iget: stop the SYSV filesystem from using iget() and read_inode()

Stop the SYSV filesystem from using iget() and read_inode().  Replace
sysv_read_inode() with sysv_iget(), and call that instead of iget().
sysv_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: 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/sysv/namei.c b/fs/sysv/namei.c
index 6bd850b..a1f1ef3 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -53,9 +53,9 @@
 	ino = sysv_inode_by_name(dentry);
 
 	if (ino) {
-		inode = iget(dir->i_sb, ino);
-		if (!inode)
-			return ERR_PTR(-EACCES);
+		inode = sysv_iget(dir->i_sb, ino);
+		if (IS_ERR(inode))
+			return ERR_CAST(inode);
 	}
 	d_add(dentry, inode);
 	return NULL;