linux-kernel - [RFC][PATCH 2/8] mem_notify v5: introduce wake_up_locked

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Message-Id: <20080124131927.1766.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Thu, 24 Jan 2008 13:20:12 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:	kosaki.motohiro@...fujitsu.com,
	Marcelo Tosatti <marcelo@...ck.org>,
	Daniel Spang <daniel.spang@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [RFC][PATCH 2/8] mem_notify v5: introduce wake_up_locked_nr() new API


introduce new API wake_up_locked_nr() and wake_up_locked_all().
it it similar as wake_up_nr() and wake_up_all(), but it doesn't lock.

Signed-off-by: Marcelo Tosatti <marcelo@...ck.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

---
 include/linux/wait.h |    7 +++++--
 kernel/sched.c       |    5 +++--
 2 files changed, 8 insertions(+), 4 deletions(-)

Index: linux-2.6.24-rc6-mm1-memnotify/include/linux/wait.h
===================================================================
--- linux-2.6.24-rc6-mm1-memnotify.orig/include/linux/wait.h	2008-01-17 18:28:33.000000000 +0900
+++ linux-2.6.24-rc6-mm1-memnotify/include/linux/wait.h	2008-01-17 18:56:16.000000000 +0900
@@ -142,7 +142,7 @@ static inline void __remove_wait_queue(w
 }
 
 void FASTCALL(__wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key));
-extern void FASTCALL(__wake_up_locked(wait_queue_head_t *q, unsigned int mode));
+void FASTCALL(__wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr, void *key));
 extern void FASTCALL(__wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr));
 void FASTCALL(__wake_up_bit(wait_queue_head_t *, void *, int));
 int FASTCALL(__wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned));
@@ -155,7 +155,10 @@ wait_queue_head_t *FASTCALL(bit_waitqueu
 #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, 1, NULL)
+#define wake_up_locked_nr(x, nr)	__wake_up_locked((x), TASK_NORMAL, nr, NULL)
+#define wake_up_locked_all(x)		__wake_up_locked((x), TASK_NORMAL, 0, 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-2.6.24-rc6-mm1-memnotify/kernel/sched.c
===================================================================
--- linux-2.6.24-rc6-mm1-memnotify.orig/kernel/sched.c	2008-01-17 18:31:12.000000000 +0900
+++ linux-2.6.24-rc6-mm1-memnotify/kernel/sched.c	2008-01-17 18:56:16.000000000 +0900
@@ -3837,9 +3837,10 @@ 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,
+		      int nr_exclusive, void *key)
 {
-	__wake_up_common(q, mode, 1, 0, NULL);
+	__wake_up_common(q, mode, nr_exclusive, 0, key);
 }
 
 /**


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