sched/wait: Collapse __wait_event_hrtimeout()
While not a whole-sale replacement like the others we can still reduce
the size of __wait_event_hrtimeout() considerably by noting that the
actual core of __wait_event_hrtimeout() is identical to what
___wait_event() generates.
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20131002092528.972793648@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/include/linux/wait.h b/include/linux/wait.h
index ec3683e..c065e8a 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -337,7 +337,6 @@
#define __wait_event_hrtimeout(wq, condition, timeout, state) \
({ \
int __ret = 0; \
- DEFINE_WAIT(__wait); \
struct hrtimer_sleeper __t; \
\
hrtimer_init_on_stack(&__t.timer, CLOCK_MONOTONIC, \
@@ -348,25 +347,15 @@
current->timer_slack_ns, \
HRTIMER_MODE_REL); \
\
- for (;;) { \
- prepare_to_wait(&wq, &__wait, state); \
- if (condition) \
- break; \
- if (state == TASK_INTERRUPTIBLE && \
- signal_pending(current)) { \
- __ret = -ERESTARTSYS; \
- break; \
- } \
+ ___wait_event(wq, condition, state, 0, __ret, \
if (!__t.task) { \
__ret = -ETIME; \
break; \
} \
- schedule(); \
- } \
+ schedule()); \
\
hrtimer_cancel(&__t.timer); \
destroy_hrtimer_on_stack(&__t.timer); \
- finish_wait(&wq, &__wait); \
__ret; \
})