[PATCH] fs/dcache.c: revamped to use a more straightforward and efficient way to operate

[Denis Cheng]

Signed-off-by: Denis Cheng <[EMAIL PROTECTED]>
---
 fs/dcache.c |   39 ++++++++++++++++++---------------------
 1 files changed, 18 insertions(+), 21 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 678d39d..05ed44a 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1138,29 +1138,26 @@ struct dentry * d_alloc_anon(struct inode *inode)
        
        spin_lock(&dcache_lock);
        res = __d_find_alias(inode, 0);
-       if (!res) {
-               /* attach a disconnected dentry */
-               res = tmp;
-               tmp = NULL;
-               spin_lock(&res->d_lock);
-               res->d_sb = inode->i_sb;
-               res->d_parent = res;
-               res->d_inode = inode;
-               res->d_flags |= DCACHE_DISCONNECTED;
-               res->d_flags &= ~DCACHE_UNHASHED;
-               list_add(&res->d_alias, &inode->i_dentry);
-               hlist_add_head(&res->d_hash, &inode->i_sb->s_anon);
-               spin_unlock(&res->d_lock);
-
-               inode = NULL; /* don't drop reference */
-       }
-       spin_unlock(&dcache_lock);
-
-       if (inode)
+       if (unlikely(res)) {
+               spin_unlock(&dcache_lock);
                iput(inode);
-       if (tmp)
                dput(tmp);
-       return res;
+               return res;
+       } else {
+               /* attach a disconnected dentry */
+               spin_lock(&tmp->d_lock);
+               tmp->d_sb = inode->i_sb;
+               tmp->d_parent = tmp;
+               tmp->d_inode = inode;
+               tmp->d_flags |= DCACHE_DISCONNECTED;
+               tmp->d_flags &= ~DCACHE_UNHASHED;
+               list_add(&tmp->d_alias, &inode->i_dentry);
+               hlist_add_head(&tmp->d_hash, &inode->i_sb->s_anon);
+               spin_unlock(&tmp->d_lock);
+
+               spin_unlock(&dcache_lock);
+               return tmp;
+       }
 }
 
 
-- 
1.5.3.2

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