mm: fix page reclaim comment error
Since there are five lists in LRU cache, the array nr in get_scan_count should be: nr[0] = anon inactive pages to scan; nr[1] = anon active pages to scan nr[2] = file inactive pages to scan; nr[3] = file active pages to scan Signed-off-by: NWanpeng Li <liwp.linux@gmail.com> Reviewed-by: NRik van Riel <riel@redhat.com> Acked-by: NMinchan Kim <minchan@kernel.org> Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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