Btrfs: Fix compile on 2.6.22 kernel

This patch fixes compile error on kernel-2.6.22
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/acl.c

@@ -22,6 +22,11 @@
 #include <linux/posix_acl_xattr.h>
 #include "ctree.h"
 #include "xattr.h"
+#ifndef is_owner_or_cap
+#define is_owner_or_cap(inode)	\
+	((current->fsuid == (inode)->i_uid) || capable(CAP_FOWNER))
+#endif
+
 static int btrfs_xattr_set_acl(struct inode *inode, int type,
 			       const void *value, size_t size)
 {

fs/btrfs/inode.c

@@ -2322,15 +2322,16 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
 		ret = -ENOMEM;
 		goto fail_unlock;
 	}
-	pending_snapshot->name = kstrndup(name, namelen, GFP_NOFS);
+	pending_snapshot->name = kmalloc(namelen + 1, GFP_NOFS);
 	if (!pending_snapshot->name) {
 		ret = -ENOMEM;
 		kfree(pending_snapshot);
 		goto fail_unlock;
 	}
+	memcpy(pending_snapshot->name, name, namelen);
+	pending_snapshot->name[namelen] = '\0';
 	trans = btrfs_start_transaction(root, 1);
 	BUG_ON(!trans);
-
 	pending_snapshot->root = root;
 	list_add(&pending_snapshot->list,
 		 &trans->transaction->pending_snapshots);