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authorThomas Gleixner <tglx@linutronix.de>2011-05-20 16:18:50 +0200
committerThomas Gleixner <tglx@linutronix.de>2011-05-23 13:59:53 +0200
commit9ec2690758a5467f24beb301cca5098078073bba (patch)
treee5bc78f690d12635a56460ea6f54b49318221dc8 /include
parent250f972d85effad5b6e10da4bbd877e6a4b503b6 (diff)
downloadlinux-9ec2690758a5467f24beb301cca5098078073bba.tar.bz2
timerfd: Manage cancelable timers in timerfd
Peter is concerned about the extra scan of CLOCK_REALTIME_COS in the timer interrupt. Yes, I did not think about it, because the solution was so elegant. I didn't like the extra list in timerfd when it was proposed some time ago, but with a rcu based list the list walk it's less horrible than the original global lock, which was held over the list iteration. Requested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Peter Zijlstra <peterz@infradead.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hrtimer.h6
-rw-r--r--include/linux/time.h6
-rw-r--r--include/linux/timerfd.h4
3 files changed, 7 insertions, 9 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index eda4ccde0730..925c8c01db7b 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -155,7 +155,6 @@ enum hrtimer_base_type {
HRTIMER_BASE_REALTIME,
HRTIMER_BASE_MONOTONIC,
HRTIMER_BASE_BOOTTIME,
- HRTIMER_BASE_REALTIME_COS,
HRTIMER_MAX_CLOCK_BASES,
};
@@ -306,6 +305,11 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer)
#endif
extern void clock_was_set(void);
+#ifdef CONFIG_TIMERFD
+extern void timerfd_clock_was_set(void);
+#else
+static inline void timerfd_clock_was_set(void) { }
+#endif
extern void hrtimers_resume(void);
extern ktime_t ktime_get(void);
diff --git a/include/linux/time.h b/include/linux/time.h
index a9242773eb24..b3061782dec3 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -302,12 +302,6 @@ struct itimerval {
* The IDs of various hardware clocks:
*/
#define CLOCK_SGI_CYCLE 10
-
-#ifdef __KERNEL__
-/* This clock is not exposed to user space */
-#define CLOCK_REALTIME_COS 15
-#endif
-
#define MAX_CLOCKS 16
#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
#define CLOCKS_MONO CLOCK_MONOTONIC
diff --git a/include/linux/timerfd.h b/include/linux/timerfd.h
index e9571fc8f1a0..d3b57fa12225 100644
--- a/include/linux/timerfd.h
+++ b/include/linux/timerfd.h
@@ -19,7 +19,7 @@
* shared O_* flags.
*/
#define TFD_TIMER_ABSTIME (1 << 0)
-#define TFD_TIMER_CANCELON_SET (1 << 1)
+#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
#define TFD_CLOEXEC O_CLOEXEC
#define TFD_NONBLOCK O_NONBLOCK
@@ -27,6 +27,6 @@
/* Flags for timerfd_create. */
#define TFD_CREATE_FLAGS TFD_SHARED_FCNTL_FLAGS
/* Flags for timerfd_settime. */
-#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCELON_SET)
+#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)
#endif /* _LINUX_TIMERFD_H */