linux-kernel - [PATCH 07/12] BKL: Remove BKL from USB gadgetfs

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Message-Id: <1284659185-8942-8-git-send-email-arnd@arndb.de>
Date:	Thu, 16 Sep 2010 19:46:20 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-kernel@...r.kernel.org
Cc:	Arnd Bergmann <arnd@...db.de>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	linux-usb@...r.kernel.org
Subject: [PATCH 07/12] BKL: Remove BKL from USB gadgetfs

The BKL is only used in fill_super, which is  protected by the superblocks
s_umount rw_semaphore. Therefore it is safe to remove the BKL entirely.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: David Brownell <dbrownell@...rs.sourceforge.net>
Cc: linux-usb@...r.kernel.org
---
 drivers/usb/gadget/inode.c |   13 ++-----------
 1 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 82a88d3..3f1d771 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -33,7 +33,6 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/poll.h>
-#include <linux/smp_lock.h>
 
 #include <linux/device.h>
 #include <linux/moduleparam.h>
@@ -2043,19 +2042,13 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
 	struct dentry	*d;
 	struct dev_data	*dev;
 
-	lock_kernel();
-
-	if (the_device) {
-		unlock_kernel();
+	if (the_device)
 		return -ESRCH;
-	}
 
 	/* fake probe to determine $CHIP */
 	(void) usb_gadget_register_driver (&probe_driver);
-	if (!CHIP) {
-		unlock_kernel();
+	if (!CHIP)
 		return -ENODEV;
-	}
 
 	/* superblock */
 	sb->s_blocksize = PAGE_CACHE_SIZE;
@@ -2092,7 +2085,6 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
 	 * from binding to a controller.
 	 */
 	the_device = dev;
-	unlock_kernel();
 	return 0;
 
 enomem3:
@@ -2102,7 +2094,6 @@ enomem2:
 enomem1:
 	iput (inode);
 enomem0:
-	unlock_kernel();
 	return -ENOMEM;
 }
 
-- 
1.7.1

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