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authorFan Li <fanofcode.li@samsung.com>2017-06-02 15:45:42 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2017-07-04 02:11:34 -0700
commit72fdbe2efe3e42a54e268d2ee2a8c0828d3996e7 (patch)
tree4d2abe0f9dedc0a2107152c812653838f77a5e0d /fs/f2fs/node.h
parent21d3f8e1c3b7996ce239ab6fa82e9f7a8c47d84d (diff)
downloadlinux-72fdbe2efe3e42a54e268d2ee2a8c0828d3996e7.tar.bz2
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>
Diffstat (limited to 'fs/f2fs/node.h')
-rw-r--r--fs/f2fs/node.h6
1 files changed, 1 insertions, 5 deletions
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 558048e33cf9..bb53e9955ff2 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -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;
}