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Date: Tue, 15 Jan 2013 16:24:44 -0800 From: Cody P Schafer <cody@...ux.vnet.ibm.com> To: Linux MM <linux-mm@...ck.org> Cc: LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Catalin Marinas <catalin.marinas@....com>, Cody P Schafer <cody@...ux.vnet.ibm.com> Subject: [PATCH 07/17] mm/page_alloc: use zone_spans_pfn() instead of open coding. Use zone_spans_pfn() instead of open coding pfn ownership checks. This is split from following patch as could slightly degrade the generated code. Pre-patch, the code uses it's knowledge that start_pfn < end_pfn to cut down on the number of comparisons. Post-patch, the compiler has to figure it out. Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com> --- mm/page_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index da5a5ec..3911c1a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -978,9 +978,9 @@ int move_freepages_block(struct zone *zone, struct page *page, end_pfn = start_pfn + pageblock_nr_pages - 1; /* Do not cross zone boundaries */ - if (start_pfn < zone->zone_start_pfn) + if (!zone_spans_pfn(zone, start_pfn)) start_page = page; - if (end_pfn >= zone->zone_start_pfn + zone->spanned_pages) + if (!zone_spans_pfn(zone, end_pfn)) return 0; return move_freepages(zone, start_page, end_page, migratetype); -- 1.8.0.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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