linux/drivers/base/power/trace.c, branch v4.9

char/genrtc: x86: remove remnants of asm/rtc.h

2016-06-03T22:20:07Z

Commit 3195ef59cb42 ("x86: Do full rtc synchronization with ntp") had the side-effect of unconditionally enabling the RTC_LIB symbol on x86, which in turn disables the selection of the CONFIG_RTC and CONFIG_GEN_RTC drivers that contain a two older implementations of the CONFIG_RTC_DRV_CMOS driver. This removes x86 from the list for genrtc, and changes all references to the asm/rtc.h header to instead point to the interfaces from linux/mc146818rtc.h. Signed-off-by: Arnd Bergmann Acked-by: Geert Uytterhoeven Signed-off-by: Alexandre Belloni

PM / sleep: declare __tracedata symbols as char[] rather than char

2016-02-11T10:07:08Z

Accessing more than one byte from a symbol declared simply 'char' is undefined behavior, as reported by UBSAN: UBSAN: Undefined behaviour in drivers/base/power/trace.c:178:18 load of address ffffffff8203fc78 with insufficient space for an object of type 'char' Avoid this by declaring the symbols as arrays. Signed-off-by: Eric Biggers Signed-off-by: Rafael J. Wysocki

PM / sleep: add pm-trace support for suspending phase

2015-03-18T14:54:27Z

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

drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required.

2011-10-31T23:31:38Z

Most of these files were implicitly getting EXPORT_SYMBOL via device.h which was including module.h, but that path will be broken soon. [ with input from Stephen Rothwell ] Signed-off-by: Paul Gortmaker

PM: Add "RTC" to PM trace time stamps to avoid confusion

2011-07-15T21:58:19Z

Some users are apparently confused by dmesg output from read_magic_time(), which looks like "real" time and date. Add the "RTC" string to time stamps printed by read_magic_time() to avoid that confusion. Reported-by: Justin P. Mattock Signed-off-by: Rafael J. Wysocki

PM: Use appropriate printk() priority level in trace.c

2011-03-14T23:43:14Z

printk()s without a priority level default to KERN_WARNING. To reduce noise at KERN_WARNING, this patch sets the priority level appriopriately for unleveled printks()s. This should be useful to folks that look at dmesg warnings closely. Changed these messages to pr_info(). Signed-off-by: Mandeep Singh Baines Signed-off-by: Rafael J. Wysocki

PM: Add sysfs attr for rechecking dev hash from PM trace

2010-10-16T23:57:50Z

If the device which fails to resume is part of a loadable kernel module it won't be checked at startup against the magic number stored in the RTC. Add a read-only sysfs attribute /sys/power/pm_trace_dev_match which contains a list of newline separated devices (usually just the one) which currently match the last magic number. This allows the device which is failing to resume to be found after the modules are loaded again. Signed-off-by: James Hogan Signed-off-by: Rafael J. Wysocki

PM: Lock PM device list mutex in show_dev_hash()

2010-10-16T23:57:50Z

Lock the PM device list mutex using device_pm_lock() and device_pm_unlock() around the list iteration in show_dev_hash(). show_dev_hash() was reverse iterating dpm_list without first locking the mutex that the functions in drivers/base/power/main.c lock. I assume this was unintentional since there is no comment suggesting why the lock might not be necessary. Signed-off-by: James Hogan Signed-off-by: Rafael J. Wysocki

driver core: struct device - replace bus_id with dev_name(), dev_set_name()

2009-01-06T18:44:31Z

Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman

driver core: fix a lot of printk usages of bus_id

2008-07-22T04:54:53Z

We have the dev_printk() variants for this kind of thing, use them instead of directly trying to access the bus_id field of struct device. This is done in order to remove bus_id entirely. Cc: Kay Sievers Signed-off-by: Greg Kroah-Hartman