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https://github.com/edk2-porting/linux-next.git
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c5c6ba4e08
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>
35 lines
759 B
C
35 lines
759 B
C
#ifndef RESUME_TRACE_H
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#define RESUME_TRACE_H
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#ifdef CONFIG_PM_TRACE
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extern int pm_trace_enabled;
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struct device;
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extern void set_trace_device(struct device *);
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extern void generate_resume_trace(void *tracedata, unsigned int user);
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#define TRACE_DEVICE(dev) set_trace_device(dev)
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#define TRACE_RESUME(user) do { \
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if (pm_trace_enabled) { \
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void *tracedata; \
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asm volatile("movl $1f,%0\n" \
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".section .tracedata,\"a\"\n" \
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"1:\t.word %c1\n" \
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"\t.long %c2\n" \
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".previous" \
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:"=r" (tracedata) \
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: "i" (__LINE__), "i" (__FILE__)); \
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generate_resume_trace(tracedata, user); \
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} \
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} while (0)
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#else
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#define TRACE_DEVICE(dev) do { } while (0)
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#define TRACE_RESUME(dev) do { } while (0)
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#endif
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#endif
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