qstr: constify instances in adfs

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index fd4cf2c..62ee2cb 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -101,7 +101,7 @@
 }
 
 static int
-adfs_match(struct qstr *name, struct object_info *obj)
+adfs_match(const struct qstr *name, struct object_info *obj)
 {
 	int i;
 
@@ -126,7 +126,7 @@
 }
 
 static int
-adfs_dir_lookup_byname(struct inode *inode, struct qstr *name, struct object_info *obj)
+adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct object_info *obj)
 {
 	struct super_block *sb = inode->i_sb;
 	const struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;