Commit 6746cca4 authored Jun 02, 2017 by Fan Li Committed by Jaegeuk Kim Jul 10, 2017

f2fs: simplify the way of calulating next nat address



The index of segment which the next nat block is in has only one different
bit than the current one, so to get the next nat address, we can simply
alter that one bit.

Signed-off-by: Fan Li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent d3fbc0fb

fs/f2fs/node.h

+1 −5

Original line number	Diff line number	Diff line
		@@ -224,11 +224,7 @@ static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
		struct f2fs_nm_info *nm_i = NM_I(sbi);

		block_addr -= nm_i->nat_blkaddr;
		if ((block_addr >> sbi->log_blocks_per_seg) % 2)
		block_addr -= sbi->blocks_per_seg;
		else
		block_addr += sbi->blocks_per_seg;

		block_addr ^= 1 << sbi->log_blocks_per_seg;
		return block_addr + nm_i->nat_blkaddr;
		}