linux-kernel - [tip:bkl/drivers] drivers: Remove BKL from misc

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Date:	Wed, 14 Oct 2009 15:47:39 GMT
From:	tip-bot for Thomas Gleixner <tglx@...utronix.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	gregkh@...e.de, tglx@...utronix.de
Subject: [tip:bkl/drivers] drivers: Remove BKL from misc_open

Commit-ID:  40b798efe3460797a4ac928ee2e038774e2758eb
Gitweb:     http://git.kernel.org/tip/40b798efe3460797a4ac928ee2e038774e2758eb
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Sat, 10 Oct 2009 15:35:43 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 14 Oct 2009 17:33:32 +0200

drivers: Remove BKL from misc_open

misc_open() is already serialized with misc_mtx. Remove the BKL
locking which got there via the BKL pushdown.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Greg Kroah-Hartman <gregkh@...e.de>
LKML-Reference: <20091010153349.237173041@...utronix.de>
---
 drivers/char/misc.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 07fa612..96f1cd0 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -49,7 +49,6 @@
 #include <linux/device.h>
 #include <linux/tty.h>
 #include <linux/kmod.h>
-#include <linux/smp_lock.h>
 
 /*
  * Head entry for the doubly linked miscdevice list
@@ -118,8 +117,7 @@ static int misc_open(struct inode * inode, struct file * file)
 	struct miscdevice *c;
 	int err = -ENODEV;
 	const struct file_operations *old_fops, *new_fops = NULL;
-	
-	lock_kernel();
+
 	mutex_lock(&misc_mtx);
 	
 	list_for_each_entry(c, &misc_list, list) {
@@ -157,7 +155,6 @@ static int misc_open(struct inode * inode, struct file * file)
 	fops_put(old_fops);
 fail:
 	mutex_unlock(&misc_mtx);
-	unlock_kernel();
 	return err;
 }
 
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