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authorNick Piggin <npiggin@kernel.dk>2011-01-07 07:49:33 +0100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 07:50:21 +0100
commitda5029563a0a026c64821b09e8e7b4fd81d3fe1b (patch)
tree5d5618e0cb382390073377b1be7d0aa76879ac54 /fs/ocfs2/dcache.c
parentfs: dcache scale dentry refcount (diff)
downloadlinux-da5029563a0a026c64821b09e8e7b4fd81d3fe1b.tar.xz
linux-da5029563a0a026c64821b09e8e7b4fd81d3fe1b.zip
fs: dcache scale d_unhashed
Protect d_unhashed(dentry) condition with d_lock. This means keeping DCACHE_UNHASHED bit in synch with hash manipulations. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/ocfs2/dcache.c')
-rw-r--r--fs/ocfs2/dcache.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 895532ac4d98..35e5f5a9ef59 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -174,13 +174,16 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
list_for_each(p, &inode->i_dentry) {
dentry = list_entry(p, struct dentry, d_alias);
+ spin_lock(&dentry->d_lock);
if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
mlog(0, "dentry found: %.*s\n",
dentry->d_name.len, dentry->d_name.name);
- dget_locked(dentry);
+ dget_locked_dlock(dentry);
+ spin_unlock(&dentry->d_lock);
break;
}
+ spin_unlock(&dentry->d_lock);
dentry = NULL;
}