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xen-devel
[Xen-devel] [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_
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ian.campbell@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, andi.kleen@xxxxxxxxx, haicheng.li@xxxxxxxxxxxxxxx, fengguang.wu@xxxxxxxxx, jeremy@xxxxxxxx, konrad.wilk@xxxxxxxxxx, dan.magenheimer@xxxxxxxxxx, v.tolstov@xxxxxxxxx, pasik@xxxxxx, dave@xxxxxxxxxxxxxxxxxx, wdauchy@xxxxxxxxx, rientjes@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx |
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Subject: |
[Xen-devel] [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro |
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From: |
Daniel Kiper <dkiper@xxxxxxxxxxxx> |
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Date: |
Tue, 17 May 2011 23:37:50 +0200 |
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Tue, 17 May 2011 14:39:02 -0700 |
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Mutt/1.3.28i |
Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro which aligns
given pfn to upper section and lower section boundary accordingly.
Signed-off-by: Daniel Kiper <dkiper@xxxxxxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
include/linux/mmzone.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index d715200..217bcf6 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -956,6 +956,9 @@ static inline unsigned long early_pfn_to_nid(unsigned long
pfn)
#define pfn_to_section_nr(pfn) ((pfn) >> PFN_SECTION_SHIFT)
#define section_nr_to_pfn(sec) ((sec) << PFN_SECTION_SHIFT)
+#define SECTION_ALIGN_UP(pfn) (((pfn) + PAGES_PER_SECTION - 1) &
PAGE_SECTION_MASK)
+#define SECTION_ALIGN_DOWN(pfn) ((pfn) & PAGE_SECTION_MASK)
+
struct page;
struct page_cgroup;
struct mem_section {
--
1.5.6.5
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