* [PATCH V2 1/1] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro
@ 2011-05-02 21:47 Daniel Kiper
0 siblings, 0 replies; only message in thread
From: Daniel Kiper @ 2011-05-02 21:47 UTC (permalink / raw)
To: ian.campbell, akpm, andi.kleen, haicheng.li, fengguang.wu,
jeremy, konrad.wilk, dan.magenheimer, v.tolstov, pasik, dave,
wdauchy, rientjes, xen-devel, linux-kernel, linux-mm
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@net-space.pl>
---
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
--
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/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2011-05-02 21:47 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-05-02 21:47 [PATCH V2 1/1] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro Daniel Kiper
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox