On 10.07.2018 09:33, Gu Jinxiang wrote:
> Since output parameter fs_devices of btrfs_parse_early_options is
> not used in the caller, make it be a local variable.
The changelog is a bit misleading, because 'fs_devices' is in fact used
in the caller, however it's always passed to btrfs_scan_one_device which
overrides it. Finally it is assigned to fs_info->fs_devices. So the
patch is correct however put more detail in the changelog explaining
it's overriden by btrfs_scan_one_device.
>
> Signed-off-by: Gu Jinxiang <g...@cn.fujitsu.com>
> ---
> fs/btrfs/super.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index bf546d6c286c..4ee082e96d51 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -886,11 +886,12 @@ int btrfs_parse_options(struct btrfs_fs_info *info,
> char *options,
> * only when we need to allocate a new super block.
> */
> static int btrfs_parse_early_options(const char *options, fmode_t flags,
> - void *holder, struct btrfs_fs_devices **fs_devices)
> + void *holder)
> {
> substring_t args[MAX_OPT_ARGS];
> char *device_name, *opts, *orig, *p;
> int error = 0;
> + struct btrfs_fs_devices *fs_devices = NULL;
>
> if (!options)
> return 0;
> @@ -918,7 +919,7 @@ static int btrfs_parse_early_options(const char *options,
> fmode_t flags,
> goto out;
> }
> error = btrfs_scan_one_device(device_name,
> - flags, holder, fs_devices);
> + flags, holder, &fs_devices);
> kfree(device_name);
> if (error)
> goto out;
> @@ -1526,8 +1527,7 @@ static struct dentry *btrfs_mount_root(struct
> file_system_type *fs_type,
> if (!(flags & SB_RDONLY))
> mode |= FMODE_WRITE;
>
> - error = btrfs_parse_early_options(data, mode, fs_type,
> - &fs_devices);
> + error = btrfs_parse_early_options(data, mode, fs_type);
> if (error) {
> return ERR_PTR(error);
> }
>
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