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authorDavid S. Miller <davem@davemloft.net>2009-12-05 18:22:26 -0500
committerDavid S. Miller <davem@davemloft.net>2009-12-05 18:22:26 -0500
commit28b4d5cc17c20786848cdc07b7ea237a309776bb (patch)
treebae406a4b17229dcce7c11be5073f7a67665e477 /kernel/trace/trace_clock.c
parentd29cecda036f251aee4947f47eea0fe9ed8cc931 (diff)
parent96fa2b508d2d3fe040cf4ef2fffb955f0a537ea1 (diff)
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts: drivers/net/pcmcia/fmvj18x_cs.c drivers/net/pcmcia/nmclan_cs.c drivers/net/pcmcia/xirc2ps_cs.c drivers/net/wireless/ray_cs.c
Diffstat (limited to 'kernel/trace/trace_clock.c')
-rw-r--r--kernel/trace/trace_clock.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c
index 20c5f92e28a8..878c03f386ba 100644
--- a/kernel/trace/trace_clock.c
+++ b/kernel/trace/trace_clock.c
@@ -20,6 +20,8 @@
20#include <linux/ktime.h> 20#include <linux/ktime.h>
21#include <linux/trace_clock.h> 21#include <linux/trace_clock.h>
22 22
23#include "trace.h"
24
23/* 25/*
24 * trace_clock_local(): the simplest and least coherent tracing clock. 26 * trace_clock_local(): the simplest and least coherent tracing clock.
25 * 27 *
@@ -28,17 +30,17 @@
28 */ 30 */
29u64 notrace trace_clock_local(void) 31u64 notrace trace_clock_local(void)
30{ 32{
31 unsigned long flags;
32 u64 clock; 33 u64 clock;
34 int resched;
33 35
34 /* 36 /*
35 * sched_clock() is an architecture implemented, fast, scalable, 37 * sched_clock() is an architecture implemented, fast, scalable,
36 * lockless clock. It is not guaranteed to be coherent across 38 * lockless clock. It is not guaranteed to be coherent across
37 * CPUs, nor across CPU idle events. 39 * CPUs, nor across CPU idle events.
38 */ 40 */
39 raw_local_irq_save(flags); 41 resched = ftrace_preempt_disable();
40 clock = sched_clock(); 42 clock = sched_clock();
41 raw_local_irq_restore(flags); 43 ftrace_preempt_enable(resched);
42 44
43 return clock; 45 return clock;
44} 46}