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mm/page_reporting.c: drop stale list head check in page_reporting_cycle

list_for_each_entry_safe() guarantees that we will never stumble over the
list head; "&page->lru != list" will always evaluate to true. Let's
simplify.

[david@redhat.com: Changelog refinements]

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Link: http://lkml.kernel.org/r/20200818084448.33969-1-richard.weiyang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by

Wei Yang and committed by
Linus Torvalds 58f6f034 c7df08f1

+1 -1
+1 -1
mm/page_reporting.c
··· 178 178 * the new head of the free list before we release the 179 179 * zone lock. 180 180 */ 181 - if (&page->lru != list && !list_is_first(&page->lru, list)) 181 + if (!list_is_first(&page->lru, list)) 182 182 list_rotate_to_front(&page->lru, list); 183 183 184 184 /* release lock before waiting on report processing */