From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx187.postini.com [74.125.245.187]) by kanga.kvack.org (Postfix) with SMTP id 2D93E6B0078 for ; Tue, 15 Jan 2013 19:26:05 -0500 (EST) Received: from /spool/local by e7.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 15 Jan 2013 19:26:04 -0500 Received: from d01relay03.pok.ibm.com (d01relay03.pok.ibm.com [9.56.227.235]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 283ED38C8067 for ; Tue, 15 Jan 2013 19:25:45 -0500 (EST) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r0G0Pijl295972 for ; Tue, 15 Jan 2013 19:25:44 -0500 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r0G0PhPE019021 for ; Tue, 15 Jan 2013 19:25:43 -0500 From: Cody P Schafer Subject: [PATCH 07/17] mm/page_alloc: use zone_spans_pfn() instead of open coding. Date: Tue, 15 Jan 2013 16:24:44 -0800 Message-Id: <1358295894-24167-8-git-send-email-cody@linux.vnet.ibm.com> In-Reply-To: <1358295894-24167-1-git-send-email-cody@linux.vnet.ibm.com> References: <1358295894-24167-1-git-send-email-cody@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Linux MM Cc: LKML , Andrew Morton , Catalin Marinas , Cody P Schafer 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 --- 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org