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authorJames Bottomley <James.Bottomley@steeleye.com>2006-02-23 21:43:43 +0300
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-02-28 08:34:40 +0300
commit1fa44ecad2b86475e038aed81b0bf333fa484f8b (patch)
tree62e9e9aac0aaf64e6f8e69809d8ab513e22346a1 /include/linux/workqueue.h
parentba3af0aff042caa1f41b5f7164cab37c717b8811 (diff)
downloadlinux-1fa44ecad2b86475e038aed81b0bf333fa484f8b.tar.xz
[SCSI] add execute_in_process_context() API
We have several points in the SCSI stack (primarily for our device functions) where we need to guarantee process context, but (given the place where the last reference was released) we cannot guarantee this. This API gets around the issue by executing the function directly if the caller has process context, but scheduling a workqueue to execute in process context if the caller doesn't have it. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/linux/workqueue.h')
-rw-r--r--include/linux/workqueue.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 86b111300231..957c21c16d62 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -20,6 +20,10 @@ struct work_struct {
struct timer_list timer;
};
+struct execute_work {
+ struct work_struct work;
+};
+
#define __WORK_INITIALIZER(n, f, d) { \
.entry = { &(n).entry, &(n).entry }, \
.func = (f), \
@@ -74,6 +78,8 @@ extern void init_workqueues(void);
void cancel_rearming_delayed_work(struct work_struct *work);
void cancel_rearming_delayed_workqueue(struct workqueue_struct *,
struct work_struct *);
+int execute_in_process_context(void (*fn)(void *), void *,
+ struct execute_work *);
/*
* Kill off a pending schedule_delayed_work(). Note that the work callback