On 04/15/2016 11:07 AM, Mel Gorman wrote:
The current reset unnecessarily clears flags and makes pointless calculations.
Ugh, indeed.
Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
--- include/linux/mm.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index ffcff53e3b2b..60656db00abd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -837,10 +837,7 @@ 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 */
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