From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-arch@vger.kernel.org,
Andrew Cooper <andrew.cooper3@citrix.com>,
virtualization@lists.linux-foundation.org,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>, Ingo Molnar <mingo@kernel.org>,
Davidlohr Bueso <dbueso@suse.de>,
Andrey Konovalov <andreyknvl@google.com>,
linux-ia64@vger.kernel.org
Subject: [PATCH 20/34] ia64: define __smp_xxx
Date: Wed, 30 Dec 2015 13:25:40 +0000 [thread overview]
Message-ID: <1451473761-30019-21-git-send-email-mst@redhat.com> (raw)
In-Reply-To: <1451473761-30019-1-git-send-email-mst@redhat.com>
This defines __smp_XXX barriers for ia64,
for use by virtualization.
smp_XXX barriers are removed as they are
defined correctly by asm-generic/barriers.h
This reduces the amount of arch-specific boiler-plate code.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
arch/ia64/include/asm/barrier.h | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/arch/ia64/include/asm/barrier.h b/arch/ia64/include/asm/barrier.h
index 2f93348..588f161 100644
--- a/arch/ia64/include/asm/barrier.h
+++ b/arch/ia64/include/asm/barrier.h
@@ -42,28 +42,24 @@
#define dma_rmb() mb()
#define dma_wmb() mb()
-#ifdef CONFIG_SMP
-# define smp_mb() mb()
-#else
-# define smp_mb() barrier()
-#endif
+# define __smp_mb() mb()
-#define smp_mb__before_atomic() barrier()
-#define smp_mb__after_atomic() barrier()
+#define __smp_mb__before_atomic() barrier()
+#define __smp_mb__after_atomic() barrier()
/*
* IA64 GCC turns volatile stores into st.rel and volatile loads into ld.acq no
* need for asm trickery!
*/
-#define smp_store_release(p, v) \
+#define __smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
barrier(); \
WRITE_ONCE(*p, v); \
} while (0)
-#define smp_load_acquire(p) \
+#define __smp_load_acquire(p) \
({ \
typeof(*p) ___p1 = READ_ONCE(*p); \
compiletime_assert_atomic_type(*p); \
--
MST
prev parent reply other threads:[~2015-12-30 13:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1451473761-30019-1-git-send-email-mst@redhat.com>
2015-12-30 13:24 ` [PATCH 03/34] ia64: rename nop->iosapic_nop Michael S. Tsirkin
2015-12-30 16:39 ` Luck, Tony
2015-12-30 13:24 ` [PATCH 04/34] ia64: reuse asm-generic/barrier.h Michael S. Tsirkin
2015-12-30 16:41 ` Luck, Tony
2015-12-30 13:25 ` Michael S. Tsirkin [this message]
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