[PATCH] switch dm

ioctl() doesn't need BKL here

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 10 insertions, 21 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 8b4c92b1b6db..dc48c2585feb 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -21,7 +21,6 @@
 #include <linux/idr.h>
 #include <linux/hdreg.h>
 #include <linux/blktrace_api.h>
-#include <linux/smp_lock.h>
 
 #define DM_MSG_PREFIX "core"
 
@@ -249,13 +248,13 @@ static void __exit dm_exit(void)
 /*
  * Block device functions
  */
-static int dm_blk_open(struct inode *inode, struct file *file)
+static int dm_blk_open(struct block_device *bdev, fmode_t mode)
 {
         struct mapped_device *md;
 
         spin_lock(&_minor_lock);
 
-        md = inode->i_bdev->bd_disk->private_data;
+        md = bdev->bd_disk->private_data;
         if (!md)
                 goto out;
 
@@ -274,11 +273,9 @@ out:
         return md ? 0 : -ENXIO;
 }
 
-static int dm_blk_close(struct inode *inode, struct file *file)
+static int dm_blk_close(struct gendisk *disk, fmode_t mode)
 {
-        struct mapped_device *md;
-
-        md = inode->i_bdev->bd_disk->private_data;
+        struct mapped_device *md = disk->private_data;
         atomic_dec(&md->open_count);
         dm_put(md);
         return 0;
@@ -315,21 +312,14 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
         return dm_get_geometry(md, geo);
 }
 
-static int dm_blk_ioctl(struct inode *inode, struct file *file,
+static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
                         unsigned int cmd, unsigned long arg)
 {
-        struct mapped_device *md;
-        struct dm_table *map;
+        struct mapped_device *md = bdev->bd_disk->private_data;
+        struct dm_table *map = dm_get_table(md);
         struct dm_target *tgt;
         int r = -ENOTTY;
 
-        /* We don't really need this lock, but we do need 'inode'. */
-        unlock_kernel();
-
-        md = inode->i_bdev->bd_disk->private_data;
-
-        map = dm_get_table(md);
-
         if (!map || !dm_table_get_size(map))
                 goto out;
 
@@ -350,7 +340,6 @@ static int dm_blk_ioctl(struct inode *inode, struct file *file,
 out:
         dm_table_put(map);
 
-        lock_kernel();
         return r;
 }
 
@@ -1698,9 +1687,9 @@ int dm_noflush_suspending(struct dm_target *ti)
 EXPORT_SYMBOL_GPL(dm_noflush_suspending);
 
 static struct block_device_operations dm_blk_dops = {
-        .__open = dm_blk_open,
-        .__release = dm_blk_close,
-        .__ioctl = dm_blk_ioctl,
+        .open = dm_blk_open,
+        .release = dm_blk_close,
+        .ioctl = dm_blk_ioctl,
         .getgeo = dm_blk_getgeo,
         .owner = THIS_MODULE
 };