Index: linux-2.6-tip/drivers/mtd/mtdchar.c
===================================================================
--- linux-2.6-tip.orig/drivers/mtd/mtdchar.c
+++ linux-2.6-tip/drivers/mtd/mtdchar.c
@@ -12,7 +12,6 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
-#include <linux/smp_lock.h>
 #include <linux/backing-dev.h>
 #include <linux/compat.h>
 
@@ -74,18 +73,14 @@ static int mtd_open(struct inode *inode,
 	if ((file->f_mode & FMODE_WRITE) && (minor & 1))
 		return -EACCES;
 
-	lock_kernel();
 	mtd = get_mtd_device(NULL, devnum);
 
-	if (IS_ERR(mtd)) {
-		ret = PTR_ERR(mtd);
-		goto out;
-	}
+	if (IS_ERR(mtd))
+		return PTR_ERR(mtd);
 
 	if (mtd->type == MTD_ABSENT) {
 		put_mtd_device(mtd);
-		ret = -ENODEV;
-		goto out;
+		return -ENODEV;
 	}
 
 	if (mtd->backing_dev_info)
@@ -94,21 +89,17 @@ static int mtd_open(struct inode *inode,
 	/* You can't open it RW if it's not a writeable device */
 	if ((file->f_mode & FMODE_WRITE) && !(mtd->flags & MTD_WRITEABLE)) {
 		put_mtd_device(mtd);
-		ret = -EACCES;
-		goto out;
+		return -EACCES;
 	}
 
 	mfi = kzalloc(sizeof(*mfi), GFP_KERNEL);
 	if (!mfi) {
 		put_mtd_device(mtd);
-		ret = -ENOMEM;
-		goto out;
+		return -ENOMEM;
 	}
 	mfi->mtd = mtd;
 	file->private_data = mfi;
 
-out:
-	unlock_kernel();
 	return ret;
 } /* mtd_open */
 
@@ -450,13 +441,12 @@ static int mtd_do_readoob(struct mtd_inf
 	return ret;
 }
 
-static int mtd_ioctl(struct inode *inode, struct file *file,
-		     u_int cmd, u_long arg)
+static long mtd_ioctl(struct file *file, u_int cmd, u_long arg)
 {
 	struct mtd_file_info *mfi = file->private_data;
 	struct mtd_info *mtd = mfi->mtd;
 	void __user *argp = (void __user *)arg;
-	int ret = 0;
+	long ret = 0;
 	u_long size;
 	struct mtd_info_user info;
 
@@ -842,8 +832,6 @@ static long mtd_compat_ioctl(struct file
 	void __user *argp = compat_ptr(arg);
 	int ret = 0;
 
-	lock_kernel();
-
 	switch (cmd) {
 	case MEMWRITEOOB32:
 	{
@@ -877,8 +865,6 @@ static long mtd_compat_ioctl(struct file
 		ret = mtd_ioctl(inode, file, cmd, (unsigned long)argp);
 	}
 
-	unlock_kernel();
-
 	return ret;
 }
 
@@ -942,7 +928,7 @@ static const struct file_operations mtd_
 	.llseek		= mtd_lseek,
 	.read		= mtd_read,
 	.write		= mtd_write,
-	.ioctl		= mtd_ioctl,
+	.unlocked_ioctl	= mtd_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= mtd_compat_ioctl,
 #endif