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Commit c1e6c8d0 authored by Lee Schermerhorn's avatar Lee Schermerhorn Committed by Linus Torvalds
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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: default avatarLee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: default avatarMel Gorman <mel@csn.ul.ie>
Reviewed-by: default avatarAndi Kleen <andi@firstfloor.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Eric Whitney <eric.whitney@hp.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6ae11b27

include/linux/nodemask.h

+8 −3
Original line number Diff line number Diff line
@@ -245,14 +245,19 @@ static inline int __next_node(int n, const nodemask_t *srcp) 
	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);				\

	} else {							\

		nodes_clear(m);						\

		node_set((node), m);					\

		init_nodemask_of_node(&m, (node));			\

	}								\

	m;								\

})