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Commit 09940a4f authored by Mel Gorman's avatar Mel Gorman Committed by Linus Torvalds
Browse files

mm, page_alloc: simplify last cpupid reset 



The current reset unnecessarily clears flags and makes pointless
calculations.

Signed-off-by: default avatarMel Gorman <mgorman@techsingularity.net>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5bb1b169

include/linux/mm.h

+1 −4
Original line number Diff line number Diff line
@@ -850,10 +850,7 @@ extern int page_cpupid_xchg_last(struct page *page, int cpupid); 


static inline void page_cpupid_reset_last(struct page *page)

{

	int cpupid = (1 << LAST_CPUPID_SHIFT) - 1;



	page->flags &= ~(LAST_CPUPID_MASK << LAST_CPUPID_PGSHIFT);

	page->flags |= (cpupid & LAST_CPUPID_MASK) << LAST_CPUPID_PGSHIFT;

	page->flags |= LAST_CPUPID_MASK << LAST_CPUPID_PGSHIFT;

}

#endif /* LAST_CPUPID_NOT_IN_PAGE_FLAGS */

#else /* !CONFIG_NUMA_BALANCING */