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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-05 12:53:36 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-05 12:53:36 -0500
commit96fa2b508d2d3fe040cf4ef2fffb955f0a537ea1 (patch)
tree3cec6d72a450735fe6b8ed996c7399f57c05a5cb /kernel/trace/trace_clock.c
parent7a797cdcca2b3c0031e580203f18d6c9483aaec5 (diff)
parentb8007ef7422270864eae523cb38d7522a53a94d3 (diff)
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (40 commits) tracing: Separate raw syscall from syscall tracer ring-buffer-benchmark: Add parameters to set produce/consumer priorities tracing, function tracer: Clean up strstrip() usage ring-buffer benchmark: Run producer/consumer threads at nice +19 tracing: Remove the stale include/trace/power.h tracing: Only print objcopy version warning once from recordmcount tracing: Prevent build warning: 'ftrace_graph_buf' defined but not used ring-buffer: Move access to commit_page up into function used tracing: do not disable interrupts for trace_clock_local ring-buffer: Add multiple iterations between benchmark timestamps kprobes: Sanitize struct kretprobe_instance allocations tracing: Fix to use __always_unused attribute compiler: Introduce __always_unused tracing: Exit with error if a weak function is used in recordmcount.pl tracing: Move conditional into update_funcs() in recordmcount.pl tracing: Add regex for weak functions in recordmcount.pl tracing: Move mcount section search to front of loop in recordmcount.pl tracing: Fix objcopy revision check in recordmcount.pl tracing: Check absolute path of input file in recordmcount.pl tracing: Correct the check for number of arguments in recordmcount.pl ...
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}