[PATCH] Btrfs: fix compile error about uninitialized variable

[ye.xingchen]

From: Minghao Chi <chi.minghao@xxxxxxxxxx>

fs/btrfs/tree-log.c:6166:6: note: 'last_range_start' was declared here
fs/btrfs/volumes.c:2598:27: note: 'seed_devices' was declared here
fs/btrfs/send.c:1909:13: error: 'right_gen' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Signed-off-by: Minghao Chi <chi.minghao@xxxxxxxxxx>
Signed-off-by: ye xingchen <ye.xingchen@xxxxxxxxxx>
---
 fs/btrfs/send.c     | 2 +-
 fs/btrfs/tree-log.c | 2 +-
 fs/btrfs/volumes.c  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index c3146ce84156..3c9f2d30065d 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1875,7 +1875,7 @@ static int get_cur_inode_state(struct send_ctx *sctx, u64 ino, u64 gen,
 	int left_ret;
 	int right_ret;
 	u64 left_gen;
-	u64 right_gen;
+	u64 right_gen = 0;
 	struct btrfs_inode_info info;

 	ret = get_inode_info(sctx->send_root, ino, &info);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 200cea6e49e5..b91fa398b814 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -6163,7 +6163,7 @@ static int log_delayed_deletions_incremental(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_root *log = inode->root->log_root;
 	const struct btrfs_delayed_item *curr;
-	u64 last_range_start;
+	u64 last_range_start = 0;
 	u64 last_range_end = 0;
 	struct btrfs_key key;

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 83cb2db43779..1298569cf8b5 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2595,7 +2595,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	struct block_device *bdev;
 	struct super_block *sb = fs_info->sb;
 	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
-	struct btrfs_fs_devices *seed_devices;
+	struct btrfs_fs_devices *seed_devices = NULL;
 	u64 orig_super_total_bytes;
 	u64 orig_super_num_devices;
 	int ret = 0;
-- 
2.25.1