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authorAl Viro <viro@zeniv.linux.org.uk>2010-10-23 11:11:40 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2010-10-25 21:26:11 -0400
commit7de9c6ee3ecffd99e1628e81a5ea5468f7581a1f (patch)
tree88787e77ba8a253d0a26aeda4bd5e58532d592e0 /fs/block_dev.c
parent646ec4615cd05972581c9c5342ed7a1e77df17bb (diff)
downloadlwn-7de9c6ee3ecffd99e1628e81a5ea5468f7581a1f.tar.gz
lwn-7de9c6ee3ecffd99e1628e81a5ea5468f7581a1f.zip
new helper: ihold()
Clones an existing reference to inode; caller must already hold one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index b737451e2e9d..81972eb34b39 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -550,7 +550,7 @@ EXPORT_SYMBOL(bdget);
*/
struct block_device *bdgrab(struct block_device *bdev)
{
- atomic_inc(&bdev->bd_inode->i_count);
+ ihold(bdev->bd_inode);
return bdev;
}
@@ -580,7 +580,7 @@ static struct block_device *bd_acquire(struct inode *inode)
spin_lock(&bdev_lock);
bdev = inode->i_bdev;
if (bdev) {
- atomic_inc(&bdev->bd_inode->i_count);
+ ihold(bdev->bd_inode);
spin_unlock(&bdev_lock);
return bdev;
}
@@ -591,12 +591,12 @@ static struct block_device *bd_acquire(struct inode *inode)
spin_lock(&bdev_lock);
if (!inode->i_bdev) {
/*
- * We take an additional bd_inode->i_count for inode,
+ * We take an additional reference to bd_inode,
* and it's released in clear_inode() of inode.
* So, we can access it via ->i_mapping always
* without igrab().
*/
- atomic_inc(&bdev->bd_inode->i_count);
+ ihold(bdev->bd_inode);
inode->i_bdev = bdev;
inode->i_mapping = bdev->bd_inode->i_mapping;
list_add(&inode->i_devices, &bdev->bd_inodes);