linux-kernel - [PATCH v3 091/110] link_path_walk: use explicit returns for failure exits

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Message-Id: <1431367690-5223-91-git-send-email-viro@ZenIV.linux.org.uk>
Date:	Mon, 11 May 2015 19:07:51 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Neil Brown <neilb@...e.de>, Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH v3 091/110] link_path_walk: use explicit returns for failure exits

From: Al Viro <viro@...iv.linux.org.uk>

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 fs/namei.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 27c3859..756e150 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1772,7 +1772,7 @@ static int link_path_walk(const char *name, struct nameidata *nd)
 
 		err = may_lookup(nd);
  		if (err)
-			break;
+			return err;
 
 		hash_len = hash_name(name);
 
@@ -1794,7 +1794,7 @@ static int link_path_walk(const char *name, struct nameidata *nd)
 				struct qstr this = { { .hash_len = hash_len }, .name = name };
 				err = parent->d_op->d_hash(parent, &this);
 				if (err < 0)
-					break;
+					return err;
 				hash_len = this.hash_len;
 				name = this.name;
 			}
@@ -1829,15 +1829,13 @@ OK:
 			err = walk_component(nd, WALK_GET);
 		}
 		if (err < 0)
-			break;
+			return err;
 
 		if (err) {
 			const char *s = get_link(nd);
 
-			if (unlikely(IS_ERR(s))) {
-				err = PTR_ERR(s);
-				break;
-			}
+			if (unlikely(IS_ERR(s)))
+				return PTR_ERR(s);
 			err = 0;
 			if (unlikely(!s)) {
 				/* jumped */
@@ -1848,12 +1846,9 @@ OK:
 				continue;
 			}
 		}
-		if (!d_can_lookup(nd->path.dentry)) {
-			err = -ENOTDIR;
-			break;
-		}
+		if (unlikely(!d_can_lookup(nd->path.dentry)))
+			return -ENOTDIR;
 	}
-	return err;
 }
 
 static const char *path_init(int dfd, const struct filename *name,
-- 
2.1.4

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