From: Andi Kleen <ak@linux.intel.com>
Date: Tue, 1 Jun 2010 21:04:40 +0000 (+0200)
Subject: USB-BKL: Remove lock_kernel in usbfs update_sb()
X-Git-Tag: upstream/snapshot3+hdmi~13509^2~119
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6e12ea4658487ba9c746e95b31014cb89f63703b;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

USB-BKL: Remove lock_kernel in usbfs update_sb()

The code this is attempting to lock against does not use the BKL,
so it's not needed.

Most likely this code is still broken/racy (Al Viro also thinks so),
but removing the BKL should not make it worse than before.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 1a27618..095fa53 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -265,13 +265,9 @@ static int remount(struct super_block *sb, int *flags, char *data)
 		return -EINVAL;
 	}
 
-	lock_kernel();
-
 	if (usbfs_mount && usbfs_mount->mnt_sb)
 		update_sb(usbfs_mount->mnt_sb);
 
-	unlock_kernel();
-
 	return 0;
 }