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authorCody P Schafer <cody@linux.vnet.ibm.com>2013-02-22 19:35:23 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 20:50:20 -0500
commit108bcc96ef7047c02cad4d229f04da38186a3f3f (patch)
treee11d82074cae54dcf0fa8eea12750c661a16b02d /mm/kmemleak.c
parent9127ab4ff92f0ecd7b4671efa9d0edb21c691e9f (diff)
mm: add & use zone_end_pfn() and zone_spans_pfn()
Add 2 helpers (zone_end_pfn() and zone_spans_pfn()) to reduce code duplication. This also switches to using them in compaction (where an additional variable needed to be renamed), page_alloc, vmstat, memory_hotplug, and kmemleak. Note that in compaction.c I avoid calling zone_end_pfn() repeatedly because I expect at some point the sycronization issues with start_pfn & spanned_pages will need fixing, either by actually using the seqlock or clever memory barrier usage. Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: David Hansen <dave@linux.vnet.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kmemleak.c')
-rw-r--r--mm/kmemleak.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 752a705c77c2..83dd5fbf5e60 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1300,9 +1300,8 @@ static void kmemleak_scan(void)
1300 */ 1300 */
1301 lock_memory_hotplug(); 1301 lock_memory_hotplug();
1302 for_each_online_node(i) { 1302 for_each_online_node(i) {
1303 pg_data_t *pgdat = NODE_DATA(i); 1303 unsigned long start_pfn = node_start_pfn(i);
1304 unsigned long start_pfn = pgdat->node_start_pfn; 1304 unsigned long end_pfn = node_end_pfn(i);
1305 unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages;
1306 unsigned long pfn; 1305 unsigned long pfn;
1307 1306
1308 for (pfn = start_pfn; pfn < end_pfn; pfn++) { 1307 for (pfn = start_pfn; pfn < end_pfn; pfn++) {