From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org,
Stephane Eranian <eranian@google.com>,
Robert Richter <robert.richter@amd.com>,
Tejun Heo <tj@kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 1/6] percpu: {get,put}_cpu_ptr
Date: Fri, 17 Sep 2010 11:28:45 +0200 [thread overview]
Message-ID: <20100917093009.252867712@chello.nl> (raw)
In-Reply-To: 20100917092844.651383640@chello.nl
[-- Attachment #1: percpu-get-cpu-ptr.patch --]
[-- Type: text/plain, Size: 769 bytes --]
Similar to {get,put}_cpu_var() except for dynamically allocated per-cpu memory.
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
include/linux/percpu.h | 9 +++++++++
1 file changed, 9 insertions(+)
Index: linux-2.6/include/linux/percpu.h
===================================================================
--- linux-2.6.orig/include/linux/percpu.h
+++ linux-2.6/include/linux/percpu.h
@@ -39,6 +39,15 @@
preempt_enable(); \
} while (0)
+#define get_cpu_ptr(var) ({ \
+ preempt_disable(); \
+ this_cpu_ptr(var); })
+
+#define put_cpu_ptr(var) do { \
+ (void)(var); \
+ preempt_enable(); \
+} while (0)
+
#ifdef CONFIG_SMP
/* minimum unit size, also is the maximum supported allocation size */
next prev parent reply other threads:[~2010-09-17 9:34 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-17 9:28 [PATCH 0/6] Various perf fixes Peter Zijlstra
2010-09-17 9:28 ` Peter Zijlstra [this message]
2010-09-19 15:09 ` [PATCH 1/6] percpu: {get,put}_cpu_ptr Tejun Heo
2010-09-21 14:13 ` [tip:perf/core] percpu: Add {get,put}_cpu_ptr tip-bot for Peter Zijlstra
2010-09-17 9:28 ` [PATCH 2/6] perf: Avoid RCU vs preemption assumptions Peter Zijlstra
2010-09-21 14:13 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-09-17 9:28 ` [PATCH 3/6] perf_events: Fix broken event grouping Peter Zijlstra
2010-09-17 11:27 ` [tip:perf/core] " tip-bot for Stephane Eranian
2010-09-17 9:28 ` [PATCH 4/6] perf: Complete software pmu grouping Peter Zijlstra
2010-09-17 11:28 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-09-17 9:28 ` [PATCH 5/6] perf: Fix perf_event_exit_cpu_context() Peter Zijlstra
2010-09-17 11:28 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-09-17 9:28 ` [PATCH 6/6] perf: Undo the per cpu-context timer stuff Peter Zijlstra
2010-09-17 11:29 ` [tip:perf/core] " tip-bot for Peter Zijlstra
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