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authorPhil Carmody <ext-phil.2.carmody@nokia.com>2010-10-21 02:57:33 +0400
committerThomas Gleixner <tglx@linutronix.de>2010-10-21 19:30:06 +0400
commitdd6414b50fa2b1cd247a8aa8f8bd42414b7453e1 (patch)
treed6572c35cf1997e2d18e451cb44742c89723d804 /include/linux/workqueue.h
parent2bf1c05e3c406925e498d06da66b4828f0209ea6 (diff)
downloadlinux-dd6414b50fa2b1cd247a8aa8f8bd42414b7453e1.tar.xz
timer: Permit statically-declared work with deferrable timers
Currently, you have to just define a delayed_work uninitialised, and then initialise it before first use. That's a tad clumsy. At risk of playing mind-games with the compiler, fooling it into doing pointer arithmetic with compile-time-constants, this lets clients properly initialise delayed work with deferrable timers statically. This patch was inspired by the issues which lead Artem Bityutskiy to commit 8eab945c5616fc984 ("sunrpc: make the cache cleaner workqueue deferrable"). Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com> Acked-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/workqueue.h')
-rw-r--r--include/linux/workqueue.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index f11100f96482..88238c15ec3e 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -127,12 +127,20 @@ struct execute_work {
.timer = TIMER_INITIALIZER(NULL, 0, 0), \
}
+#define __DEFERRED_WORK_INITIALIZER(n, f) { \
+ .work = __WORK_INITIALIZER((n).work, (f)), \
+ .timer = TIMER_DEFERRED_INITIALIZER(NULL, 0, 0), \
+ }
+
#define DECLARE_WORK(n, f) \
struct work_struct n = __WORK_INITIALIZER(n, f)
#define DECLARE_DELAYED_WORK(n, f) \
struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f)
+#define DECLARE_DEFERRED_WORK(n, f) \
+ struct delayed_work n = __DEFERRED_WORK_INITIALIZER(n, f)
+
/*
* initialize a work item's function pointer
*/