Convert ext4 to use unlocked_ioctl

I checked ext4_ioctl and it looked largely safe to not be used
without BKL.  So convert it over to unlocked_ioctl.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

1 files changed, 3 insertions, 9 deletions

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 25b13ede8086..ce937fe432a0 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -18,9 +18,9 @@
 #include <linux/mount.h>
 #include <asm/uaccess.h>
 
-int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
-                unsigned long arg)
+long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
+        struct inode *inode = filp->f_dentry->d_inode;
         struct ext4_inode_info *ei = EXT4_I(inode);
         unsigned int flags;
         unsigned short rsv_window_size;
@@ -277,9 +277,6 @@ setversion_out:
 #ifdef CONFIG_COMPAT
 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-        struct inode *inode = file->f_path.dentry->d_inode;
-        int ret;
-
         /* These are just misnamed, they actually get/put from/to user an int */
         switch (cmd) {
         case EXT4_IOC32_GETFLAGS:
@@ -319,9 +316,6 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
         default:
                 return -ENOIOCTLCMD;
         }
-        lock_kernel();
-        ret = ext4_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
-        unlock_kernel();
-        return ret;
+        return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
 }
 #endif