[deliverable/linux.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 */
};

/* 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 */

#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);
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 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)
{
}

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