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authorTejun Heo <tj@kernel.org>2012-08-21 01:51:23 +0400
committerTejun Heo <tj@kernel.org>2012-08-21 01:51:23 +0400
commitae930e0f4e66fd540c6fbad9f1e2a7743d8b9afe (patch)
tree88853ec727834081a79d56bb9829191ca6e243ec
parent606a5020b9bdceb20b4f43e11db0054afa349028 (diff)
downloadlinux-ae930e0f4e66fd540c6fbad9f1e2a7743d8b9afe.tar.xz
workqueue: gut system_nrt[_freezable]_wq()
Now that all workqueues are non-reentrant, system[_freezable]_wq() are equivalent to system_nrt[_freezable]_wq(). Replace the latter with wrappers around system[_freezable]_wq(). The wrapping goes through inline functions so that __deprecated can be added easily. Signed-off-by: Tejun Heo <tj@kernel.org>
-rw-r--r--include/linux/workqueue.h23
-rw-r--r--kernel/workqueue.c10
2 files changed, 15 insertions, 18 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 4f9d3bc161a2..855fcdaa2d72 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -297,10 +297,6 @@ enum {
* system_long_wq is similar to system_wq but may host long running
* works. Queue flushing might take relatively long.
*
- * system_nrt_wq is non-reentrant and guarantees that any given work
- * item is never executed in parallel by multiple CPUs. Queue
- * flushing might take relatively long.
- *
* system_unbound_wq is unbound workqueue. Workers are not bound to
* any specific CPU, not concurrency managed, and all queued works are
* executed immediately as long as max_active limit is not reached and
@@ -308,16 +304,25 @@ enum {
*
* system_freezable_wq is equivalent to system_wq except that it's
* freezable.
- *
- * system_nrt_freezable_wq is equivalent to system_nrt_wq except that
- * it's freezable.
*/
extern struct workqueue_struct *system_wq;
extern struct workqueue_struct *system_long_wq;
-extern struct workqueue_struct *system_nrt_wq;
extern struct workqueue_struct *system_unbound_wq;
extern struct workqueue_struct *system_freezable_wq;
-extern struct workqueue_struct *system_nrt_freezable_wq;
+
+static inline struct workqueue_struct *__system_nrt_wq(void)
+{
+ return system_wq;
+}
+
+static inline struct workqueue_struct *__system_nrt_freezable_wq(void)
+{
+ return system_freezable_wq;
+}
+
+/* equivlalent to system_wq and system_freezable_wq, deprecated */
+#define system_nrt_wq __system_nrt_wq()
+#define system_nrt_freezable_wq __system_nrt_freezable_wq()
extern struct workqueue_struct *
__alloc_workqueue_key(const char *fmt, unsigned int flags, int max_active,
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 5f13a9a2c792..85bd3409b9f5 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -274,14 +274,10 @@ struct workqueue_struct *system_highpri_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_highpri_wq);
struct workqueue_struct *system_long_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_long_wq);
-struct workqueue_struct *system_nrt_wq __read_mostly;
-EXPORT_SYMBOL_GPL(system_nrt_wq);
struct workqueue_struct *system_unbound_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_unbound_wq);
struct workqueue_struct *system_freezable_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_freezable_wq);
-struct workqueue_struct *system_nrt_freezable_wq __read_mostly;
-EXPORT_SYMBOL_GPL(system_nrt_freezable_wq);
#define CREATE_TRACE_POINTS
#include <trace/events/workqueue.h>
@@ -3838,16 +3834,12 @@ static int __init init_workqueues(void)
system_wq = alloc_workqueue("events", 0, 0);
system_highpri_wq = alloc_workqueue("events_highpri", WQ_HIGHPRI, 0);
system_long_wq = alloc_workqueue("events_long", 0, 0);
- system_nrt_wq = alloc_workqueue("events_nrt", WQ_NON_REENTRANT, 0);
system_unbound_wq = alloc_workqueue("events_unbound", WQ_UNBOUND,
WQ_UNBOUND_MAX_ACTIVE);
system_freezable_wq = alloc_workqueue("events_freezable",
WQ_FREEZABLE, 0);
- system_nrt_freezable_wq = alloc_workqueue("events_nrt_freezable",
- WQ_NON_REENTRANT | WQ_FREEZABLE, 0);
BUG_ON(!system_wq || !system_highpri_wq || !system_long_wq ||
- !system_nrt_wq || !system_unbound_wq || !system_freezable_wq ||
- !system_nrt_freezable_wq);
+ !system_unbound_wq || !system_freezable_wq);
return 0;
}
early_initcall(init_workqueues);