make iunique use a do/while loop rather than its obscure goto loop

A while back, Christoph mentioned that he thought that iunique ought to be
cleaned up to use a more conventional loop construct. This patch does that,
turning the strange goto loop into a do/while.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/inode.c b/fs/inode.c
index c03089421b6f47f8e65e18a772bae185f28b61eb..81508b0a3a70c2403986e77acef9aac1960d8762 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -685,25 +685,21 @@ ino_t iunique(struct super_block *sb, ino_t max_reserved)
 {
        static ino_t counter;
        struct inode *inode;
-       struct hlist_head * head;
+       struct hlist_head *head;
        ino_t res;
+
        spin_lock(&inode_lock);
-retry:
-       if (counter > max_reserved) {
-               head = inode_hashtable + hash(sb,counter);
+       do {
+               if (counter <= max_reserved)
+                       counter = max_reserved + 1;
                res = counter++;
+               head = inode_hashtable + hash(sb, res);
                inode = find_inode_fast(sb, head, res);
-               if (!inode) {
-                       spin_unlock(&inode_lock);
-                       return res;
-               }
-       } else {
-               counter = max_reserved + 1;
-       }
-       goto retry;
-       
-}
+       } while (inode != NULL);
+       spin_unlock(&inode_lock);
 
+       return res;
+}
 EXPORT_SYMBOL(iunique);
 
 struct inode *igrab(struct inode *inode)