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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-29 19:14:03 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-29 19:14:03 -0400 |
| commit | ea7d4c046ba6e2c6135c98721f4f09efd1adaabc (patch) | |
| tree | 9b73f35e92a566f6005e241e3e99fb13392c1f17 /fs/binfmt_misc.c | |
| parent | 84c60b1388249a0167d5fe8160f84e66a1221ba8 (diff) | |
| download | lwn-ea7d4c046ba6e2c6135c98721f4f09efd1adaabc.tar.gz lwn-ea7d4c046ba6e2c6135c98721f4f09efd1adaabc.zip | |
binfmt_misc: ->s_root is not going anywhere
... no need to dget/dput it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/binfmt_misc.c')
| -rw-r--r-- | fs/binfmt_misc.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 3a3ced779fc7..5417516f6e59 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -637,13 +637,12 @@ static ssize_t bm_entry_write(struct file *file, const char __user *buffer, break; case 3: /* Delete this handler. */ - root = dget(file->f_path.dentry->d_sb->s_root); + root = file_inode(file)->i_sb->s_root; inode_lock(d_inode(root)); kill_node(e); inode_unlock(d_inode(root)); - dput(root); break; default: return res; @@ -665,8 +664,8 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer, { Node *e; struct inode *inode; - struct dentry *root, *dentry; - struct super_block *sb = file->f_path.dentry->d_sb; + struct super_block *sb = file_inode(file)->i_sb; + struct dentry *root = sb->s_root, *dentry; int err = 0; e = create_entry(buffer, count); @@ -674,7 +673,6 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer, if (IS_ERR(e)) return PTR_ERR(e); - root = dget(sb->s_root); inode_lock(d_inode(root)); dentry = lookup_one_len(e->name, root, strlen(e->name)); err = PTR_ERR(dentry); @@ -712,7 +710,6 @@ out2: dput(dentry); out: inode_unlock(d_inode(root)); - dput(root); if (err) { kfree(e); @@ -753,14 +750,13 @@ static ssize_t bm_status_write(struct file *file, const char __user *buffer, break; case 3: /* Delete all handlers. */ - root = dget(file->f_path.dentry->d_sb->s_root); + root = file_inode(file)->i_sb->s_root; inode_lock(d_inode(root)); while (!list_empty(&entries)) kill_node(list_entry(entries.next, Node, list)); inode_unlock(d_inode(root)); - dput(root); break; default: return res; |