btrfs-progs: mkfs: use const char for label

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/mkfs/common.h b/mkfs/common.h
index 00f219a..666a75b 100644 (file)
--- a/mkfs/common.h
+++ b/mkfs/common.h
@@ -30,7 +30,7 @@
 
 struct btrfs_mkfs_config {
        /* Label of the new filesystem */
-       char *label;
+       const char *label;
        /* Blck sizes */
        u32 nodesize;
        u32 sectorsize;