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[PATCH] NUMA: Add zone_to_nid function

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There are many places where we need to determine the node of a zone.
Currently we use a difficult to read sequence of pointer dereferencing.
Put that into an inline function and use throughout VM.  Maybe we can find
a way to optimize the lookup in the future.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
2006-09-25 23:31:55 -07:00
committed by Linus Torvalds
parent 4415cc8df6
commit 89fa30242f
9 changed files with 17 additions and 13 deletions
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2
mm/hugetlb.c
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@@ -72,7 +72,7 @@ static struct page *dequeue_huge_page(struct vm_area_struct *vma,
struct zone **z;
for (z = zonelist->zones; *z; z++) {
nid = (*z)->zone_pgdat->node_id;
nid = zone_to_nid(*z);
if (cpuset_zone_allowed(*z, GFP_HIGHUSER) &&
!list_empty(&hugepage_freelists[nid]))
break;