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include/linux/nodemask.h: create next_node_in() helper

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Lots of code does

	node = next_node(node, XXX);
	if (node == MAX_NUMNODES)
		node = first_node(XXX);

so create next_node_in() to do this and use it in various places.

[[email protected]: use next_node_in() helper]
Acked-by: Vlastimil Babka <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Signed-off-by: Michal Hocko <[email protected]>
Cc: Xishi Qiu <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: Laura Abbott <[email protected]>
Cc: Hui Zhu <[email protected]>
Cc: Wang Xiaoqiang <[email protected]>
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrew Morton 2016-05-19 17:10:58 -07:00 • committed by Linus Torvalds
commit 0edaf86cf1
11 changed files with 54 additions and 59 deletions
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24
mm/mempolicy.c
View file

@ -97,7 +97,6 @@
#include <asm/tlbflush.h>
#include <asm/uaccess.h>
#include <linux/random.h>
#include "internal.h"
@ -347,9 +346,7 @@ static void mpol_rebind_nodemask(struct mempolicy *pol, const nodemask_t *nodes,
BUG();
if (!node_isset(current->il_next, tmp)) {
current->il_next = next_node(current->il_next, tmp);
if (current->il_next >= MAX_NUMNODES)
current->il_next = first_node(tmp);
current->il_next = next_node_in(current->il_next, tmp);
if (current->il_next >= MAX_NUMNODES)
current->il_next = numa_node_id();
}
@ -1709,9 +1706,7 @@ static unsigned interleave_nodes(struct mempolicy *policy)
struct task_struct *me = current;
nid = me->il_next;
next = next_node(nid, policy->v.nodes);
if (next >= MAX_NUMNODES)
next = first_node(policy->v.nodes);
next = next_node_in(nid, policy->v.nodes);
if (next < MAX_NUMNODES)
me->il_next = next;
return nid;
@ -1805,21 +1800,6 @@ static inline unsigned interleave_nid(struct mempolicy *pol,
return interleave_nodes(pol);
}
/*
* Return the bit number of a random bit set in the nodemask.
* (returns NUMA_NO_NODE if nodemask is empty)
*/
int node_random(const nodemask_t *maskp)
{
int w, bit = NUMA_NO_NODE;
w = nodes_weight(*maskp);
if (w)
bit = bitmap_ord_to_pos(maskp->bits,
get_random_int() % w, MAX_NUMNODES);
return bit;
}
#ifdef CONFIG_HUGETLBFS
/*
* huge_zonelist(@vma, @addr, @gfp_flags, @mpol)