[net-next-2.6.git] / include / linux / mempolicy.h

#ifndef _LINUX_MEMPOLICY_H
#define _LINUX_MEMPOLICY_H 1

#include <linux/errno.h>

/*
 * NUMA memory policies for Linux.
 * Copyright 2003,2004 Andi Kleen SuSE Labs
 */

/*
 * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
 * passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
 * The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
 */

/* Policies */
enum {
	MPOL_DEFAULT,
	MPOL_PREFERRED,
	MPOL_BIND,
	MPOL_INTERLEAVE,
	MPOL_MAX,	/* always last member of enum */
};

enum mpol_rebind_step {
	MPOL_REBIND_ONCE,	/* do rebind work at once(not by two step) */
	MPOL_REBIND_STEP1,	/* first step(set all the newly nodes) */
	MPOL_REBIND_STEP2,	/* second step(clean all the disallowed nodes)*/
	MPOL_REBIND_NSTEP,
};

/* Flags for set_mempolicy */
#define MPOL_F_STATIC_NODES	(1 << 15)
#define MPOL_F_RELATIVE_NODES	(1 << 14)

/*
 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
 * either set_mempolicy() or mbind().
 */
#define MPOL_MODE_FLAGS	(MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)

/* Flags for get_mempolicy */
#define MPOL_F_NODE	(1<<0)	/* return next IL mode instead of node mask */
#define MPOL_F_ADDR	(1<<1)	/* look up vma using address */
#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */

/* Flags for mbind */
#define MPOL_MF_STRICT	(1<<0)	/* Verify existing pages in the mapping */
#define MPOL_MF_MOVE	(1<<1)	/* Move pages owned by this process to conform to mapping */
#define MPOL_MF_MOVE_ALL (1<<2)	/* Move every page to conform to mapping */
#define MPOL_MF_INTERNAL (1<<3)	/* Internal flags start here */

/*
 * Internal flags that share the struct mempolicy flags word with
 * "mode flags".  These flags are allocated from bit 0 up, as they
 * are never OR'ed into the mode in mempolicy API arguments.
 */
#define MPOL_F_SHARED  (1 << 0)	/* identify shared policies */
#define MPOL_F_LOCAL   (1 << 1)	/* preferred local allocation */
#define MPOL_F_REBINDING (1 << 2)	/* identify policies in rebinding */

#ifdef __KERNEL__

#include <linux/mmzone.h>
#include <linux/slab.h>
#include <linux/rbtree.h>
#include <linux/spinlock.h>
#include <linux/nodemask.h>
#include <linux/pagemap.h>

struct mm_struct;

#ifdef CONFIG_NUMA

/*
 * Describe a memory policy.
 *
 * A mempolicy can be either associated with a process or with a VMA.
 * For VMA related allocations the VMA policy is preferred, otherwise
 * the process policy is used. Interrupts ignore the memory policy
 * of the current process.
 *
 * Locking policy for interlave:
 * In process context there is no locking because only the process accesses
 * its own state. All vma manipulation is somewhat protected by a down_read on
 * mmap_sem.
 *
 * Freeing policy:
 * Mempolicy objects are reference counted.  A mempolicy will be freed when
 * mpol_put() decrements the reference count to zero.
 *
 * Duplicating policy objects:
 * mpol_dup() allocates a new mempolicy and copies the specified mempolicy
 * to the new storage.  The reference count of the new object is initialized
 * to 1, representing the caller of mpol_dup().
 */
struct mempolicy {
	atomic_t refcnt;
	unsigned short mode; 	/* See MPOL_* above */
	unsigned short flags;	/* See set_mempolicy() MPOL_F_* above */
	union {
		short 		 preferred_node; /* preferred */
		nodemask_t	 nodes;		/* interleave/bind */
		/* undefined for default */
	} v;
	union {
		nodemask_t cpuset_mems_allowed;	/* relative to these nodes */
		nodemask_t user_nodemask;	/* nodemask passed by user */
	} w;
};

/*
 * Support for managing mempolicy data objects (clone, copy, destroy)
 * The default fast path of a NULL MPOL_DEFAULT policy is always inlined.
 */

extern void __mpol_put(struct mempolicy *pol);
static inline void mpol_put(struct mempolicy *pol)
{
	if (pol)
		__mpol_put(pol);
}

/*
 * Does mempolicy pol need explicit unref after use?
 * Currently only needed for shared policies.
 */
static inline int mpol_needs_cond_ref(struct mempolicy *pol)
{
	return (pol && (pol->flags & MPOL_F_SHARED));
}

static inline void mpol_cond_put(struct mempolicy *pol)
{
	if (mpol_needs_cond_ref(pol))
		__mpol_put(pol);
}

extern struct mempolicy *__mpol_cond_copy(struct mempolicy *tompol,
					  struct mempolicy *frompol);
static inline struct mempolicy *mpol_cond_copy(struct mempolicy *tompol,
						struct mempolicy *frompol)
{
	if (!frompol)
		return frompol;
	return __mpol_cond_copy(tompol, frompol);
}

extern struct mempolicy *__mpol_dup(struct mempolicy *pol);
static inline struct mempolicy *mpol_dup(struct mempolicy *pol)
{
	if (pol)
		pol = __mpol_dup(pol);
	return pol;
}

#define vma_policy(vma) ((vma)->vm_policy)
#define vma_set_policy(vma, pol) ((vma)->vm_policy = (pol))

static inline void mpol_get(struct mempolicy *pol)
{
	if (pol)
		atomic_inc(&pol->refcnt);
}

extern int __mpol_equal(struct mempolicy *a, struct mempolicy *b);
static inline int mpol_equal(struct mempolicy *a, struct mempolicy *b)
{
	if (a == b)
		return 1;
	return __mpol_equal(a, b);
}

/*
 * Tree of shared policies for a shared memory region.
 * Maintain the policies in a pseudo mm that contains vmas. The vmas
 * carry the policy. As a special twist the pseudo mm is indexed in pages, not
 * bytes, so that we can work with shared memory segments bigger than
 * unsigned long.
 */

struct sp_node {
	struct rb_node nd;
	unsigned long start, end;
	struct mempolicy *policy;
};

struct shared_policy {
	struct rb_root root;
	spinlock_t lock;
};

void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol);
int mpol_set_shared_policy(struct shared_policy *info,
				struct vm_area_struct *vma,
				struct mempolicy *new);
void mpol_free_shared_policy(struct shared_policy *p);
struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp,
					    unsigned long idx);

extern void numa_default_policy(void);
extern void numa_policy_init(void);
extern void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new,
				enum mpol_rebind_step step);
extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
extern void mpol_fix_fork_child_flag(struct task_struct *p);

extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
				unsigned long addr, gfp_t gfp_flags,
				struct mempolicy **mpol, nodemask_t **nodemask);
extern bool init_nodemask_of_mempolicy(nodemask_t *mask);
extern bool mempolicy_nodemask_intersects(struct task_struct *tsk,
				const nodemask_t *mask);
extern unsigned slab_node(struct mempolicy *policy);

extern enum zone_type policy_zone;

static inline void check_highest_zone(enum zone_type k)
{
	if (k > policy_zone && k != ZONE_MOVABLE)
		policy_zone = k;
}

int do_migrate_pages(struct mm_struct *mm,
	const nodemask_t *from_nodes, const nodemask_t *to_nodes, int flags);


#ifdef CONFIG_TMPFS
extern int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context);

extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol,
			int no_context);
#endif

/* Check if a vma is migratable */
static inline int vma_migratable(struct vm_area_struct *vma)
{
	if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
		return 0;
	/*
	 * Migration allocates pages in the highest zone. If we cannot
	 * do so then migration (at least from node to node) is not
	 * possible.
	 */
	if (vma->vm_file &&
		gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping))
								< policy_zone)
			return 0;
	return 1;
}

#else

struct mempolicy {};

static inline int mpol_equal(struct mempolicy *a, struct mempolicy *b)
{
	return 1;
}

static inline void mpol_put(struct mempolicy *p)
{
}

static inline void mpol_cond_put(struct mempolicy *pol)
{
}

static inline struct mempolicy *mpol_cond_copy(struct mempolicy *to,
						struct mempolicy *from)
{
	return from;
}

static inline void mpol_get(struct mempolicy *pol)
{
}

static inline struct mempolicy *mpol_dup(struct mempolicy *old)
{
	return NULL;
}

struct shared_policy {};

static inline int mpol_set_shared_policy(struct shared_policy *info,
					struct vm_area_struct *vma,
					struct mempolicy *new)
{
	return -EINVAL;
}

static inline void mpol_shared_policy_init(struct shared_policy *sp,
						struct mempolicy *mpol)
{
}

static inline void mpol_free_shared_policy(struct shared_policy *p)
{
}

static inline struct mempolicy *
mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx)
{
	return NULL;
}

#define vma_policy(vma) NULL
#define vma_set_policy(vma, pol) do {} while(0)

static inline void numa_policy_init(void)
{
}

static inline void numa_default_policy(void)
{
}

static inline void mpol_rebind_task(struct task_struct *tsk,
				const nodemask_t *new,
				enum mpol_rebind_step step)
{
}

static inline void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new)
{
}

static inline void mpol_fix_fork_child_flag(struct task_struct *p)
{
}

static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
				unsigned long addr, gfp_t gfp_flags,
				struct mempolicy **mpol, nodemask_t **nodemask)
{
	*mpol = NULL;
	*nodemask = NULL;
	return node_zonelist(0, gfp_flags);
}

static inline bool init_nodemask_of_mempolicy(nodemask_t *m)
{
	return false;
}

static inline bool mempolicy_nodemask_intersects(struct task_struct *tsk,
			const nodemask_t *mask)
{
	return false;
}

static inline int do_migrate_pages(struct mm_struct *mm,
			const nodemask_t *from_nodes,
			const nodemask_t *to_nodes, int flags)
{
	return 0;
}

static inline void check_highest_zone(int k)
{
}

#ifdef CONFIG_TMPFS
static inline int mpol_parse_str(char *str, struct mempolicy **mpol,
				int no_context)
{
	return 1;	/* error */
}

static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol,
				int no_context)
{
	return 0;
}
#endif

#endif /* CONFIG_NUMA */
#endif /* __KERNEL__ */

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_MEMPOLICY_H
	2	#define _LINUX_MEMPOLICY_H 1
	3
	4	#include <linux/errno.h>
	5
	6	/*
	7	* NUMA memory policies for Linux.
	8	* Copyright 2003,2004 Andi Kleen SuSE Labs
	9	*/
	10
028fec41 DR	11	/*
	12	* Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
	13	* passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
	14	* The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
	15	*/
	16
1da177e4	17	/* Policies */
a3b51e01 DR	18	enum {
	19	MPOL_DEFAULT,
	20	MPOL_PREFERRED,
	21	MPOL_BIND,
	22	MPOL_INTERLEAVE,
	23	MPOL_MAX, /* always last member of enum */
	24	};
1da177e4	25
708c1bbc MX	26	enum mpol_rebind_step {
	27	MPOL_REBIND_ONCE, /* do rebind work at once(not by two step) */
	28	MPOL_REBIND_STEP1, /* first step(set all the newly nodes) */
	29	MPOL_REBIND_STEP2, /* second step(clean all the disallowed nodes)*/
	30	MPOL_REBIND_NSTEP,
	31	};
	32
028fec41	33	/* Flags for set_mempolicy */
f5b087b5	34	#define MPOL_F_STATIC_NODES (1 << 15)
4c50bc01	35	#define MPOL_F_RELATIVE_NODES (1 << 14)
f5b087b5	36
028fec41 DR	37	/*
	38	* MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
	39	* either set_mempolicy() or mbind().
	40	*/
4c50bc01	41	#define MPOL_MODE_FLAGS (MPOL_F_STATIC_NODES \| MPOL_F_RELATIVE_NODES)
028fec41 DR	42
028fec41 DR	43	/* Flags for get_mempolicy */
1da177e4 LT	44	#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
1da177e4 LT	45	#define MPOL_F_ADDR (1<<1) /* look up vma using address */
754af6f5	46	#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
1da177e4 LT	47
	48	/* Flags for mbind */
	49	#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
dc9aa5b9 CL	50	#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform to mapping */
	51	#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to mapping */
	52	#define MPOL_MF_INTERNAL (1<<3) /* Internal flags start here */
1da177e4	53
aab0b102 LS	54	/*
	55	* Internal flags that share the struct mempolicy flags word with
	56	* "mode flags". These flags are allocated from bit 0 up, as they
	57	* are never OR'ed into the mode in mempolicy API arguments.
	58	*/
	59	#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
fc36b8d3	60	#define MPOL_F_LOCAL (1 << 1) /* preferred local allocation */
708c1bbc	61	#define MPOL_F_REBINDING (1 << 2) /* identify policies in rebinding */
aab0b102	62
1da177e4 LT	63	#ifdef __KERNEL__
1da177e4 LT	64
1da177e4	65	#include <linux/mmzone.h>
1da177e4 LT	66	#include <linux/slab.h>
	67	#include <linux/rbtree.h>
	68	#include <linux/spinlock.h>
dfcd3c0d	69	#include <linux/nodemask.h>
83d1674a	70	#include <linux/pagemap.h>
1da177e4	71
45b35a5c	72	struct mm_struct;
1da177e4 LT	73
	74	#ifdef CONFIG_NUMA
	75
	76	/*
	77	* Describe a memory policy.
	78	*
	79	* A mempolicy can be either associated with a process or with a VMA.
	80	* For VMA related allocations the VMA policy is preferred, otherwise
	81	* the process policy is used. Interrupts ignore the memory policy
	82	* of the current process.
	83	*
	84	* Locking policy for interlave:
	85	* In process context there is no locking because only the process accesses
	86	* its own state. All vma manipulation is somewhat protected by a down_read on
b8072f09	87	* mmap_sem.
1da177e4 LT	88	*
1da177e4 LT	89	* Freeing policy:
19770b32	90	* Mempolicy objects are reference counted. A mempolicy will be freed when
f0be3d32	91	* mpol_put() decrements the reference count to zero.
1da177e4	92	*
846a16bf LS	93	* Duplicating policy objects:
846a16bf LS	94	* mpol_dup() allocates a new mempolicy and copies the specified mempolicy
19770b32	95	* to the new storage. The reference count of the new object is initialized
846a16bf	96	* to 1, representing the caller of mpol_dup().
1da177e4 LT	97	*/
	98	struct mempolicy {
	99	atomic_t refcnt;
45c4745a	100	unsigned short mode; /* See MPOL_* above */
028fec41	101	unsigned short flags; /* See set_mempolicy() MPOL_F_* above */
1da177e4	102	union {
1da177e4	103	short preferred_node; /* preferred */
19770b32	104	nodemask_t nodes; /* interleave/bind */
1da177e4 LT	105	/* undefined for default */
1da177e4 LT	106	} v;
f5b087b5 DR	107	union {
	108	nodemask_t cpuset_mems_allowed; /* relative to these nodes */
	109	nodemask_t user_nodemask; /* nodemask passed by user */
	110	} w;
1da177e4 LT	111	};
	112
	113	/*
	114	* Support for managing mempolicy data objects (clone, copy, destroy)
	115	* The default fast path of a NULL MPOL_DEFAULT policy is always inlined.
	116	*/
	117
f0be3d32 LS	118	extern void __mpol_put(struct mempolicy *pol);
f0be3d32 LS	119	static inline void mpol_put(struct mempolicy *pol)
1da177e4 LT	120	{
1da177e4 LT	121	if (pol)
f0be3d32	122	__mpol_put(pol);
1da177e4 LT	123	}
1da177e4 LT	124
52cd3b07 LS	125	/*
	126	* Does mempolicy pol need explicit unref after use?
	127	* Currently only needed for shared policies.
	128	*/
	129	static inline int mpol_needs_cond_ref(struct mempolicy *pol)
	130	{
	131	return (pol && (pol->flags & MPOL_F_SHARED));
	132	}
	133
	134	static inline void mpol_cond_put(struct mempolicy *pol)
	135	{
	136	if (mpol_needs_cond_ref(pol))
	137	__mpol_put(pol);
	138	}
	139
	140	extern struct mempolicy __mpol_cond_copy(struct mempolicy tompol,
	141	struct mempolicy *frompol);
	142	static inline struct mempolicy mpol_cond_copy(struct mempolicy tompol,
	143	struct mempolicy *frompol)
	144	{
	145	if (!frompol)
	146	return frompol;
	147	return __mpol_cond_copy(tompol, frompol);
	148	}
	149
846a16bf LS	150	extern struct mempolicy __mpol_dup(struct mempolicy pol);
846a16bf LS	151	static inline struct mempolicy mpol_dup(struct mempolicy pol)
1da177e4 LT	152	{
1da177e4 LT	153	if (pol)
846a16bf	154	pol = __mpol_dup(pol);
1da177e4 LT	155	return pol;
	156	}
	157
	158	#define vma_policy(vma) ((vma)->vm_policy)
	159	#define vma_set_policy(vma, pol) ((vma)->vm_policy = (pol))
	160
	161	static inline void mpol_get(struct mempolicy *pol)
	162	{
	163	if (pol)
	164	atomic_inc(&pol->refcnt);
	165	}
	166
	167	extern int __mpol_equal(struct mempolicy a, struct mempolicy b);
	168	static inline int mpol_equal(struct mempolicy a, struct mempolicy b)
	169	{
	170	if (a == b)
	171	return 1;
	172	return __mpol_equal(a, b);
	173	}
1da177e4	174
1da177e4 LT	175	/*
	176	* Tree of shared policies for a shared memory region.
	177	* Maintain the policies in a pseudo mm that contains vmas. The vmas
	178	* carry the policy. As a special twist the pseudo mm is indexed in pages, not
	179	* bytes, so that we can work with shared memory segments bigger than
	180	* unsigned long.
	181	*/
	182
	183	struct sp_node {
	184	struct rb_node nd;
	185	unsigned long start, end;
	186	struct mempolicy *policy;
	187	};
	188
	189	struct shared_policy {
	190	struct rb_root root;
	191	spinlock_t lock;
	192	};
	193
71fe804b	194	void mpol_shared_policy_init(struct shared_policy sp, struct mempolicy mpol);
1da177e4 LT	195	int mpol_set_shared_policy(struct shared_policy *info,
	196	struct vm_area_struct *vma,
	197	struct mempolicy *new);
	198	void mpol_free_shared_policy(struct shared_policy *p);
	199	struct mempolicy mpol_shared_policy_lookup(struct shared_policy sp,
	200	unsigned long idx);
	201
	202	extern void numa_default_policy(void);
	203	extern void numa_policy_init(void);
708c1bbc MX	204	extern void mpol_rebind_task(struct task_struct tsk, const nodemask_t new,
708c1bbc MX	205	enum mpol_rebind_step step);
4225399a	206	extern void mpol_rebind_mm(struct mm_struct mm, nodemask_t new);
c61afb18	207	extern void mpol_fix_fork_child_flag(struct task_struct *p);
4225399a	208
5da7ca86	209	extern struct zonelist huge_zonelist(struct vm_area_struct vma,
19770b32 MG	210	unsigned long addr, gfp_t gfp_flags,
19770b32 MG	211	struct mempolicy mpol, nodemask_t nodemask);
06808b08	212	extern bool init_nodemask_of_mempolicy(nodemask_t *mask);
6f48d0eb DR	213	extern bool mempolicy_nodemask_intersects(struct task_struct *tsk,
6f48d0eb DR	214	const nodemask_t *mask);
dc85da15	215	extern unsigned slab_node(struct mempolicy *policy);
1da177e4	216
2f6726e5	217	extern enum zone_type policy_zone;
4be38e35	218
2f6726e5	219	static inline void check_highest_zone(enum zone_type k)
4be38e35	220	{
b377fd39	221	if (k > policy_zone && k != ZONE_MOVABLE)
4be38e35 CL	222	policy_zone = k;
	223	}
	224
39743889 CL	225	int do_migrate_pages(struct mm_struct *mm,
	226	const nodemask_t from_nodes, const nodemask_t to_nodes, int flags);
	227
095f1fc4 LS	228
095f1fc4 LS	229	#ifdef CONFIG_TMPFS
71fe804b	230	extern int mpol_parse_str(char str, struct mempolicy *mpol, int no_context);
095f1fc4	231
71fe804b LS	232	extern int mpol_to_str(char buffer, int maxlen, struct mempolicy pol,
71fe804b LS	233	int no_context);
095f1fc4	234	#endif
83d1674a GS	235
	236	/* Check if a vma is migratable */
	237	static inline int vma_migratable(struct vm_area_struct *vma)
	238	{
	239	if (vma->vm_flags & (VM_IO\|VM_HUGETLB\|VM_PFNMAP\|VM_RESERVED))
	240	return 0;
	241	/*
	242	* Migration allocates pages in the highest zone. If we cannot
	243	* do so then migration (at least from node to node) is not
	244	* possible.
	245	*/
	246	if (vma->vm_file &&
	247	gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping))
	248	< policy_zone)
	249	return 0;
	250	return 1;
	251	}
	252
1da177e4 LT	253	#else
	254
	255	struct mempolicy {};
	256
	257	static inline int mpol_equal(struct mempolicy a, struct mempolicy b)
	258	{
	259	return 1;
	260	}
1da177e4	261
f0be3d32	262	static inline void mpol_put(struct mempolicy *p)
1da177e4 LT	263	{
	264	}
	265
52cd3b07 LS	266	static inline void mpol_cond_put(struct mempolicy *pol)
	267	{
	268	}
	269
	270	static inline struct mempolicy mpol_cond_copy(struct mempolicy to,
	271	struct mempolicy *from)
	272	{
	273	return from;
	274	}
	275
1da177e4 LT	276	static inline void mpol_get(struct mempolicy *pol)
	277	{
	278	}
	279
846a16bf	280	static inline struct mempolicy mpol_dup(struct mempolicy old)
1da177e4 LT	281	{
	282	return NULL;
	283	}
	284
1da177e4 LT	285	struct shared_policy {};
	286
	287	static inline int mpol_set_shared_policy(struct shared_policy *info,
	288	struct vm_area_struct *vma,
	289	struct mempolicy *new)
	290	{
	291	return -EINVAL;
	292	}
	293
71fe804b LS	294	static inline void mpol_shared_policy_init(struct shared_policy *sp,
71fe804b LS	295	struct mempolicy *mpol)
1da177e4 LT	296	{
	297	}
	298
	299	static inline void mpol_free_shared_policy(struct shared_policy *p)
	300	{
	301	}
	302
	303	static inline struct mempolicy *
	304	mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx)
	305	{
	306	return NULL;
	307	}
	308
	309	#define vma_policy(vma) NULL
	310	#define vma_set_policy(vma, pol) do {} while(0)
	311
	312	static inline void numa_policy_init(void)
	313	{
	314	}
	315
	316	static inline void numa_default_policy(void)
	317	{
	318	}
	319
74cb2155	320	static inline void mpol_rebind_task(struct task_struct *tsk,
708c1bbc MX	321	const nodemask_t *new,
708c1bbc MX	322	enum mpol_rebind_step step)
68860ec1 PJ	323	{
	324	}
	325
4225399a PJ	326	static inline void mpol_rebind_mm(struct mm_struct mm, nodemask_t new)
	327	{
	328	}
	329
c61afb18 PJ	330	static inline void mpol_fix_fork_child_flag(struct task_struct *p)
	331	{
	332	}
	333
5da7ca86	334	static inline struct zonelist huge_zonelist(struct vm_area_struct vma,
19770b32 MG	335	unsigned long addr, gfp_t gfp_flags,
19770b32 MG	336	struct mempolicy mpol, nodemask_t nodemask)
5da7ca86	337	{
19770b32 MG	338	*mpol = NULL;
19770b32 MG	339	*nodemask = NULL;
0e88460d	340	return node_zonelist(0, gfp_flags);
5da7ca86 CL	341	}
5da7ca86 CL	342
6f48d0eb DR	343	static inline bool init_nodemask_of_mempolicy(nodemask_t *m)
	344	{
	345	return false;
	346	}
	347
	348	static inline bool mempolicy_nodemask_intersects(struct task_struct *tsk,
	349	const nodemask_t *mask)
	350	{
	351	return false;
	352	}
06808b08	353
45b07ef3 PJ	354	static inline int do_migrate_pages(struct mm_struct *mm,
	355	const nodemask_t *from_nodes,
	356	const nodemask_t *to_nodes, int flags)
	357	{
	358	return 0;
	359	}
	360
4be38e35 CL	361	static inline void check_highest_zone(int k)
	362	{
	363	}
095f1fc4 LS	364
095f1fc4 LS	365	#ifdef CONFIG_TMPFS
71fe804b LS	366	static inline int mpol_parse_str(char str, struct mempolicy *mpol,
71fe804b LS	367	int no_context)
095f1fc4	368	{
71fe804b	369	return 1; /* error */
095f1fc4 LS	370	}
095f1fc4 LS	371
71fe804b LS	372	static inline int mpol_to_str(char buffer, int maxlen, struct mempolicy pol,
71fe804b LS	373	int no_context)
095f1fc4 LS	374	{
	375	return 0;
	376	}
	377	#endif
	378
1da177e4 LT	379	#endif /* CONFIG_NUMA */
	380	#endif /* __KERNEL__ */
	381
	382	#endif