f2fs: save a multiplication for last_nid calculation

Use a slightly easier way to calculate last_nid.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Fan Li 2017-11-02 11:02:52 +08:00 • committed by Jaegeuk Kim
commit f6986ede80