[PATCH 4/12] hugetlb: factor init_nodemask_of_node

[Lee Schermerhorn <lee.schermerhorn@hp.com>]

[PATCH 4/12] hugetlb:  factor init_nodemask_of_node()

Factor init_nodemask_of_node() out of the nodemask_of_node()
macro.

This will be used to populate the huge pages "nodes_allowed"
nodemask for a single node when basing nodes_allowed on a
preferred/local mempolicy or when a persistent huge page
pool page count is modified via a per node sysfs attribute.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Andi Kleen <andi@firstfloor.org>

---

Against:  2.6.31-mmotm-090925-1435

New in V5 of series

V6: + rename 'init_nodemask_of_nodes()' to 'init_nodemask_of_node()'
    + redefine init_nodemask_of_node() as static inline fcn
    + move this patch back 1 in series

V8: + factor 'init_nodemask_of_node()' from nodemask_of_node()
    + drop alloc_nodemask_of_node() -- not used any more

V9: + remove extra parens around arguments now that init_nodemask_of_node
      is not longer a macro.

V10:  REALLY remove the extra parentheses.  Duh!

 include/linux/nodemask.h |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

Index: linux-2.6.31-mmotm-090925-1435/include/linux/nodemask.h
===================================================================
--- linux-2.6.31-mmotm-090925-1435.orig/include/linux/nodemask.h	2009-10-07 12:31:53.000000000 -0400
+++ linux-2.6.31-mmotm-090925-1435/include/linux/nodemask.h	2009-10-07 12:31:58.000000000 -0400
@@ -245,14 +245,19 @@ static inline int __next_node(int n, con
 	return min_t(int,MAX_NUMNODES,find_next_bit(srcp->bits, MAX_NUMNODES, n+1));
 }
 
+static inline void init_nodemask_of_node(nodemask_t *mask, int node)
+{
+	nodes_clear(*mask);
+	node_set(node, *mask);
+}
+
 #define nodemask_of_node(node)						\
 ({									\
 	typeof(_unused_nodemask_arg_) m;				\
 	if (sizeof(m) == sizeof(unsigned long)) {			\
-		m.bits[0] = 1UL<<(node);				\
+		m.bits[0] = 1UL << (node);				\
 	} else {							\
-		nodes_clear(m);						\
-		node_set((node), m);					\
+		init_nodemask_of_node(&m, (node));			\
 	}								\
 	m;								\
 })

--
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/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>