btrfs: fix uninitialized variable warning in get_inode_gen

Anybody that calls get_inode_gen() can have an uninitialized gen if
there's an error.  This isn't a big deal because all the users just exit
if they get an error, however it makes -Wmaybe-uninitialized complain,
so fix this up to always initialize the passed in gen, this quiets all
of the uninitialized warnings in send.c.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index d50182b..7817bf8 100644 (file)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -956,14 +956,12 @@ out:
 static int get_inode_gen(struct btrfs_root *root, u64 ino, u64 *gen)
 {
        int ret;
-       struct btrfs_inode_info info;
+       struct btrfs_inode_info info = { 0 };
 
-       if (!gen)
-               return -EPERM;
+       ASSERT(gen);
 
        ret = get_inode_info(root, ino, &info);
-       if (!ret)
-               *gen = info.gen;
+       *gen = info.gen;
        return ret;
 }