From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com,
bobby.prani@gmail.com,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
<linuxppc-dev@lists.ozlabs.org>
Subject: [PATCH tip/core/rcu 09/15] powerpc: Fix smp_mb__before_spinlock()
Date: Tue, 12 May 2015 14:38:15 -0700 [thread overview]
Message-ID: <1431466701-653-9-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <1431466701-653-1-git-send-email-paulmck@linux.vnet.ibm.com>
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Currently, smp_mb__before_spinlock() is defined to be smp_wmb()
in core code, but this is not sufficient on PowerPC. This patch
therefore supplies an override for the generic definition to
strengthen smp_mb__before_spinlock() to smp_mb(), as is needed
on PowerPC.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <linuxppc-dev@lists.ozlabs.org>
---
arch/powerpc/include/asm/barrier.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h
index a3bf5be111ff..1124f59b8df4 100644
--- a/arch/powerpc/include/asm/barrier.h
+++ b/arch/powerpc/include/asm/barrier.h
@@ -89,5 +89,6 @@ do { \
#define smp_mb__before_atomic() smp_mb()
#define smp_mb__after_atomic() smp_mb()
+#define smp_mb__before_spinlock() smp_mb()
#endif /* _ASM_POWERPC_BARRIER_H */
--
1.8.1.5
next prev parent reply other threads:[~2015-05-12 21:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 21:37 [PATCH tip/core/rcu 0/15] Miscellaneous fixes for 4.2 Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 01/15] rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE() Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 02/15] rcu: Convert from rcu_preempt_state to *rcu_state_p Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 03/15] rcu: Eliminate a few RCU_BOOST #ifdefs in favor of IS_ENABLED() Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 04/15] rcu: Tell the compiler that rcu_state_p is immutable Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 05/15] rcu: Create an immutable rcu_data_p pointer to default rcu_data structure Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 06/15] rcu: Eliminate a few CONFIG_RCU_NOCB_CPU_ALL #ifdefs Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 07/15] rcu: Force wakeup of rcu_gp_kthread at grace-period end Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 08/15] rcu: tree_plugin: Use bool function return values of true/false not 1/0 Paul E. McKenney
2015-05-12 21:38 ` Paul E. McKenney [this message]
2015-05-12 21:38 ` [PATCH tip/core/rcu 10/15] rcu: Fix missing task information during rcu-preempt stall Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 11/15] rcu: Add more debug info on "kthread starved" RCU CPU stall warnings Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 12/15] smp: Make control dependencies work on Alpha, improve documentation Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 13/15] rcu: Make synchronize_sched_expedited() call wait_rcu_gp() Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 14/15] rcu: Make rcu_*_data variables static Paul E. McKenney
2015-05-12 21:38 ` [PATCH tip/core/rcu 15/15] rcu: Change function declaration to bool Paul E. McKenney
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