On 15.02.2018 06:29, Anand Jain wrote:
> This patch deletes local variable disk_num_bytes as its value
> is same as num_bytes in the function cow_file_range().
>
> Signed-off-by: Anand Jain
Reviewed-by: Nikolay Borisov
> ---
> v1->v2:
> Fix conflict.
> Removed Reviewed-by: David Sterba
>as there is a conflict fix.
>
> fs/btrfs/inode.c | 15 ++-
> 1 file changed, 6 insertions(+), 9 deletions(-)
>
> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
> index 8997e39c8e37..4b156e191592 100644
> --- a/fs/btrfs/inode.c
> +++ b/fs/btrfs/inode.c
> @@ -959,7 +959,6 @@ static noinline int cow_file_range(struct inode *inode,
> u64 alloc_hint = 0;
> u64 num_bytes;
> unsigned long ram_size;
> - u64 disk_num_bytes;
> u64 cur_alloc_size = 0;
> u64 blocksize = fs_info->sectorsize;
> struct btrfs_key ins;
> @@ -977,7 +976,6 @@ static noinline int cow_file_range(struct inode *inode,
>
> num_bytes = ALIGN(end - start + 1, blocksize);
> num_bytes = max(blocksize, num_bytes);
> - disk_num_bytes = num_bytes;
>
> inode_should_defrag(BTRFS_I(inode), start, end, num_bytes, SZ_64K);
>
> @@ -1008,15 +1006,15 @@ static noinline int cow_file_range(struct inode
> *inode,
> }
> }
>
> - BUG_ON(disk_num_bytes >
> + BUG_ON(num_bytes >
> btrfs_super_total_bytes(fs_info->super_copy));
>
> alloc_hint = get_extent_allocation_hint(inode, start, num_bytes);
> btrfs_drop_extent_cache(BTRFS_I(inode), start,
> start + num_bytes - 1, 0);
>
> - while (disk_num_bytes > 0) {
> - cur_alloc_size = disk_num_bytes;
> + while (num_bytes > 0) {
> + cur_alloc_size = num_bytes;
> ret = btrfs_reserve_extent(root, cur_alloc_size, cur_alloc_size,
> fs_info->sectorsize, 0, alloc_hint,
> &ins, 1, 1);
> @@ -1080,11 +1078,10 @@ static noinline int cow_file_range(struct inode
> *inode,
>delalloc_end, locked_page,
>EXTENT_LOCKED | EXTENT_DELALLOC,
>page_ops);
> - if (disk_num_bytes < cur_alloc_size)
> - disk_num_bytes = 0;
> + if (num_bytes < cur_alloc_size)
> + num_bytes = 0;
> else
> - disk_num_bytes -= cur_alloc_size;
> - num_bytes -= cur_alloc_size;
> + num_bytes -= cur_alloc_size;
> alloc_hint = ins.objectid + ins.offset;
> start += cur_alloc_size;
> extent_reserved = false;
>
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