Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/fs/ext4/fsmap.c b/fs/ext4/fsmap.c
index 4b99e2d..dbccf46 100644
--- a/fs/ext4/fsmap.c
+++ b/fs/ext4/fsmap.c
@@ -626,7 +626,7 @@
 {
 	struct ext4_fsmap dkeys[2];	/* per-dev keys */
 	struct ext4_getfsmap_dev handlers[EXT4_GETFSMAP_DEVS];
-	struct ext4_getfsmap_info info = {0};
+	struct ext4_getfsmap_info info = { NULL };
 	int i;
 	int error = 0;