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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2006-09-25 23:32:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:49:04 -0700 |
| commit | c5c6ba4e08ab9c9e390a0f3a7d9a5c332f5cc6ef (patch) | |
| tree | 4e13a9eebd8f3901dcc187c585369ef843d1e1a7 /include/linux/resume-trace.h | |
| parent | 7d145aa3abf4d96c91f37c012facd5cfbb9010d1 (diff) | |
| download | lwn-c5c6ba4e08ab9c9e390a0f3a7d9a5c332f5cc6ef.tar.gz lwn-c5c6ba4e08ab9c9e390a0f3a7d9a5c332f5cc6ef.zip | |
[PATCH] PM: Add pm_trace switch
Add the pm_trace attribute in /sys/power which has to be explicitly set to
one to really enable the "PM tracing" code compiled in when CONFIG_PM_TRACE
is set (which modifies the machine's CMOS clock in unpredictable ways).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/resume-trace.h')
| -rw-r--r-- | include/linux/resume-trace.h | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/include/linux/resume-trace.h b/include/linux/resume-trace.h index a376bd4ade39..81e9299ca148 100644 --- a/include/linux/resume-trace.h +++ b/include/linux/resume-trace.h @@ -3,21 +3,25 @@ #ifdef CONFIG_PM_TRACE +extern int pm_trace_enabled; + struct device; extern void set_trace_device(struct device *); extern void generate_resume_trace(void *tracedata, unsigned int user); #define TRACE_DEVICE(dev) set_trace_device(dev) -#define TRACE_RESUME(user) do { \ - void *tracedata; \ - asm volatile("movl $1f,%0\n" \ - ".section .tracedata,\"a\"\n" \ - "1:\t.word %c1\n" \ - "\t.long %c2\n" \ - ".previous" \ - :"=r" (tracedata) \ - : "i" (__LINE__), "i" (__FILE__)); \ - generate_resume_trace(tracedata, user); \ +#define TRACE_RESUME(user) do { \ + if (pm_trace_enabled) { \ + void *tracedata; \ + asm volatile("movl $1f,%0\n" \ + ".section .tracedata,\"a\"\n" \ + "1:\t.word %c1\n" \ + "\t.long %c2\n" \ + ".previous" \ + :"=r" (tracedata) \ + : "i" (__LINE__), "i" (__FILE__)); \ + generate_resume_trace(tracedata, user); \ + } \ } while (0) #else |