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| author | David Howells <dhowells@redhat.com> | 2015-03-17 17:33:52 +0000 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-15 15:05:29 -0400 |
| commit | 698934df8b45da2a06816ee2d7f9a9034e671e62 (patch) | |
| tree | 054b19e810747a2ced5cce3f417dc6e74f816a7b | |
| parent | 88e7fbd4a599375a08876e80a76d92e49fdea55c (diff) | |
| download | talos-op-linux-698934df8b45da2a06816ee2d7f9a9034e671e62.tar.gz talos-op-linux-698934df8b45da2a06816ee2d7f9a9034e671e62.zip | |
VFS: Combine inode checks with d_is_negative() and d_is_positive() in pathwalk
Where we have:
if (!dentry->d_inode || d_is_negative(dentry)) {
type constructions in pathwalk we should be able to eliminate the check of
d_inode and rely solely on the result of d_is_negative() or d_is_positive().
What we do have to take care to do is to read d_inode after calling a
d_is_xxx() typecheck function to get the barriering right.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/namei.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/namei.c b/fs/namei.c index 76fb76a0818b..5a9291c31881 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1585,7 +1585,7 @@ static inline int walk_component(struct nameidata *nd, struct path *path, inode = path->dentry->d_inode; } err = -ENOENT; - if (!inode || d_is_negative(path->dentry)) + if (d_is_negative(path->dentry)) goto out_path_put; if (should_follow_link(path->dentry, follow)) { @@ -2310,7 +2310,7 @@ mountpoint_last(struct nameidata *nd, struct path *path) mutex_unlock(&dir->d_inode->i_mutex); done: - if (!dentry->d_inode || d_is_negative(dentry)) { + if (d_is_negative(dentry)) { error = -ENOENT; dput(dentry); goto out; @@ -3038,7 +3038,7 @@ retry_lookup: finish_lookup: /* we _can_ be in RCU mode here */ error = -ENOENT; - if (!inode || d_is_negative(path->dentry)) { + if (d_is_negative(path->dentry)) { path_to_nameidata(path, nd); goto out; } |
