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authorTejun Heo <tj@kernel.org>2010-06-29 10:07:13 +0200
committerTejun Heo <tj@kernel.org>2010-06-29 10:07:13 +0200
commit18aa9effad4adb2c1efe123af4eb24fec9f59b30 (patch)
tree76975b37ae0ef1ebf460aaab68359ed7a12fe37a /include/linux/workqueue.h
parent7a22ad757ec75186ad43a5b4670fa7423ee8f480 (diff)
workqueue: implement WQ_NON_REENTRANT
With gcwq managing all the workers and work->data pointing to the last gcwq it was on, non-reentrance can be easily implemented by checking whether the work is still running on the previous gcwq on queueing. Implement it. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/workqueue.h')
-rw-r--r--include/linux/workqueue.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 0a7814131e66..07cf5e5f91cb 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -225,6 +225,7 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
enum {
WQ_FREEZEABLE = 1 << 0, /* freeze during suspend */
WQ_SINGLE_CPU = 1 << 1, /* only single cpu at a time */
+ WQ_NON_REENTRANT = 1 << 2, /* guarantee non-reentrance */
};
extern struct workqueue_struct *