Commit-ID: a1cc5bcfcfca0b99f009b117785142dbdc3b87a3
Gitweb: http://git.kernel.org/tip/a1cc5bcfcfca0b99f009b117785142dbdc3b87a3
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Thu, 21 Apr 2016 20:35:25 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 5 May 2016 09:58:52 +0200
locking/atomics: Flip atomic_fetch_or() arguments
All the atomic operations have their arguments the wrong way around;
make atomic_fetch_or() consistent and flip them.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
include/linux/atomic.h | 4 ++--
kernel/time/tick-sched.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/linux/atomic.h b/include/linux/atomic.h
index 506c353..e451534 100644
--- a/include/linux/atomic.h
+++ b/include/linux/atomic.h
@@ -560,11 +560,11 @@ static inline int atomic_dec_if_positive(atomic_t *v)
/**
* atomic_fetch_or - perform *p |= mask and return old value of *p
- * @p: pointer to atomic_t
* @mask: mask to OR on the atomic_t
+ * @p: pointer to atomic_t
*/
#ifndef atomic_fetch_or
-static inline int atomic_fetch_or(atomic_t *p, int mask)
+static inline int atomic_fetch_or(int mask, atomic_t *p)
{
int old, val = atomic_read(p);
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 58e3310..3daa49f 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -262,7 +262,7 @@ static void tick_nohz_dep_set_all(atomic_t *dep,
{
int prev;
- prev = atomic_fetch_or(dep, BIT(bit));
+ prev = atomic_fetch_or(BIT(bit), dep);
if (!prev)
tick_nohz_full_kick_all();
}
@@ -292,7 +292,7 @@ void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit)
ts = per_cpu_ptr(&tick_cpu_sched, cpu);
- prev = atomic_fetch_or(&ts->tick_dep_mask, BIT(bit));
+ prev = atomic_fetch_or(BIT(bit), &ts->tick_dep_mask);
if (!prev) {
preempt_disable();
/* Perf needs local kick that is NMI safe */
--
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