From 7cc4bcc6f152d365eb27acba5dcb7b38b36b3e50 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 27 Apr 2010 16:24:20 +0200
Subject: hfsplus: Push down BKL into ioctl function

HFS is one of the remaining users of the ->ioctl function, convert it
blindly to unlocked_ioctl by pushing down the BKL.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
---
 fs/hfsplus/ioctl.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'fs/hfsplus/ioctl.c')

diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c
index f457d2c..ac405f0 100644
--- a/fs/hfsplus/ioctl.c
+++ b/fs/hfsplus/ioctl.c
@@ -17,14 +17,16 @@
 #include <linux/mount.h>
 #include <linux/sched.h>
 #include <linux/xattr.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include "hfsplus_fs.h"
 
-int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
-		  unsigned long arg)
+long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
+	struct inode *inode = filp->f_path.dentry->d_inode;
 	unsigned int flags;
 
+	lock_kernel();
 	switch (cmd) {
 	case HFSPLUS_IOC_EXT2_GETFLAGS:
 		flags = 0;
@@ -38,8 +40,10 @@ int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	case HFSPLUS_IOC_EXT2_SETFLAGS: {
 		int err = 0;
 		err = mnt_want_write(filp->f_path.mnt);
-		if (err)
+		if (err) {
+			unlock_kernel();
 			return err;
+		}
 
 		if (!is_owner_or_cap(inode)) {
 			err = -EACCES;
@@ -85,9 +89,11 @@ int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 		mark_inode_dirty(inode);
 setflags_out:
 		mnt_drop_write(filp->f_path.mnt);
+		unlock_kernel();
 		return err;
 	}
 	default:
+		unlock_kernel();
 		return -ENOTTY;
 	}
 }
-- 
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