include/linux/nodemask.h - kernel/msm-4.19 - Gitiles

 #ifndef __LINUX_NODEMASK_H
 #define __LINUX_NODEMASK_H

 /*
  * Nodemasks provide a bitmap suitable for representing the
  * set of Node's in a system, one bit position per Node number.
  *
  * See detailed comments in the file linux/bitmap.h describing the
  * data type on which these nodemasks are based.
  *
  * For details of nodemask_scnprintf() and nodemask_parse(),
  * see bitmap_scnprintf() and bitmap_parse() in lib/bitmap.c.
  * For details of nodelist_scnprintf() and nodelist_parse(), see
  * bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
  * For details of node_remap(), see bitmap_bitremap in lib/bitmap.c.
  * For details of nodes_remap(), see bitmap_remap in lib/bitmap.c.
  *
  * The available nodemask operations are:
  *
  * void node_set(node, mask)		turn on bit 'node' in mask
  * void node_clear(node, mask)		turn off bit 'node' in mask
  * void nodes_setall(mask)		set all bits
  * void nodes_clear(mask)		clear all bits
  * int node_isset(node, mask)		true iff bit 'node' set in mask
  * int node_test_and_set(node, mask)	test and set bit 'node' in mask
  *
  * void nodes_and(dst, src1, src2)	dst = src1 & src2  [intersection]
  * void nodes_or(dst, src1, src2)	dst = src1 | src2  [union]
  * void nodes_xor(dst, src1, src2)	dst = src1 ^ src2
  * void nodes_andnot(dst, src1, src2)	dst = src1 & ~src2
  * void nodes_complement(dst, src)	dst = ~src
  *
  * int nodes_equal(mask1, mask2)	Does mask1 == mask2?
  * int nodes_intersects(mask1, mask2)	Do mask1 and mask2 intersect?
  * int nodes_subset(mask1, mask2)	Is mask1 a subset of mask2?
  * int nodes_empty(mask)		Is mask empty (no bits sets)?
  * int nodes_full(mask)			Is mask full (all bits sets)?
  * int nodes_weight(mask)		Hamming weight - number of set bits
  *
  * void nodes_shift_right(dst, src, n)	Shift right
  * void nodes_shift_left(dst, src, n)	Shift left
  *
  * int first_node(mask)			Number lowest set bit, or MAX_NUMNODES
  * int next_node(node, mask)		Next node past 'node', or MAX_NUMNODES
  * int first_unset_node(mask)		First node not set in mask, or
  *					MAX_NUMNODES.
  *
  * nodemask_t nodemask_of_node(node)	Return nodemask with bit 'node' set
  * NODE_MASK_ALL			Initializer - all bits set
  * NODE_MASK_NONE			Initializer - no bits set
  * unsigned long *nodes_addr(mask)	Array of unsigned long's in mask
  *
  * int nodemask_scnprintf(buf, len, mask) Format nodemask for printing
  * int nodemask_parse(ubuf, ulen, mask)	Parse ascii string as nodemask
  * int nodelist_scnprintf(buf, len, mask) Format nodemask as list for printing
  * int nodelist_parse(buf, map)		Parse ascii string as nodelist
  * int node_remap(oldbit, old, new)	newbit = map(old, new)(oldbit)
  * int nodes_remap(dst, src, old, new)	*dst = map(old, new)(dst)
  *
  * for_each_node_mask(node, mask)	for-loop node over mask
  *
  * int num_online_nodes()		Number of online Nodes
  * int num_possible_nodes()		Number of all possible Nodes
  *
  * int node_online(node)		Is some node online?
  * int node_possible(node)		Is some node possible?
  *
  * int any_online_node(mask)		First online node in mask
  *
  * node_set_online(node)		set bit 'node' in node_online_map
  * node_set_offline(node)		clear bit 'node' in node_online_map
  *
  * for_each_node(node)			for-loop node over node_possible_map
  * for_each_online_node(node)		for-loop node over node_online_map
  *
  * Subtlety:
  * 1) The 'type-checked' form of node_isset() causes gcc (3.3.2, anyway)
  *    to generate slightly worse code.  So use a simple one-line #define
  *    for node_isset(), instead of wrapping an inline inside a macro, the
  *    way we do the other calls.
  */

 #include <linux/kernel.h>
 #include <linux/threads.h>
 #include <linux/bitmap.h>
 #include <linux/numa.h>

 typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t;
 extern nodemask_t _unused_nodemask_arg_;

 #define node_set(node, dst) __node_set((node), &(dst))
 static inline void __node_set(int node, volatile nodemask_t *dstp)
 {
 	set_bit(node, dstp->bits);
 }

 #define node_clear(node, dst) __node_clear((node), &(dst))
 static inline void __node_clear(int node, volatile nodemask_t *dstp)
 {
 	clear_bit(node, dstp->bits);
 }

 #define nodes_setall(dst) __nodes_setall(&(dst), MAX_NUMNODES)
 static inline void __nodes_setall(nodemask_t *dstp, int nbits)
 {
 	bitmap_fill(dstp->bits, nbits);
 }

 #define nodes_clear(dst) __nodes_clear(&(dst), MAX_NUMNODES)
 static inline void __nodes_clear(nodemask_t *dstp, int nbits)
 {
 	bitmap_zero(dstp->bits, nbits);
 }

 /* No static inline type checking - see Subtlety (1) above. */
 #define node_isset(node, nodemask) test_bit((node), (nodemask).bits)

 #define node_test_and_set(node, nodemask) \
 			__node_test_and_set((node), &(nodemask))
 static inline int __node_test_and_set(int node, nodemask_t *addr)
 {
 	return test_and_set_bit(node, addr->bits);
 }

 #define nodes_and(dst, src1, src2) \
 			__nodes_and(&(dst), &(src1), &(src2), MAX_NUMNODES)
 static inline void __nodes_and(nodemask_t *dstp, const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
 }

 #define nodes_or(dst, src1, src2) \
 			__nodes_or(&(dst), &(src1), &(src2), MAX_NUMNODES)
 static inline void __nodes_or(nodemask_t *dstp, const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
 }

 #define nodes_xor(dst, src1, src2) \
 			__nodes_xor(&(dst), &(src1), &(src2), MAX_NUMNODES)
 static inline void __nodes_xor(nodemask_t *dstp, const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
 }

 #define nodes_andnot(dst, src1, src2) \
 			__nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
 static inline void __nodes_andnot(nodemask_t *dstp, const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
 }

 #define nodes_complement(dst, src) \
 			__nodes_complement(&(dst), &(src), MAX_NUMNODES)
 static inline void __nodes_complement(nodemask_t *dstp,
 					const nodemask_t *srcp, int nbits)
 {
 	bitmap_complement(dstp->bits, srcp->bits, nbits);
 }

 #define nodes_equal(src1, src2) \
 			__nodes_equal(&(src1), &(src2), MAX_NUMNODES)
 static inline int __nodes_equal(const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	return bitmap_equal(src1p->bits, src2p->bits, nbits);
 }

 #define nodes_intersects(src1, src2) \
 			__nodes_intersects(&(src1), &(src2), MAX_NUMNODES)
 static inline int __nodes_intersects(const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	return bitmap_intersects(src1p->bits, src2p->bits, nbits);
 }

 #define nodes_subset(src1, src2) \
 			__nodes_subset(&(src1), &(src2), MAX_NUMNODES)
 static inline int __nodes_subset(const nodemask_t *src1p,
 					const nodemask_t *src2p, int nbits)
 {
 	return bitmap_subset(src1p->bits, src2p->bits, nbits);
 }

 #define nodes_empty(src) __nodes_empty(&(src), MAX_NUMNODES)
 static inline int __nodes_empty(const nodemask_t *srcp, int nbits)
 {
 	return bitmap_empty(srcp->bits, nbits);
 }

 #define nodes_full(nodemask) __nodes_full(&(nodemask), MAX_NUMNODES)
 static inline int __nodes_full(const nodemask_t *srcp, int nbits)
 {
 	return bitmap_full(srcp->bits, nbits);
 }

 #define nodes_weight(nodemask) __nodes_weight(&(nodemask), MAX_NUMNODES)
 static inline int __nodes_weight(const nodemask_t *srcp, int nbits)
 {
 	return bitmap_weight(srcp->bits, nbits);
 }

 #define nodes_shift_right(dst, src, n) \
 			__nodes_shift_right(&(dst), &(src), (n), MAX_NUMNODES)
 static inline void __nodes_shift_right(nodemask_t *dstp,
 					const nodemask_t *srcp, int n, int nbits)
 {
 	bitmap_shift_right(dstp->bits, srcp->bits, n, nbits);
 }

 #define nodes_shift_left(dst, src, n) \
 			__nodes_shift_left(&(dst), &(src), (n), MAX_NUMNODES)
 static inline void __nodes_shift_left(nodemask_t *dstp,
 					const nodemask_t *srcp, int n, int nbits)
 {
 	bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
 }

 /* FIXME: better would be to fix all architectures to never return
           > MAX_NUMNODES, then the silly min_ts could be dropped. */

 #define first_node(src) __first_node(&(src))
 static inline int __first_node(const nodemask_t *srcp)
 {
 	return min_t(int, MAX_NUMNODES, find_first_bit(srcp->bits, MAX_NUMNODES));
 }

 #define next_node(n, src) __next_node((n), &(src))
 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));
 }

 #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);					\
 	}								\
 	m;								\
 })

 #define first_unset_node(mask) __first_unset_node(&(mask))
 static inline int __first_unset_node(const nodemask_t *maskp)
 {
 	return min_t(int,MAX_NUMNODES,
 			find_first_zero_bit(maskp->bits, MAX_NUMNODES));
 }

 #define NODE_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(MAX_NUMNODES)

 #if MAX_NUMNODES <= BITS_PER_LONG

 #define NODE_MASK_ALL							\
 ((nodemask_t) { {							\
 	[BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD		\
 } })

 #else

 #define NODE_MASK_ALL							\
 ((nodemask_t) { {							\
 	[0 ... BITS_TO_LONGS(MAX_NUMNODES)-2] = ~0UL,			\
 	[BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD		\
 } })

 #endif

 #define NODE_MASK_NONE							\
 ((nodemask_t) { {							\
 	[0 ... BITS_TO_LONGS(MAX_NUMNODES)-1] =  0UL			\
 } })

 #define nodes_addr(src) ((src).bits)

 #define nodemask_scnprintf(buf, len, src) \
 			__nodemask_scnprintf((buf), (len), &(src), MAX_NUMNODES)
 static inline int __nodemask_scnprintf(char *buf, int len,
 					const nodemask_t *srcp, int nbits)
 {
 	return bitmap_scnprintf(buf, len, srcp->bits, nbits);
 }

 #define nodemask_parse(ubuf, ulen, dst) \
 			__nodemask_parse((ubuf), (ulen), &(dst), MAX_NUMNODES)
 static inline int __nodemask_parse(const char __user *buf, int len,
 					nodemask_t *dstp, int nbits)
 {
 	return bitmap_parse(buf, len, dstp->bits, nbits);
 }

 #define nodelist_scnprintf(buf, len, src) \
 			__nodelist_scnprintf((buf), (len), &(src), MAX_NUMNODES)
 static inline int __nodelist_scnprintf(char *buf, int len,
 					const nodemask_t *srcp, int nbits)
 {
 	return bitmap_scnlistprintf(buf, len, srcp->bits, nbits);
 }

 #define nodelist_parse(buf, dst) __nodelist_parse((buf), &(dst), MAX_NUMNODES)
 static inline int __nodelist_parse(const char *buf, nodemask_t *dstp, int nbits)
 {
 	return bitmap_parselist(buf, dstp->bits, nbits);
 }

 #define node_remap(oldbit, old, new) \
 		__node_remap((oldbit), &(old), &(new), MAX_NUMNODES)
 static inline int __node_remap(int oldbit,
 		const nodemask_t *oldp, const nodemask_t *newp, int nbits)
 {
 	return bitmap_bitremap(oldbit, oldp->bits, newp->bits, nbits);
 }

 #define nodes_remap(dst, src, old, new) \
 		__nodes_remap(&(dst), &(src), &(old), &(new), MAX_NUMNODES)
 static inline void __nodes_remap(nodemask_t *dstp, const nodemask_t *srcp,
 		const nodemask_t *oldp, const nodemask_t *newp, int nbits)
 {
 	bitmap_remap(dstp->bits, srcp->bits, oldp->bits, newp->bits, nbits);
 }

 #if MAX_NUMNODES > 1
 #define for_each_node_mask(node, mask)			\
 	for ((node) = first_node(mask);			\
 		(node) < MAX_NUMNODES;			\
 		(node) = next_node((node), (mask)))
 #else /* MAX_NUMNODES == 1 */
 #define for_each_node_mask(node, mask)			\
 	if (!nodes_empty(mask))				\
 		for ((node) = 0; (node) < 1; (node)++)
 #endif /* MAX_NUMNODES */

 /*
  * The following particular system nodemasks and operations
  * on them manage all possible and online nodes.
  */

 extern nodemask_t node_online_map;
 extern nodemask_t node_possible_map;

 #if MAX_NUMNODES > 1
 #define num_online_nodes()	nodes_weight(node_online_map)
 #define num_possible_nodes()	nodes_weight(node_possible_map)
 #define node_online(node)	node_isset((node), node_online_map)
 #define node_possible(node)	node_isset((node), node_possible_map)
 #define first_online_node	first_node(node_online_map)
 #define next_online_node(nid)	next_node((nid), node_online_map)
 int highest_possible_node_id(void);
 #else
 #define num_online_nodes()	1
 #define num_possible_nodes()	1
 #define node_online(node)	((node) == 0)
 #define node_possible(node)	((node) == 0)
 #define first_online_node	0
 #define next_online_node(nid)	(MAX_NUMNODES)
 #define highest_possible_node_id()	0
 #endif

 #define any_online_node(mask)			\
 ({						\
 	int node;				\
 	for_each_node_mask(node, (mask))	\
 		if (node_online(node))		\
 			break;			\
 	node;					\
 })

 #define node_set_online(node)	   set_bit((node), node_online_map.bits)
 #define node_set_offline(node)	   clear_bit((node), node_online_map.bits)

 #define for_each_node(node)	   for_each_node_mask((node), node_possible_map)
 #define for_each_online_node(node) for_each_node_mask((node), node_online_map)

 #endif /* __LINUX_NODEMASK_H */
	#ifndef __LINUX_NODEMASK_H
	#define __LINUX_NODEMASK_H

	/*
	* Nodemasks provide a bitmap suitable for representing the
	* set of Node's in a system, one bit position per Node number.
	*
	* See detailed comments in the file linux/bitmap.h describing the
	* data type on which these nodemasks are based.
	*
	* For details of nodemask_scnprintf() and nodemask_parse(),
	* see bitmap_scnprintf() and bitmap_parse() in lib/bitmap.c.
	* For details of nodelist_scnprintf() and nodelist_parse(), see
	* bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
	* For details of node_remap(), see bitmap_bitremap in lib/bitmap.c.
	* For details of nodes_remap(), see bitmap_remap in lib/bitmap.c.
	*
	* The available nodemask operations are:
	*
	* void node_set(node, mask) turn on bit 'node' in mask
	* void node_clear(node, mask) turn off bit 'node' in mask
	* void nodes_setall(mask) set all bits
	* void nodes_clear(mask) clear all bits
	* int node_isset(node, mask) true iff bit 'node' set in mask
	* int node_test_and_set(node, mask) test and set bit 'node' in mask
	*
	* void nodes_and(dst, src1, src2) dst = src1 & src2 [intersection]
	* void nodes_or(dst, src1, src2) dst = src1 \| src2 [union]
	* void nodes_xor(dst, src1, src2) dst = src1 ^ src2
	* void nodes_andnot(dst, src1, src2) dst = src1 & ~src2
	* void nodes_complement(dst, src) dst = ~src
	*
	* int nodes_equal(mask1, mask2) Does mask1 == mask2?
	* int nodes_intersects(mask1, mask2) Do mask1 and mask2 intersect?
	* int nodes_subset(mask1, mask2) Is mask1 a subset of mask2?
	* int nodes_empty(mask) Is mask empty (no bits sets)?
	* int nodes_full(mask) Is mask full (all bits sets)?
	* int nodes_weight(mask) Hamming weight - number of set bits
	*
	* void nodes_shift_right(dst, src, n) Shift right
	* void nodes_shift_left(dst, src, n) Shift left
	*
	* int first_node(mask) Number lowest set bit, or MAX_NUMNODES
	* int next_node(node, mask) Next node past 'node', or MAX_NUMNODES
	* int first_unset_node(mask) First node not set in mask, or
	* MAX_NUMNODES.
	*
	* nodemask_t nodemask_of_node(node) Return nodemask with bit 'node' set
	* NODE_MASK_ALL Initializer - all bits set
	* NODE_MASK_NONE Initializer - no bits set
	* unsigned long *nodes_addr(mask) Array of unsigned long's in mask
	*
	* int nodemask_scnprintf(buf, len, mask) Format nodemask for printing
	* int nodemask_parse(ubuf, ulen, mask) Parse ascii string as nodemask
	* int nodelist_scnprintf(buf, len, mask) Format nodemask as list for printing
	* int nodelist_parse(buf, map) Parse ascii string as nodelist
	* int node_remap(oldbit, old, new) newbit = map(old, new)(oldbit)
	* int nodes_remap(dst, src, old, new) *dst = map(old, new)(dst)
	*
	* for_each_node_mask(node, mask) for-loop node over mask
	*
	* int num_online_nodes() Number of online Nodes
	* int num_possible_nodes() Number of all possible Nodes
	*
	* int node_online(node) Is some node online?
	* int node_possible(node) Is some node possible?
	*
	* int any_online_node(mask) First online node in mask
	*
	* node_set_online(node) set bit 'node' in node_online_map
	* node_set_offline(node) clear bit 'node' in node_online_map
	*
	* for_each_node(node) for-loop node over node_possible_map
	* for_each_online_node(node) for-loop node over node_online_map
	*
	* Subtlety:
	* 1) The 'type-checked' form of node_isset() causes gcc (3.3.2, anyway)
	* to generate slightly worse code. So use a simple one-line #define
	* for node_isset(), instead of wrapping an inline inside a macro, the
	* way we do the other calls.
	*/

	#include <linux/kernel.h>
	#include <linux/threads.h>
	#include <linux/bitmap.h>
	#include <linux/numa.h>

	typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t;
	extern nodemask_t _unused_nodemask_arg_;

	#define node_set(node, dst) __node_set((node), &(dst))
	static inline void __node_set(int node, volatile nodemask_t *dstp)
	{
	set_bit(node, dstp->bits);
	}

	#define node_clear(node, dst) __node_clear((node), &(dst))
	static inline void __node_clear(int node, volatile nodemask_t *dstp)
	{
	clear_bit(node, dstp->bits);
	}

	#define nodes_setall(dst) __nodes_setall(&(dst), MAX_NUMNODES)
	static inline void __nodes_setall(nodemask_t *dstp, int nbits)
	{
	bitmap_fill(dstp->bits, nbits);
	}

	#define nodes_clear(dst) __nodes_clear(&(dst), MAX_NUMNODES)
	static inline void __nodes_clear(nodemask_t *dstp, int nbits)
	{
	bitmap_zero(dstp->bits, nbits);
	}

	/* No static inline type checking - see Subtlety (1) above. */
	#define node_isset(node, nodemask) test_bit((node), (nodemask).bits)

	#define node_test_and_set(node, nodemask) \
	__node_test_and_set((node), &(nodemask))
	static inline int __node_test_and_set(int node, nodemask_t *addr)
	{
	return test_and_set_bit(node, addr->bits);
	}

	#define nodes_and(dst, src1, src2) \
	__nodes_and(&(dst), &(src1), &(src2), MAX_NUMNODES)
	static inline void __nodes_and(nodemask_t dstp, const nodemask_t src1p,
	const nodemask_t *src2p, int nbits)
	{
	bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
	}

	#define nodes_or(dst, src1, src2) \
	__nodes_or(&(dst), &(src1), &(src2), MAX_NUMNODES)
	static inline void __nodes_or(nodemask_t dstp, const nodemask_t src1p,
	const nodemask_t *src2p, int nbits)
	{
	bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
	}

	#define nodes_xor(dst, src1, src2) \
	__nodes_xor(&(dst), &(src1), &(src2), MAX_NUMNODES)
	static inline void __nodes_xor(nodemask_t dstp, const nodemask_t src1p,
	const nodemask_t *src2p, int nbits)
	{
	bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
	}

	#define nodes_andnot(dst, src1, src2) \
	__nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
	static inline void __nodes_andnot(nodemask_t dstp, const nodemask_t src1p,
	const nodemask_t *src2p, int nbits)
	{
	bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
	}

	#define nodes_complement(dst, src) \
	__nodes_complement(&(dst), &(src), MAX_NUMNODES)
	static inline void __nodes_complement(nodemask_t *dstp,
	const nodemask_t *srcp, int nbits)
	{
	bitmap_complement(dstp->bits, srcp->bits, nbits);
	}

	#define nodes_equal(src1, src2) \
	__nodes_equal(&(src1), &(src2), MAX_NUMNODES)
	static inline int __nodes_equal(const nodemask_t *src1p,
	const nodemask_t *src2p, int nbits)
	{
	return bitmap_equal(src1p->bits, src2p->bits, nbits);
	}

	#define nodes_intersects(src1, src2) \
	__nodes_intersects(&(src1), &(src2), MAX_NUMNODES)
	static inline int __nodes_intersects(const nodemask_t *src1p,
	const nodemask_t *src2p, int nbits)
	{
	return bitmap_intersects(src1p->bits, src2p->bits, nbits);
	}

	#define nodes_subset(src1, src2) \
	__nodes_subset(&(src1), &(src2), MAX_NUMNODES)
	static inline int __nodes_subset(const nodemask_t *src1p,
	const nodemask_t *src2p, int nbits)
	{
	return bitmap_subset(src1p->bits, src2p->bits, nbits);
	}

	#define nodes_empty(src) __nodes_empty(&(src), MAX_NUMNODES)
	static inline int __nodes_empty(const nodemask_t *srcp, int nbits)
	{
	return bitmap_empty(srcp->bits, nbits);
	}

	#define nodes_full(nodemask) __nodes_full(&(nodemask), MAX_NUMNODES)
	static inline int __nodes_full(const nodemask_t *srcp, int nbits)
	{
	return bitmap_full(srcp->bits, nbits);
	}

	#define nodes_weight(nodemask) __nodes_weight(&(nodemask), MAX_NUMNODES)
	static inline int __nodes_weight(const nodemask_t *srcp, int nbits)
	{
	return bitmap_weight(srcp->bits, nbits);
	}

	#define nodes_shift_right(dst, src, n) \
	__nodes_shift_right(&(dst), &(src), (n), MAX_NUMNODES)
	static inline void __nodes_shift_right(nodemask_t *dstp,
	const nodemask_t *srcp, int n, int nbits)
	{
	bitmap_shift_right(dstp->bits, srcp->bits, n, nbits);
	}

	#define nodes_shift_left(dst, src, n) \
	__nodes_shift_left(&(dst), &(src), (n), MAX_NUMNODES)
	static inline void __nodes_shift_left(nodemask_t *dstp,
	const nodemask_t *srcp, int n, int nbits)
	{
	bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
	}

	/* FIXME: better would be to fix all architectures to never return
	> MAX_NUMNODES, then the silly min_ts could be dropped. */

	#define first_node(src) __first_node(&(src))
	static inline int __first_node(const nodemask_t *srcp)
	{
	return min_t(int, MAX_NUMNODES, find_first_bit(srcp->bits, MAX_NUMNODES));
	}

	#define next_node(n, src) __next_node((n), &(src))
	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));
	}

	#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); \
	} \
	m; \
	})

	#define first_unset_node(mask) __first_unset_node(&(mask))
	static inline int __first_unset_node(const nodemask_t *maskp)
	{
	return min_t(int,MAX_NUMNODES,
	find_first_zero_bit(maskp->bits, MAX_NUMNODES));
	}

	#define NODE_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(MAX_NUMNODES)

	#if MAX_NUMNODES <= BITS_PER_LONG

	#define NODE_MASK_ALL \
	((nodemask_t) { { \
	[BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \
	} })

	#else

	#define NODE_MASK_ALL \
	((nodemask_t) { { \
	[0 ... BITS_TO_LONGS(MAX_NUMNODES)-2] = ~0UL, \
	[BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \
	} })

	#endif

	#define NODE_MASK_NONE \
	((nodemask_t) { { \
	[0 ... BITS_TO_LONGS(MAX_NUMNODES)-1] = 0UL \
	} })

	#define nodes_addr(src) ((src).bits)

	#define nodemask_scnprintf(buf, len, src) \
	__nodemask_scnprintf((buf), (len), &(src), MAX_NUMNODES)
	static inline int __nodemask_scnprintf(char *buf, int len,
	const nodemask_t *srcp, int nbits)
	{
	return bitmap_scnprintf(buf, len, srcp->bits, nbits);
	}

	#define nodemask_parse(ubuf, ulen, dst) \
	__nodemask_parse((ubuf), (ulen), &(dst), MAX_NUMNODES)
	static inline int __nodemask_parse(const char __user *buf, int len,
	nodemask_t *dstp, int nbits)
	{
	return bitmap_parse(buf, len, dstp->bits, nbits);
	}

	#define nodelist_scnprintf(buf, len, src) \
	__nodelist_scnprintf((buf), (len), &(src), MAX_NUMNODES)
	static inline int __nodelist_scnprintf(char *buf, int len,
	const nodemask_t *srcp, int nbits)
	{
	return bitmap_scnlistprintf(buf, len, srcp->bits, nbits);
	}

	#define nodelist_parse(buf, dst) __nodelist_parse((buf), &(dst), MAX_NUMNODES)
	static inline int __nodelist_parse(const char buf, nodemask_t dstp, int nbits)
	{
	return bitmap_parselist(buf, dstp->bits, nbits);
	}

	#define node_remap(oldbit, old, new) \
	__node_remap((oldbit), &(old), &(new), MAX_NUMNODES)
	static inline int __node_remap(int oldbit,
	const nodemask_t oldp, const nodemask_t newp, int nbits)
	{
	return bitmap_bitremap(oldbit, oldp->bits, newp->bits, nbits);
	}

	#define nodes_remap(dst, src, old, new) \
	__nodes_remap(&(dst), &(src), &(old), &(new), MAX_NUMNODES)
	static inline void __nodes_remap(nodemask_t dstp, const nodemask_t srcp,
	const nodemask_t oldp, const nodemask_t newp, int nbits)
	{
	bitmap_remap(dstp->bits, srcp->bits, oldp->bits, newp->bits, nbits);
	}

	#if MAX_NUMNODES > 1
	#define for_each_node_mask(node, mask) \
	for ((node) = first_node(mask); \
	(node) < MAX_NUMNODES; \
	(node) = next_node((node), (mask)))
	#else /* MAX_NUMNODES == 1 */
	#define for_each_node_mask(node, mask) \
	if (!nodes_empty(mask)) \
	for ((node) = 0; (node) < 1; (node)++)
	#endif /* MAX_NUMNODES */

	/*
	* The following particular system nodemasks and operations
	* on them manage all possible and online nodes.
	*/

	extern nodemask_t node_online_map;
	extern nodemask_t node_possible_map;

	#if MAX_NUMNODES > 1
	#define num_online_nodes() nodes_weight(node_online_map)
	#define num_possible_nodes() nodes_weight(node_possible_map)
	#define node_online(node) node_isset((node), node_online_map)
	#define node_possible(node) node_isset((node), node_possible_map)
	#define first_online_node first_node(node_online_map)
	#define next_online_node(nid) next_node((nid), node_online_map)
	int highest_possible_node_id(void);
	#else
	#define num_online_nodes() 1
	#define num_possible_nodes() 1
	#define node_online(node) ((node) == 0)
	#define node_possible(node) ((node) == 0)
	#define first_online_node 0
	#define next_online_node(nid) (MAX_NUMNODES)
	#define highest_possible_node_id() 0
	#endif

	#define any_online_node(mask) \
	({ \
	int node; \
	for_each_node_mask(node, (mask)) \
	if (node_online(node)) \
	break; \
	node; \
	})

	#define node_set_online(node) set_bit((node), node_online_map.bits)
	#define node_set_offline(node) clear_bit((node), node_online_map.bits)

	#define for_each_node(node) for_each_node_mask((node), node_possible_map)
	#define for_each_online_node(node) for_each_node_mask((node), node_online_map)

	#endif /* __LINUX_NODEMASK_H */