linux-kernel - [patch 1/7] epoll keyed wakeups - make __wake_up

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Date:	Fri, 30 Jan 2009 19:25:14 -0800
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>, David Miller <davem@...emloft.net>
Subject: [patch 1/7] epoll keyed wakeups - make __wake_up_locked accept a key parameter

The following patch adds an extra "key" parameter to __wake_up_locked().
This allows the caller of this function (and all related macros) to
specify a key to be passed to the wakeup callbacks.



Signed-off-by: Davide Libenzi <davidel@...ilserver.org>


- Davide


---
 include/linux/wait.h |    4 ++--
 kernel/sched.c       |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

Index: linux-2.6.mod/include/linux/wait.h
===================================================================
--- linux-2.6.mod.orig/include/linux/wait.h	2009-01-30 12:11:32.000000000 -0800
+++ linux-2.6.mod/include/linux/wait.h	2009-01-30 12:11:40.000000000 -0800
@@ -133,7 +133,7 @@ static inline void __remove_wait_queue(w
 }
 
 void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
-extern void __wake_up_locked(wait_queue_head_t *q, unsigned int mode);
+extern void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, void *key);
 extern void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr);
 void __wake_up_bit(wait_queue_head_t *, void *, int);
 int __wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned);
@@ -146,7 +146,7 @@ wait_queue_head_t *bit_waitqueue(void *,
 #define wake_up(x)			__wake_up(x, TASK_NORMAL, 1, NULL)
 #define wake_up_nr(x, nr)		__wake_up(x, TASK_NORMAL, nr, NULL)
 #define wake_up_all(x)			__wake_up(x, TASK_NORMAL, 0, NULL)
-#define wake_up_locked(x)		__wake_up_locked((x), TASK_NORMAL)
+#define wake_up_locked(x)		__wake_up_locked((x), TASK_NORMAL, NULL)
 
 #define wake_up_interruptible(x)	__wake_up(x, TASK_INTERRUPTIBLE, 1, NULL)
 #define wake_up_interruptible_nr(x, nr)	__wake_up(x, TASK_INTERRUPTIBLE, nr, NULL)
Index: linux-2.6.mod/kernel/sched.c
===================================================================
--- linux-2.6.mod.orig/kernel/sched.c	2009-01-30 12:11:32.000000000 -0800
+++ linux-2.6.mod/kernel/sched.c	2009-01-30 12:11:40.000000000 -0800
@@ -4722,9 +4722,9 @@ EXPORT_SYMBOL(__wake_up);
 /*
  * Same as __wake_up but called with the spinlock in wait_queue_head_t held.
  */
-void __wake_up_locked(wait_queue_head_t *q, unsigned int mode)
+void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, void *key)
 {
-	__wake_up_common(q, mode, 1, 0, NULL);
+	__wake_up_common(q, mode, 1, 0, key);
 }
 
 /**

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