linux-kernel - tools/perf: Fix AAAAARGH64 memory barriers

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Message-ID: <20140124154002.GF31570@twins.programming.kicks-ass.net>
Date:	Fri, 24 Jan 2014 16:40:02 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	Will Deacon <will.deacon@....com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>
Subject: tools/perf: Fix AAAAARGH64 memory barriers

Someone got the load and store barriers mixed up for AAAAARGH64.
Turn them the right side up.

Fixes: a94d342b9cb0 ("tools/perf: Add required memory barriers")
Reported-by: Will Deacon <will.deacon@....com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
---
 tools/perf/perf.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 3c2f213e979d..dd4c0d32fbae 100644
--- 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
 
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