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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-04 13:06:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-04 13:06:34 -0700
commitdd90cccffc20a15d8e4c3ac8813f4b6a6cd4766f (patch)
treeb870506b456e3b965638035abb0b2c944b024fd9 /kernel/time
parentb1b6f83ac938d176742c85757960dec2cf10e468 (diff)
parent51218298a25e6942957c5595f2abf130d47d5df9 (diff)
downloadlinux-dd90cccffc20a15d8e4c3ac8813f4b6a6cd4766f.tar.bz2
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner: "A rather small update for the time(r) subsystem: - A new clocksource driver IMX-TPM - Minor fixes to the alarmtimer facility - Device tree cleanups for Renesas drivers - A new kselftest and fixes for the timer related tests - Conversion of the clocksource drivers to use %pOF - Use the proper helpers to access rlimits in the posix-cpu-timer code" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimer: Ensure RTC module is not unloaded clocksource: Convert to using %pOF instead of full_name clocksource/drivers/bcm2835: Remove message for a memory allocation failure devicetree: bindings: Remove deprecated properties devicetree: bindings: Remove unused 32-bit CMT bindings devicetree: bindings: Deprecate property, update example devicetree: bindings: r8a73a4 and R-Car Gen2 CMT bindings devicetree: bindings: R-Car Gen2 CMT0 and CMT1 bindings devicetree: bindings: Remove sh7372 CMT binding clocksource/drivers/imx-tpm: Add imx tpm timer support dt-bindings: timer: Add nxp tpm timer binding doc posix-cpu-timers: Use dedicated helper to access rlimit values alarmtimer: Fix unavailable wake-up source in sysfs timekeeping: Use proper timekeeper for debug code kselftests: timers: set-timer-lat: Add one-shot timer test cases kselftests: timers: set-timer-lat: Tweak reporting when timer fires early kselftests: timers: freq-step: Fix build warning kselftests: timers: freq-step: Define ADJ_SETOFFSET if device has older kernel headers
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/alarmtimer.c17
-rw-r--r--kernel/time/posix-cpu-timers.c14
-rw-r--r--kernel/time/timekeeping.c2
3 files changed, 22 insertions, 11 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 0b8ff7d257ea..ec09ce9a6012 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -28,6 +28,7 @@
#include <linux/workqueue.h>
#include <linux/freezer.h>
#include <linux/compat.h>
+#include <linux/module.h>
#include "posix-timers.h"
@@ -56,9 +57,9 @@ static ktime_t freezer_delta;
static DEFINE_SPINLOCK(freezer_delta_lock);
#endif
+#ifdef CONFIG_RTC_CLASS
static struct wakeup_source *ws;
-#ifdef CONFIG_RTC_CLASS
/* rtc timer and device for setting alarm wakeups at suspend */
static struct rtc_timer rtctimer;
static struct rtc_device *rtcdev;
@@ -89,6 +90,7 @@ static int alarmtimer_rtc_add_device(struct device *dev,
{
unsigned long flags;
struct rtc_device *rtc = to_rtc_device(dev);
+ struct wakeup_source *__ws;
if (rtcdev)
return -EBUSY;
@@ -98,13 +100,25 @@ static int alarmtimer_rtc_add_device(struct device *dev,
if (!device_may_wakeup(rtc->dev.parent))
return -1;
+ __ws = wakeup_source_register("alarmtimer");
+
spin_lock_irqsave(&rtcdev_lock, flags);
if (!rtcdev) {
+ if (!try_module_get(rtc->owner)) {
+ spin_unlock_irqrestore(&rtcdev_lock, flags);
+ return -1;
+ }
+
rtcdev = rtc;
/* hold a reference so it doesn't go away */
get_device(dev);
+ ws = __ws;
+ __ws = NULL;
}
spin_unlock_irqrestore(&rtcdev_lock, flags);
+
+ wakeup_source_unregister(__ws);
+
return 0;
}
@@ -860,7 +874,6 @@ static int __init alarmtimer_init(void)
error = PTR_ERR(pdev);
goto out_drv;
}
- ws = wakeup_source_register("alarmtimer");
return 0;
out_drv:
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index a3bd5dbe0dc4..8585ad6e472a 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -799,7 +799,6 @@ static void check_thread_timers(struct task_struct *tsk,
struct list_head *firing)
{
struct list_head *timers = tsk->cpu_timers;
- struct signal_struct *const sig = tsk->signal;
struct task_cputime *tsk_expires = &tsk->cputime_expires;
u64 expires;
unsigned long soft;
@@ -823,10 +822,9 @@ static void check_thread_timers(struct task_struct *tsk,
/*
* Check for the special case thread timers.
*/
- soft = READ_ONCE(sig->rlim[RLIMIT_RTTIME].rlim_cur);
+ soft = task_rlimit(tsk, RLIMIT_RTTIME);
if (soft != RLIM_INFINITY) {
- unsigned long hard =
- READ_ONCE(sig->rlim[RLIMIT_RTTIME].rlim_max);
+ unsigned long hard = task_rlimit_max(tsk, RLIMIT_RTTIME);
if (hard != RLIM_INFINITY &&
tsk->rt.timeout > DIV_ROUND_UP(hard, USEC_PER_SEC/HZ)) {
@@ -847,7 +845,8 @@ static void check_thread_timers(struct task_struct *tsk,
*/
if (soft < hard) {
soft += USEC_PER_SEC;
- sig->rlim[RLIMIT_RTTIME].rlim_cur = soft;
+ tsk->signal->rlim[RLIMIT_RTTIME].rlim_cur =
+ soft;
}
if (print_fatal_signals) {
pr_info("RT Watchdog Timeout (soft): %s[%d]\n",
@@ -938,11 +937,10 @@ static void check_process_timers(struct task_struct *tsk,
SIGPROF);
check_cpu_itimer(tsk, &sig->it[CPUCLOCK_VIRT], &virt_expires, utime,
SIGVTALRM);
- soft = READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_cur);
+ soft = task_rlimit(tsk, RLIMIT_CPU);
if (soft != RLIM_INFINITY) {
unsigned long psecs = div_u64(ptime, NSEC_PER_SEC);
- unsigned long hard =
- READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_max);
+ unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU);
u64 x;
if (psecs >= hard) {
/*
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 7e7e61c00d61..8ea4fb315719 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -2064,7 +2064,7 @@ void update_wall_time(void)
goto out;
/* Do some additional sanity checking */
- timekeeping_check_update(real_tk, offset);
+ timekeeping_check_update(tk, offset);
/*
* With NO_HZ we may have to accumulate many cycle_intervals