From 431d452af13720463dda498999b2e9a08729c03a Mon Sep 17 00:00:00 2001 From: Zhonghui Fu Date: Wed, 18 Mar 2015 15:54:27 +0100 Subject: PM / sleep: add pm-trace support for suspending phase Occasionally, the system can't come back up after suspend/resume due to problems of device suspending phase. This patch make PM_TRACE infrastructure cover device suspending phase of suspend/resume process, and the information in RTC can tell developers which device suspending function make system hang. Signed-off-by: Zhonghui Fu Signed-off-by: Rafael J. Wysocki --- include/linux/pm-trace.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 include/linux/pm-trace.h (limited to 'include/linux/pm-trace.h') diff --git a/include/linux/pm-trace.h b/include/linux/pm-trace.h new file mode 100644 index 000000000000..ecbde7a5548e --- /dev/null +++ b/include/linux/pm-trace.h @@ -0,0 +1,35 @@ +#ifndef PM_TRACE_H +#define PM_TRACE_H + +#ifdef CONFIG_PM_TRACE +#include +#include + +extern int pm_trace_enabled; + +static inline int pm_trace_is_enabled(void) +{ + return pm_trace_enabled; +} + +struct device; +extern void set_trace_device(struct device *); +extern void generate_pm_trace(const void *tracedata, unsigned int user); +extern int show_trace_dev_match(char *buf, size_t size); + +#define TRACE_DEVICE(dev) do { \ + if (pm_trace_enabled) \ + set_trace_device(dev); \ + } while(0) + +#else + +static inline int pm_trace_is_enabled(void) { return 0; } + +#define TRACE_DEVICE(dev) do { } while (0) +#define TRACE_RESUME(dev) do { } while (0) +#define TRACE_SUSPEND(dev) do { } while (0) + +#endif + +#endif -- cgit v1.2.3-59-g8ed1b