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From: Alexander Gordeev <agordeev@redhat.com>
To: kvm@vger.kernel.org
Cc: "Alexander Gordeev" <agordeev@redhat.com>,
	"Andrew Jones" <drjones@redhat.com>,
	"Thomas Huth" <thuth@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>
Subject: [PATCH v2 9/9] io: Disable memory re-ordering for generic memory barriers
Date: Wed, 27 Apr 2016 15:13:58 +0200	[thread overview]
Message-ID: <f6d9859b1ed22e4858afdba4f3157fb6683734dc.1461762419.git.agordeev@redhat.com> (raw)
In-Reply-To: <cover.1461762418.git.agordeev@redhat.com>

Suggested-by: Thomas Huth <thuth@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
 lib/asm-generic/io.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/asm-generic/io.h b/lib/asm-generic/io.h
index 28fe981..1710cc4 100644
--- a/lib/asm-generic/io.h
+++ b/lib/asm-generic/io.h
@@ -127,11 +127,14 @@ static inline u64 __bswap64(u64 x)
 	({ u64 __r = !__cpu_is_be() ? __bswap64(x) : ((u64)x); __r; })
 #define cpu_to_be64 be64_to_cpu
 
+#ifndef mb
+#define mb()	asm volatile("":::"memory")
+#endif
 #ifndef rmb
-#define rmb() do { } while (0)
+#define rmb()	asm volatile("":::"memory")
 #endif
 #ifndef wmb
-#define wmb() do { } while (0)
+#define wmb()	asm volatile("" ::: "memory")
 #endif
 
 #define readb(addr) \
-- 
1.8.3.1


  parent reply	other threads:[~2016-04-27 13:14 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-27 13:13 [PATCH v2 0/9] Cleanup low-level arch code Alexander Gordeev
2016-04-27 13:13 ` [PATCH v2 1/9] Remove unused and unnecessary PHYS32 macro Alexander Gordeev
2016-04-27 13:13 ` [PATCH v2 2/9] Move phys_addr_t type definition to lib/libcflat.h Alexander Gordeev
2016-04-27 13:42   ` Andrew Jones
2016-04-27 13:13 ` [PATCH v2 3/9] x86: Introduce lib/x86/asm/page.h Alexander Gordeev
2016-04-27 13:45   ` Andrew Jones
2016-04-27 13:13 ` [PATCH v2 4/9] x86: Introduce lib/x86/asm/io.h Alexander Gordeev
2016-04-27 13:46   ` Andrew Jones
2016-04-27 16:23     ` Alexander Gordeev
2016-04-28  9:24       ` Alexander Gordeev
2016-04-28 11:13         ` Andrew Jones
2016-04-27 13:51   ` Andrew Jones
2016-04-27 13:13 ` [PATCH v2 5/9] x86: Introduce lib/x86/asm/barrier.h Alexander Gordeev
2016-04-27 13:52   ` Andrew Jones
2016-04-27 16:26     ` Alexander Gordeev
2016-04-28 16:23       ` Alexander Gordeev
2016-04-28 17:00         ` Andrew Jones
2016-04-27 13:13 ` [PATCH v2 6/9] x86: Optimize virt_to_phys() and phys_to_virt() Alexander Gordeev
2016-04-27 13:58   ` Andrew Jones
2016-04-27 16:54     ` Alexander Gordeev
2016-04-27 18:19       ` Andrew Jones
2016-04-27 13:13 ` [PATCH v2 7/9] io: Make ioremap() prototype conform to Linux one Alexander Gordeev
2016-04-27 13:59   ` Andrew Jones
2016-04-27 13:13 ` [PATCH v2 8/9] io/x86: Factor out ioremap() Alexander Gordeev
2016-04-27 14:11   ` Andrew Jones
2016-04-27 13:13 ` Alexander Gordeev [this message]
2016-04-27 14:14   ` [PATCH v2 9/9] io: Disable memory re-ordering for generic memory barriers Andrew Jones
2016-04-27 13:34 ` [PATCH v2 0/9] Cleanup low-level arch code Andrew Jones

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