From: Ian Campbell <ian.campbell@citrix.com>
To: xen-devel@lists.xen.org
Cc: julien.grall@linaro.org, tim@xen.org,
Ian Campbell <ian.campbell@citrix.com>,
stefano.stabellini@eu.citrix.com
Subject: [PATCH for-4.5 v2 5/8] xen: arm: Use dmb for smp barriers
Date: Thu, 13 Feb 2014 12:38:05 +0000 [thread overview]
Message-ID: <1392295088-24219-5-git-send-email-ian.campbell@citrix.com> (raw)
In-Reply-To: <1392295040.31985.7.camel@kazak.uk.xensource.com>
The full power of dsb is not required in this context.
Also change wmb() to be dsb() directly instead of indirectly via mb(), for
clarity.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
---
xen/include/asm-arm/system.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h
index e003624..89c61ef 100644
--- a/xen/include/asm-arm/system.h
+++ b/xen/include/asm-arm/system.h
@@ -18,11 +18,11 @@
#define mb() dsb()
#define rmb() dsb()
-#define wmb() mb()
+#define wmb() dsb()
-#define smp_mb() mb()
-#define smp_rmb() rmb()
-#define smp_wmb() wmb()
+#define smp_mb() dmb()
+#define smp_rmb() dmb()
+#define smp_wmb() dmb()
#define xchg(ptr,x) \
((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
--
1.7.10.4
next prev parent reply other threads:[~2014-02-13 12:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-13 12:37 [PATCH for-4.5 v2 0/8] xen: arm: map normal memory as inner shareable, reduce scope of various barriers Ian Campbell
2014-02-13 12:38 ` [PATCH for-4.5 v2 1/8] xen: arm: map memory as inner shareable Ian Campbell
2014-02-13 12:38 ` [PATCH for-4.5 v2 2/8] xen: arm: Only upgrade guest barriers to " Ian Campbell
2014-02-13 12:38 ` [PATCH for-4.5 v2 3/8] xen: arm: consolidate barrier definitions Ian Campbell
2014-02-13 12:38 ` [PATCH for-4.5 v2 4/8] xen: arm: Use SMP barriers when that is all which is required Ian Campbell
2014-02-13 12:38 ` Ian Campbell [this message]
2014-02-13 12:38 ` [PATCH for-4.5 v2 6/8] xen: arm: add scope to dsb and dmb macros Ian Campbell
2014-02-13 12:38 ` [PATCH for-4.5 v2 7/8] xen: arm: weaken SMP barriers to inner shareable Ian Campbell
2014-02-13 12:38 ` [PATCH for-4.5 v2 8/8] xen: arm: use more specific barriers for read and write barriers Ian Campbell
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