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List: linux-btrfs
Subject: Re: [PATCH -next] btrfs: remove unused variable
From: David Sterba <dsterba () suse ! cz>
Date: 2020-11-27 19:49:55
Message-ID: 20201127194954.GF6430 () twin ! jikos ! cz
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On Tue, Nov 17, 2020 at 05:47:43PM +0800, Zou Wei wrote:
> Fix variable set but not used compilation warnings:
>
> fs/btrfs/ctree.c:1581:6: warning: variable ‘parent_level' set but not used \
> [-Wunused-but-set-variable] int parent_level;
> ^~~~~~~~~~~~
>
> fs/btrfs/zoned.c:503:6: warning: variable ‘zone_size' set but not used \
> [-Wunused-but-set-variable] u64 zone_size;
> ^~~~~~~~~
>
> Signed-off-by: Zou Wei <zou_wei@huawei.com>
> ---
> fs/btrfs/ctree.c | 3 ---
> fs/btrfs/zoned.c | 2 --
> 2 files changed, 5 deletions(-)
>
> diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
> index 32a57a7..e5a0941 100644
> --- a/fs/btrfs/ctree.c
> +++ b/fs/btrfs/ctree.c
> @@ -1578,13 +1578,10 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
> int end_slot;
> int i;
> int err = 0;
> - int parent_level;
> u32 blocksize;
> int progress_passed = 0;
> struct btrfs_disk_key disk_key;
>
> - parent_level = btrfs_header_level(parent);
That one folded to the patch, thanks.
> -
> WARN_ON(trans->transaction != fs_info->running_transaction);
> WARN_ON(trans->transid != fs_info->generation);
>
> diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
> index fa9cc61..742f088 100644
> --- a/fs/btrfs/zoned.c
> +++ b/fs/btrfs/zoned.c
> @@ -500,7 +500,6 @@ int btrfs_sb_log_location_bdev(struct block_device *bdev, int \
> mirror, int rw, unsigned int zone_sectors;
> u32 sb_zone;
> int ret;
> - u64 zone_size;
> u8 zone_sectors_shift;
> sector_t nr_sectors = bdev->bd_part->nr_sects;
> u32 nr_zones;
> @@ -515,7 +514,6 @@ int btrfs_sb_log_location_bdev(struct block_device *bdev, int \
> mirror, int rw, zone_sectors = bdev_zone_sectors(bdev);
> if (!is_power_of_2(zone_sectors))
> return -EINVAL;
> - zone_size = zone_sectors << SECTOR_SHIFT;
That was intended to be used a few lines below, so that's not for
removal.
> zone_sectors_shift = ilog2(zone_sectors);
> nr_zones = nr_sectors >> zone_sectors_shift;
>
> --
> 2.6.2
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