f2fs: add migration count iff migration happens

If first segment is empty and migration_granularity is 1, we can't move this
at all.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2020-02-09 13:27:09 -08:00
commit 8c7b9ac129