f2fs: remove unneeded page uptodate check/set

This patch remove unneeded page uptodate check/set in
f2fs_vm_page_mkwrite, which already done in set_page_dirty.
Signed-off-by: Yunlei He <heyunlei@oppo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/file.c

@@ -149,8 +149,6 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
 		zero_user_segment(page, offset, PAGE_SIZE);
 	}
 	set_page_dirty(page);
-	if (!PageUptodate(page))
-		SetPageUptodate(page);
 
 	f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE);
 	f2fs_update_time(sbi, REQ_TIME);