linux-kernel - [PATCH] mm: Simplify code by SECTION_ALIGN_UP() and SECTION_ALIGN

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Date:	Thu, 9 Jun 2011 20:20:35 +0200
From:	Daniel Kiper <dkiper@...-space.pl>
To:	rientjes@...gle.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH] mm: Simplify code by SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro usage

git commit a539f3533b78e39a22723d6d3e1e11b6c14454d9 (mm: add SECTION_ALIGN_UP()
and SECTION_ALIGN_DOWN() macro) introduced SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN()
macro. Use those macros to increase code readability.

This patch applies to Linus' git tree, v3.0-rc2 tag.

Signed-off-by: Daniel Kiper <dkiper@...-space.pl>
---
 mm/page_cgroup.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 74ccff6..d818525 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -222,8 +222,8 @@ int __meminit online_page_cgroup(unsigned long start_pfn,
 	unsigned long start, end, pfn;
 	int fail = 0;
 
-	start = start_pfn & ~(PAGES_PER_SECTION - 1);
-	end = ALIGN(start_pfn + nr_pages, PAGES_PER_SECTION);
+	start = SECTION_ALIGN_DOWN(start_pfn);
+	end = SECTION_ALIGN_UP(start_pfn + nr_pages);
 
 	for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION) {
 		if (!pfn_present(pfn))
@@ -245,8 +245,8 @@ int __meminit offline_page_cgroup(unsigned long start_pfn,
 {
 	unsigned long start, end, pfn;
 
-	start = start_pfn & ~(PAGES_PER_SECTION - 1);
-	end = ALIGN(start_pfn + nr_pages, PAGES_PER_SECTION);
+	start = SECTION_ALIGN_DOWN(start_pfn);
+	end = SECTION_ALIGN_UP(start_pfn + nr_pages);
 
 	for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION)
 		__free_page_cgroup(pfn);
-- 
1.5.6.5
--
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