From: Ian Campbell <ian.campbell@citrix.com>
To: xen-devel@lists.xen.org
Cc: julien.grall@citrix.com, tim@xen.org,
Ian Campbell <ian.campbell@citrix.com>,
stefano.stabellini@eu.citrix.com
Subject: [PATCH 07/10] xen: arm: Use dmb for smp barriers
Date: Fri, 28 Jun 2013 17:10:53 +0100 [thread overview]
Message-ID: <1372435856-14040-7-git-send-email-ian.campbell@citrix.com> (raw)
In-Reply-To: <1372435809.8976.169.camel@zakaz.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>
---
xen/include/asm-arm/system.h | 8 ++++----
1 files 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))))
--
1.7.2.5
next prev parent reply other threads:[~2013-06-28 16:10 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 16:10 [PATCH 00/10] xen: arm: map normal memory as inner shareable, reduce scope of various barriers Ian Campbell
2013-06-28 16:10 ` [PATCH 01/10] xen: arm: map memory as inner shareable Ian Campbell
2013-07-01 15:39 ` Stefano Stabellini
2013-07-01 15:42 ` Ian Campbell
2013-07-02 14:09 ` Leif Lindholm
2013-07-02 14:26 ` Ian Campbell
2013-07-04 10:58 ` Tim Deegan
2013-07-04 11:03 ` Ian Campbell
2013-06-28 16:10 ` [PATCH 02/10] xen: arm: Only upgrade guest barriers to " Ian Campbell
2013-07-01 15:24 ` Stefano Stabellini
2013-07-04 10:58 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 03/10] xen: arm: reduce instruction cache and tlb flushes to inner-shareable Ian Campbell
2013-07-01 15:25 ` Stefano Stabellini
2013-07-04 11:07 ` Tim Deegan
2013-07-04 11:19 ` Tim Deegan
2013-07-04 11:21 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 04/10] xen: arm: consolidate barrier definitions Ian Campbell
2013-07-01 15:25 ` Stefano Stabellini
2013-07-04 11:07 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 05/10] xen: use SMP barrier in common code dealing with shared memory protocols Ian Campbell
2013-06-28 16:15 ` Ian Campbell
2013-06-28 16:20 ` Keir Fraser
2013-07-04 11:26 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 06/10] xen: arm: Use SMP barriers when that is all which is required Ian Campbell
2013-07-01 15:19 ` Stefano Stabellini
2013-07-01 15:24 ` Ian Campbell
2013-07-04 11:30 ` Tim Deegan
2013-06-28 16:10 ` Ian Campbell [this message]
2013-07-01 15:20 ` [PATCH 07/10] xen: arm: Use dmb for smp barriers Stefano Stabellini
2013-07-04 11:31 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 08/10] xen: arm: add scope to dsb and dmb macros Ian Campbell
2013-07-01 15:21 ` Stefano Stabellini
2013-07-01 15:22 ` Stefano Stabellini
2013-07-04 11:44 ` (no subject) Tim Deegan
2013-06-28 16:10 ` [PATCH 09/10] xen: arm: weaken SMP barriers to inner shareable Ian Campbell
2013-07-01 15:21 ` Stefano Stabellini
2013-07-01 15:22 ` Stefano Stabellini
2013-07-04 11:35 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 10/10] xen: arm: use more specific barriers for read and write barriers Ian Campbell
2013-07-01 15:22 ` Stefano Stabellini
2013-07-04 11:42 ` Tim Deegan
2013-07-04 11:46 ` Ian Campbell
2013-06-28 16:11 ` [PATCH 00/10] xen: arm: map normal memory as inner shareable, reduce scope of various barriers Ian Campbell
-- strict thread matches above, loose matches on Subject: below --
2013-07-04 11:32 (no subject) Tim Deegan
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