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sched/swait: Rename to exclusive

Browse source 
Since swait basically implemented exclusive waits only, make sure
the API reflects that.

  $ git grep -l -e "\<swake_up\>"
		-e "\<swait_event[^ (]*"
		-e "\<prepare_to_swait\>" | while read file;
    do
	sed -i -e 's/\<swake_up\>/&_one/g'
	       -e 's/\<swait_event[^ (]*/&_exclusive/g'
	       -e 's/\<prepare_to_swait\>/&_exclusive/g' $file;
    done

With a few manual touch-ups.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: bigeasy@linutronix.de
Cc: oleg@redhat.com
Cc: paulmck@linux.vnet.ibm.com
Cc: pbonzini@redhat.com
Link: https://lkml.kernel.org/r/20180612083909.261946548@infradead.org
This commit is contained in:
Peter Zijlstra 2018-06-12 10:34:52 +02:00 • committed by Thomas Gleixner
parent 0abf17bc77
commit b3dae109fa
16 changed files with 48 additions and 48 deletions
Download patch file Download diff file Expand all files Collapse all files

24
include/linux/swait.h
View file

@ -16,7 +16,7 @@
* wait-queues, but the semantics are actually completely different, and
* every single user we have ever had has been buggy (or pointless).
*
* A "swake_up()" only wakes up _one_ waiter, which is not at all what
* A "swake_up_one()" only wakes up _one_ waiter, which is not at all what
* "wake_up()" does, and has led to problems. In other cases, it has
* been fine, because there's only ever one waiter (kvm), but in that
* case gthe whole "simple" wait-queue is just pointless to begin with,
@ -115,7 +115,7 @@ extern void __init_swait_queue_head(struct swait_queue_head *q, const char *name
* CPU0 - waker CPU1 - waiter
*
* for (;;) {
* @cond = true; prepare_to_swait(&wq_head, &wait, state);
* @cond = true; prepare_to_swait_exclusive(&wq_head, &wait, state);
* smp_mb(); // smp_mb() from set_current_state()
* if (swait_active(wq_head)) if (@cond)
* wake_up(wq_head); break;
@ -157,11 +157,11 @@ static inline bool swq_has_sleeper(struct swait_queue_head *wq)
return swait_active(wq);
}
extern void swake_up(struct swait_queue_head *q);
extern void swake_up_one(struct swait_queue_head *q);
extern void swake_up_all(struct swait_queue_head *q);
extern void swake_up_locked(struct swait_queue_head *q);
extern void prepare_to_swait(struct swait_queue_head *q, struct swait_queue *wait, int state);
extern void prepare_to_swait_exclusive(struct swait_queue_head *q, struct swait_queue *wait, int state);
extern long prepare_to_swait_event(struct swait_queue_head *q, struct swait_queue *wait, int state);
extern void __finish_swait(struct swait_queue_head *q, struct swait_queue *wait);
@ -196,7 +196,7 @@ __out: __ret; \
(void)___swait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, \
schedule())
#define swait_event(wq, condition) \
#define swait_event_exclusive(wq, condition) \
do { \
if (condition) \
break; \
@ -208,7 +208,7 @@ do { \
TASK_UNINTERRUPTIBLE, timeout, \
__ret = schedule_timeout(__ret))
#define swait_event_timeout(wq, condition, timeout) \
#define swait_event_timeout_exclusive(wq, condition, timeout) \
({ \
long __ret = timeout; \
if (!___wait_cond_timeout(condition)) \
@ -220,7 +220,7 @@ do { \
___swait_event(wq, condition, TASK_INTERRUPTIBLE, 0, \
schedule())
#define swait_event_interruptible(wq, condition) \
#define swait_event_interruptible_exclusive(wq, condition) \
({ \
int __ret = 0; \
if (!(condition)) \
@ -233,7 +233,7 @@ do { \
TASK_INTERRUPTIBLE, timeout, \
__ret = schedule_timeout(__ret))
#define swait_event_interruptible_timeout(wq, condition, timeout) \
#define swait_event_interruptible_timeout_exclusive(wq, condition, timeout)\
({ \
long __ret = timeout; \
if (!___wait_cond_timeout(condition)) \
@ -246,7 +246,7 @@ do { \
(void)___swait_event(wq, condition, TASK_IDLE, 0, schedule())
/**
* swait_event_idle - wait without system load contribution
* swait_event_idle_exclusive - wait without system load contribution
* @wq: the waitqueue to wait on
* @condition: a C expression for the event to wait for
*
@ -257,7 +257,7 @@ do { \
* condition and doesn't want to contribute to system load. Signals are
* ignored.
*/
#define swait_event_idle(wq, condition) \
#define swait_event_idle_exclusive(wq, condition) \
do { \
if (condition) \
break; \
@ -270,7 +270,7 @@ do { \
__ret = schedule_timeout(__ret))
/**
* swait_event_idle_timeout - wait up to timeout without load contribution
* swait_event_idle_timeout_exclusive - wait up to timeout without load contribution
* @wq: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @timeout: timeout at which we'll give up in jiffies
@ -288,7 +288,7 @@ do { \
* or the remaining jiffies (at least 1) if the @condition evaluated
* to %true before the @timeout elapsed.
*/
#define swait_event_idle_timeout(wq, condition, timeout) \
#define swait_event_idle_timeout_exclusive(wq, condition, timeout) \
({ \
long __ret = timeout; \
if (!___wait_cond_timeout(condition)) \