From: Anand Jain Date: Thu, 15 Feb 2018 04:29:38 +0000 (+0800) Subject: btrfs: cow_file_range() num_bytes and disk_num_bytes are same X-Git-Tag: v4.19~990^2~153 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3752d22fcea160cc2493e34f5e0e41cdd7fdd921;p=platform%2Fkernel%2Flinux-rpi.git btrfs: cow_file_range() num_bytes and disk_num_bytes are same 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 Reviewed-by: David Sterba Signed-off-by: David Sterba --- diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index f534701..e90d7c5 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -961,7 +961,6 @@ 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; @@ -979,7 +978,6 @@ 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); @@ -1010,15 +1008,14 @@ static noinline int cow_file_range(struct inode *inode, } } - BUG_ON(disk_num_bytes > - btrfs_super_total_bytes(fs_info->super_copy)); + 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); @@ -1082,11 +1079,10 @@ 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;