[PATCH] timers: introduce try_to_del_timer_sync()

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This patch splits del_timer_sync() into 2 functions.  The new one,
try_to_del_timer_sync(), returns -1 when it hits executing timer.

It can be used in interrupt context, or when the caller hold locks which
can prevent completion of the timer's handler.

NOTE.  Currently it can't be used in interrupt context in UP case, because
->running_timer is used only with CONFIG_SMP.

Should the need arise, it is possible to kill #ifdef CONFIG_SMP in
set_running_timer(), it is cheap.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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This commit is contained in:

Oleg Nesterov 2005-06-23 00:08:59 -07:00 • committed by Linus Torvalds

parent 55c888d6d0

commit fd450b7318

2 changed files with 36 additions and 21 deletions

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53

kernel/timer.c

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