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| author |   Peter Zijlstra <peterz@infradead.org> | 2013-08-14 14:55:24 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2013-09-25 14:07:32 +0200 |
| commit | 4a2b4b222743bb07fedf985b884550f2ca067ea9 (patch) | |
| tree | 587e80512c6cdf727b27d0f806758833547a65ed /kernel/timer.c | |
| parent | sched, idle: Fix the idle polling state logic (diff) | |
| download | linux-dev-4a2b4b222743bb07fedf985b884550f2ca067ea9.tar.xz linux-dev-4a2b4b222743bb07fedf985b884550f2ca067ea9.zip | |
sched: Introduce preempt_count accessor functions
Replace the single preempt_count() 'function' that's an lvalue with
two proper functions:
preempt_count() - returns the preempt_count value as rvalue
preempt_count_set() - Allows setting the preempt-count value
Also provide preempt_count_ptr() as a convenience wrapper to implement
all modifying operations.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-orxrbycjozopqfhb4dxdkdvb@git.kernel.org
[ Fixed build failure. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index 4296d13db3d1..6582b82fa966 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1092,7 +1092,7 @@ static int cascade(struct tvec_base *base, struct tvec *tv, int index) static void call_timer_fn(struct timer_list *timer, void (*fn)(unsigned long), unsigned long data) { - int preempt_count = preempt_count(); + int count = preempt_count(); #ifdef CONFIG_LOCKDEP /* @@ -1119,16 +1119,16 @@ static void call_timer_fn(struct timer_list *timer, void (*fn)(unsigned long), lock_map_release(&lockdep_map); - if (preempt_count != preempt_count()) { + if (count != preempt_count()) { WARN_ONCE(1, "timer: %pF preempt leak: %08x -> %08x\n", - fn, preempt_count, preempt_count()); + fn, count, preempt_count()); /* * Restore the preempt count. That gives us a decent * chance to survive and extract information. If the * callback kept a lock held, bad luck, but not worse * than the BUG() we had. */ - preempt_count() = preempt_count; + preempt_count_set(count); } } |