fw/btrfs/discard: Avoid uninitialized build error

popcornmix · popcornmix · commit 352fbbd169a1 · 2026-04-08T15:10:41.000+01:00
fs/btrfs/discard.c:591:60: error: ‘discard_state’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  591 |                 if (discard_state == BTRFS_DISCARD_BITMAPS ||
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
  592 |                     discard_state == BTRFS_DISCARD_FULLY_REMAPPED) {
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/fs/btrfs/discard.c b/fs/btrfs/discard.c
@@ -519,7 +519,7 @@ static void btrfs_discard_workfn(struct work_struct *work)
 {
 	struct btrfs_discard_ctl *discard_ctl;
 	struct btrfs_block_group *block_group;
-	enum btrfs_discard_state discard_state;
+	enum btrfs_discard_state discard_state = BTRFS_DISCARD_RESET_CURSOR;
 	int discard_index = 0;
 	u64 trimmed = 0;
 	u64 minlen = 0;

Original file line number	Diff line number	Diff line change
`@@ -519,7 +519,7 @@ static void btrfs_discard_workfn(struct work_struct *work)`
`519`	`519`	`{`
`520`	`520`	`struct btrfs_discard_ctl *discard_ctl;`
`521`	`521`	`struct btrfs_block_group *block_group;`
`522`		`- enum btrfs_discard_state discard_state;`
	`522`	`+ enum btrfs_discard_state discard_state = BTRFS_DISCARD_RESET_CURSOR;`
`523`	`523`	`int discard_index = 0;`
`524`	`524`	`u64 trimmed = 0;`
`525`	`525`	`u64 minlen = 0;`