diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2016-03-09 18:05:42 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-03-14 00:17:32 -0400 |
| commit | de689f5e366373682e95059e9b89d981187e4544 (patch) | |
| tree | b9116bb43a5699087b7e3c06602881a90c94a9a1 /fs/dcache.c | |
| parent | untangle fsnotify_d_instantiate() a bit (diff) | |
| download | wireguard-linux-de689f5e366373682e95059e9b89d981187e4544.tar.xz wireguard-linux-de689f5e366373682e95059e9b89d981187e4544.zip | |
don't bother with __d_instantiate(dentry, NULL)
it's a no-op - bumping ->d_seq is pointless there.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 244fd2487fe9..57da4127ea04 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1745,13 +1745,11 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode) unsigned add_flags = d_flags_for_inode(inode); spin_lock(&dentry->d_lock); - if (inode) - hlist_add_head(&dentry->d_u.d_alias, &inode->i_dentry); + hlist_add_head(&dentry->d_u.d_alias, &inode->i_dentry); raw_write_seqcount_begin(&dentry->d_seq); __d_set_inode_and_type(dentry, inode, add_flags); raw_write_seqcount_end(&dentry->d_seq); - if (inode) - __fsnotify_d_instantiate(dentry); + __fsnotify_d_instantiate(dentry); spin_unlock(&dentry->d_lock); } @@ -1773,11 +1771,11 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode) void d_instantiate(struct dentry *entry, struct inode * inode) { BUG_ON(!hlist_unhashed(&entry->d_u.d_alias)); - if (inode) + if (inode) { spin_lock(&inode->i_lock); - __d_instantiate(entry, inode); - if (inode) + __d_instantiate(entry, inode); spin_unlock(&inode->i_lock); + } security_d_instantiate(entry, inode); } EXPORT_SYMBOL(d_instantiate); @@ -2764,10 +2762,9 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry) BUG_ON(!d_unhashed(dentry)); - if (!inode) { - __d_instantiate(dentry, NULL); + if (!inode) goto out; - } + spin_lock(&inode->i_lock); if (S_ISDIR(inode->i_mode)) { struct dentry *new = __d_find_any_alias(inode); |