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time: Provide xtime_update()

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xtime_update() takes xtime_lock write locked and calls
do_timer(). Provided to replace the do_timer() calls in the
architecture code.

Signed-off-by: Torben Hohn <torbenh@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: johnstul@us.ibm.com
Cc: yong.zhang0@gmail.com
Cc: hch@infradead.org
LKML-Reference: <20110127145910.23248.21379.stgit@localhost>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Torben Hohn 2011-01-27 15:59:10 +01:00 • committed by Thomas Gleixner
commit f0af911a9d
2 changed files with 14 additions and 0 deletions
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1
include/linux/sched.h
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@ -2050,6 +2050,7 @@ extern void release_uids(struct user_namespace *ns);
#include <asm/current.h> #include <asm/current.h>
extern void do_timer(unsigned long ticks); extern void do_timer(unsigned long ticks);
extern void xtime_update(unsigned long ticks);
extern int wake_up_state(struct task_struct *tsk, unsigned int state); extern int wake_up_state(struct task_struct *tsk, unsigned int state);
extern int wake_up_process(struct task_struct *tsk); extern int wake_up_process(struct task_struct *tsk);

13
kernel/time/timekeeping.c
View file

@ -969,3 +969,16 @@ void get_xtime_and_monotonic_offset(struct timespec *xtim, struct timespec *wtom
*wtom = wall_to_monotonic; *wtom = wall_to_monotonic;
} while (read_seqretry(&xtime_lock, seq)); } while (read_seqretry(&xtime_lock, seq));
} }
/**
* xtime_update() - advances the timekeeping infrastructure
* @ticks: number of ticks, that have elapsed since the last call.
*
* Must be called with interrupts disabled.
*/
void xtime_update(unsigned long ticks)
{
write_seqlock(&xtime_lock);
do_timer(ticks);
write_sequnlock(&xtime_lock);
}