BKL-removal: convert ext2 over to use unlocked_ioctl

I checked ext2_ioctl and could not find anything in there that would need the
BKL.  So convert it over to use unlocked_ioctl

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ext2/dir.c

@@ -703,7 +703,7 @@ const struct file_operations ext2_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.readdir	= ext2_readdir,
-	.ioctl		= ext2_ioctl,
+	.unlocked_ioctl = ext2_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= ext2_compat_ioctl,
 #endif

fs/ext2/ext2.h

@@ -139,8 +139,7 @@ int __ext2_write_begin(struct file *file, struct address_space *mapping,
 		struct page **pagep, void **fsdata);
 
 /* ioctl.c */
-extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
+extern long ext2_ioctl(struct file *, unsigned int, unsigned long);
-		       unsigned long);
 extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long);
 
 /* namei.c */

fs/ext2/file.c

@@ -48,7 +48,7 @@ const struct file_operations ext2_file_operations = {
 	.write		= do_sync_write,
 	.aio_read	= generic_file_aio_read,
 	.aio_write	= generic_file_aio_write,
-	.ioctl		= ext2_ioctl,
+	.unlocked_ioctl = ext2_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= ext2_compat_ioctl,
 #endif
@@ -65,7 +65,7 @@ const struct file_operations ext2_xip_file_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= xip_file_read,
 	.write		= xip_file_write,
-	.ioctl		= ext2_ioctl,
+	.unlocked_ioctl = ext2_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= ext2_compat_ioctl,
 #endif

fs/ext2/ioctl.c

@@ -17,9 +17,9 @@
 #include <asm/uaccess.h>
 
 
-int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
+long ext2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-		unsigned long arg)
 {
+	struct inode *inode = filp->f_dentry->d_inode;
 	struct ext2_inode_info *ei = EXT2_I(inode);
 	unsigned int flags;
 	unsigned short rsv_window_size;
@@ -141,9 +141,6 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 #ifdef CONFIG_COMPAT
 long ext2_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 EXT2_IOC32_GETFLAGS:
@@ -161,9 +158,6 @@ long ext2_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	default:
 		return -ENOIOCTLCMD;
 	}
-	lock_kernel();
+	return ext2_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
-	ret = ext2_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
-	unlock_kernel();
-	return ret;
 }
 #endif