-3.13/stop_machine-fix-2-race-between-stop_two_cpus-and-stop_cpus.patch
queue-3.13/perf-tools-fix-aaaaargh64-memory-barriers.patch
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