linux-kernel - [PATCH] pxafb: Convert ctrlr

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Date:	Mon, 5 May 2008 22:50:42 +0200
From:	Matthias Kaehlcke <matthias@...hlcke.net>
To:	Daniel Mack <daniel@...aq.de>, Eric Miao <eric.miao@...vell.com>,
	Russell King <rmk@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Antonino Daplas <adaplas@...il.com>
Subject: [PATCH] pxafb: Convert ctrlr_sem in a mutex

pxafb: The semaphore ctrlr_sem is used as a mutex. Convert it to the
mutex API.

Signed-off-by: Matthias Kaehlcke <matthias@...hlcke.net>

--

diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 3ab6e3d..a63b77b 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -40,6 +40,7 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/completion.h>
+#include <linux/mutex.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
 
@@ -1059,7 +1060,7 @@ static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
 {
 	u_int old_state;
 
-	down(&fbi->ctrlr_sem);
+	mutex_lock(&fbi->ctrlr_lock);
 
 	old_state = fbi->state;
 
@@ -1147,7 +1148,7 @@ static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
 		}
 		break;
 	}
-	up(&fbi->ctrlr_sem);
+	mutex_unlock(&fbi->ctrlr_lock);
 }
 
 /*
@@ -1399,7 +1400,7 @@ static struct pxafb_info * __init pxafb_init_fbinfo(struct device *dev)
 
 	init_waitqueue_head(&fbi->ctrlr_wait);
 	INIT_WORK(&fbi->task, pxafb_task);
-	init_MUTEX(&fbi->ctrlr_sem);
+	mutex_init(&fbi->ctrlr_lock);
 	init_completion(&fbi->disable_done);
 #ifdef CONFIG_FB_PXA_SMARTPANEL
 	init_completion(&fbi->command_done);
diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h
index 8238dc8..31541b8 100644
--- a/drivers/video/pxafb.h
+++ b/drivers/video/pxafb.h
@@ -106,7 +106,7 @@ struct pxafb_info {
 
 	volatile u_char		state;
 	volatile u_char		task_state;
-	struct semaphore	ctrlr_sem;
+	struct mutex		ctrlr_lock;
 	wait_queue_head_t	ctrlr_wait;
 	struct work_struct	task;
 
-- 
Matthias Kaehlcke
Embedded Linux Engineer
Barcelona

     The assumption that what currently exists must necessarily
      exist is the acid that corrodes all visionary thinking
                                                                 .''`.
    using free software / Debian GNU/Linux | http://debian.org  : :'  :
                                                                `. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4                  `-
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