time: Provide xtime_update() (f0af911a) · Commits · 戴 / test

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>

include/linux/sched.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -2050,6 +2050,7 @@ extern void release_uids(struct user_namespace *ns);
		#include <asm/current.h>

		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_process(struct task_struct *tsk);

kernel/time/timekeeping.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -969,3 +969,16 @@ void get_xtime_and_monotonic_offset(struct timespec xtim, struct timespec wtom
		*wtom = wall_to_monotonic;
		} 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);
		}

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