Commit d0ead157 authored by Tejun Heo's avatar Tejun Heo Committed by H. Peter Anvin
Browse files

x86, mm: s/PAGES_PER_ELEMENT/PAGES_PER_SECTION/ 



DISCONTIGMEM on x86-32 implements pfn -> nid mapping similarly to
SPARSEMEM; however, it calls each mapping unit ELEMENT instead of
SECTION.  This patch renames it to SECTION so that PAGES_PER_SECTION
is valid for both DISCONTIGMEM and SPARSEMEM.  This will be used by
the next patch to implement mapping granularity check.

This patch is trivial constant rename.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20110712074422.GA2872@htj.dyndns.org


Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 620917de

arch/x86/include/asm/mmzone_32.h

+3 −3
Original line number Diff line number Diff line
@@ -34,15 +34,15 @@ static inline void resume_map_numa_kva(pgd_t *pgd) {} 
 *    64Gb / 4096bytes/page = 16777216 pages

 */

#define MAX_NR_PAGES 16777216

#define MAX_ELEMENTS 1024

#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)

#define MAX_SECTIONS 1024

#define PAGES_PER_SECTION (MAX_NR_PAGES/MAX_SECTIONS)



extern s8 physnode_map[];



static inline int pfn_to_nid(unsigned long pfn)

{

#ifdef CONFIG_NUMA

	return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);

	return((int) physnode_map[(pfn) / PAGES_PER_SECTION]);

#else

	return 0;

#endif

arch/x86/mm/numa_32.c

+3 −3
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ 
 *     physnode_map[16-31] = 1;

 *     physnode_map[32- ] = -1;

 */

s8 physnode_map[MAX_ELEMENTS] __read_mostly = { [0 ... (MAX_ELEMENTS - 1)] = -1};

s8 physnode_map[MAX_SECTIONS] __read_mostly = { [0 ... (MAX_SECTIONS - 1)] = -1};

EXPORT_SYMBOL(physnode_map);



void memory_present(int nid, unsigned long start, unsigned long end)
@@ -52,8 +52,8 @@ void memory_present(int nid, unsigned long start, unsigned long end) 
			nid, start, end);

	printk(KERN_DEBUG "  Setting physnode_map array to node %d for pfns:\n", nid);

	printk(KERN_DEBUG "  ");

	for (pfn = start; pfn < end; pfn += PAGES_PER_ELEMENT) {

		physnode_map[pfn / PAGES_PER_ELEMENT] = nid;

	for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {

		physnode_map[pfn / PAGES_PER_SECTION] = nid;

		printk(KERN_CONT "%lx ", pfn);

	}

	printk(KERN_CONT "\n");

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