From 8ba7d5f5ba931be68a94b8c91bcced1622934e7a Mon Sep 17 00:00:00 2001
From: Genjian Zhang <zhanggenjian@kylinos.cn>
Date: Fri, 24 Mar 2023 10:08:38 +0800
Subject: btrfs: fix uninitialized variable warnings
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There are some warnings on older compilers (gcc 10, 7) or non-x86_64
architectures (aarch64).  As btrfs wants to enable -Wmaybe-uninitialized
by default, fix the warnings even though it's not necessary on recent
compilers (gcc 12+).

../fs/btrfs/volumes.c: In function ‘btrfs_init_new_device’:
../fs/btrfs/volumes.c:2703:3: error: ‘seed_devices’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2703 |   btrfs_setup_sprout(fs_info, seed_devices);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

../fs/btrfs/send.c: In function ‘get_cur_inode_state’:
../include/linux/compiler.h:70:32: error: ‘right_gen’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
   70 |   (__if_trace.miss_hit[1]++,1) :  \
      |                                ^
../fs/btrfs/send.c:1878:6: note: ‘right_gen’ was declared here
 1878 |  u64 right_gen;
      |      ^~~~~~~~~

Reported-by: k2ci <kernel-bot@kylinos.cn>
Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/send.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'fs/btrfs/send.c')

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index e5c963bb873d..af2e153543a5 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);
-- 
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