Since commit 
a9e7c39fa9fd9 ("mm/vmscan.c: remove 7th argument of
isolate_lru_pages()"), the explanation of 'mode' argument has been
unnecessary.  Let's remove it.
Signed-off-by: Qiwu Chen <chenqiwu@xiaomi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200501090346.2894-1-chenqiwu@xiaomi.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  * @dst:       The temp list to put pages on to.
  * @nr_scanned:        The number of pages that were scanned.
  * @sc:                The scan_control struct for this reclaim session
- * @mode:      One of the LRU isolation modes
  * @lru:       LRU list id for isolating
  *
  * returns how many pages were moved onto *@dst.