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block: use bd{grab,put}() instead of open-coding 

- bd_acquire() and bd_forget() open-code bdgrab() and bdput()
- raw driver uses igrab() but never checks its return value and always
  holds another ref from bind_set() while calling it, so it's
  equivalent to bdgrab()

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Ilya Dryomov 2015-11-20 22:18:43 +01:00 committed by Jens Axboe
parent e36f620428
commit ed8a9d2c81
2 changed files with 4 additions and 4 deletions
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2
drivers/char/raw.c
View File

@ -71,7 +71,7 @@ static int raw_open(struct inode *inode, struct file *filp)
err = -ENODEV;
if (!bdev)
goto out;
igrab(bdev->bd_inode);
bdgrab(bdev);
err = blkdev_get(bdev, filp->f_mode | FMODE_EXCL, raw_open);
if (err)
goto out;

6
fs/block_dev.c
View File

@ -696,7 +696,7 @@ static struct block_device *bd_acquire(struct inode *inode)
spin_lock(&bdev_lock);
bdev = inode->i_bdev;
if (bdev) {
ihold(bdev->bd_inode);
bdgrab(bdev);
spin_unlock(&bdev_lock);
return bdev;
}
@ -712,7 +712,7 @@ static struct block_device *bd_acquire(struct inode *inode)
* So, we can access it via ->i_mapping always
* without igrab().
*/
ihold(bdev->bd_inode);
bdgrab(bdev);
inode->i_bdev = bdev;
inode->i_mapping = bdev->bd_inode->i_mapping;
list_add(&inode->i_devices, &bdev->bd_inodes);
@ -735,7 +735,7 @@ void bd_forget(struct inode *inode)
spin_unlock(&bdev_lock);
if (bdev)
iput(bdev->bd_inode);
bdput(bdev);
}
/**