Commit 5aee405c authored Mar 06, 2006 by Atsushi Nemoto Committed by Linus Torvalds Mar 06, 2006

[PATCH] time: add barrier after updating jiffies_64



Add a compiler barrier so that we don't read jiffies before updating
jiffies_64.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent a615fa83

kernel/timer.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -941,6 +941,8 @@ static inline void update_times(void)
		void do_timer(struct pt_regs *regs)
		{
		jiffies_64++;
		/* prevent loading jiffies before storing new jiffies_64 value. */
		barrier();
		update_times();
		softlockup_tick(regs);
		}