6031c68de4
layer, but it is read directly by the MI VM layer. This change introduces pmap_page_is_write_mapped() in order to completely encapsulate all direct access to PGA_WRITEABLE in the pmap layer. Aesthetics aside, I am making this change because amd64 will likely begin using an alternative method to track write mappings, and having pmap_page_is_write_mapped() in place allows me to make such a change without further modification to the MI VM layer. As an added bonus, tidy up some nearby comments concerning page flags. Reviewed by: kib MFC after: 6 weeks
467 lines
16 KiB
C
467 lines
16 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* The Mach Operating System project at Carnegie-Mellon University.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)vm_page.h 8.2 (Berkeley) 12/13/93
|
|
*
|
|
*
|
|
* Copyright (c) 1987, 1990 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Authors: Avadis Tevanian, Jr., Michael Wayne Young
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Resident memory system definitions.
|
|
*/
|
|
|
|
#ifndef _VM_PAGE_
|
|
#define _VM_PAGE_
|
|
|
|
#include <vm/pmap.h>
|
|
|
|
/*
|
|
* Management of resident (logical) pages.
|
|
*
|
|
* A small structure is kept for each resident
|
|
* page, indexed by page number. Each structure
|
|
* is an element of several lists:
|
|
*
|
|
* A hash table bucket used to quickly
|
|
* perform object/offset lookups
|
|
*
|
|
* A list of all pages for a given object,
|
|
* so they can be quickly deactivated at
|
|
* time of deallocation.
|
|
*
|
|
* An ordered list of pages due for pageout.
|
|
*
|
|
* In addition, the structure contains the object
|
|
* and offset to which this page belongs (for pageout),
|
|
* and sundry status bits.
|
|
*
|
|
* In general, operations on this structure's mutable fields are
|
|
* synchronized using either one of or a combination of the lock on the
|
|
* object that the page belongs to (O), the pool lock for the page (P),
|
|
* or the lock for either the free or paging queues (Q). If a field is
|
|
* annotated below with two of these locks, then holding either lock is
|
|
* sufficient for read access, but both locks are required for write
|
|
* access.
|
|
*
|
|
* In contrast, the synchronization of accesses to the page's
|
|
* dirty field is machine dependent (M). In the
|
|
* machine-independent layer, the lock on the object that the
|
|
* page belongs to must be held in order to operate on the field.
|
|
* However, the pmap layer is permitted to set all bits within
|
|
* the field without holding that lock. If the underlying
|
|
* architecture does not support atomic read-modify-write
|
|
* operations on the field's type, then the machine-independent
|
|
* layer uses a 32-bit atomic on the aligned 32-bit word that
|
|
* contains the dirty field. In the machine-independent layer,
|
|
* the implementation of read-modify-write operations on the
|
|
* field is encapsulated in vm_page_clear_dirty_mask().
|
|
*/
|
|
|
|
TAILQ_HEAD(pglist, vm_page);
|
|
|
|
#if PAGE_SIZE == 4096
|
|
#define VM_PAGE_BITS_ALL 0xffu
|
|
typedef uint8_t vm_page_bits_t;
|
|
#elif PAGE_SIZE == 8192
|
|
#define VM_PAGE_BITS_ALL 0xffffu
|
|
typedef uint16_t vm_page_bits_t;
|
|
#elif PAGE_SIZE == 16384
|
|
#define VM_PAGE_BITS_ALL 0xffffffffu
|
|
typedef uint32_t vm_page_bits_t;
|
|
#elif PAGE_SIZE == 32768
|
|
#define VM_PAGE_BITS_ALL 0xfffffffffffffffflu
|
|
typedef uint64_t vm_page_bits_t;
|
|
#endif
|
|
|
|
struct vm_page {
|
|
TAILQ_ENTRY(vm_page) pageq; /* queue info for FIFO queue or free list (Q) */
|
|
TAILQ_ENTRY(vm_page) listq; /* pages in same object (O) */
|
|
struct vm_page *left; /* splay tree link (O) */
|
|
struct vm_page *right; /* splay tree link (O) */
|
|
|
|
vm_object_t object; /* which object am I in (O,P)*/
|
|
vm_pindex_t pindex; /* offset into object (O,P) */
|
|
vm_paddr_t phys_addr; /* physical address of page */
|
|
struct md_page md; /* machine dependant stuff */
|
|
uint8_t queue; /* page queue index (P,Q) */
|
|
int8_t segind;
|
|
short hold_count; /* page hold count (P) */
|
|
uint8_t order; /* index of the buddy queue */
|
|
uint8_t pool;
|
|
u_short cow; /* page cow mapping count (P) */
|
|
u_int wire_count; /* wired down maps refs (P) */
|
|
uint8_t aflags; /* access is atomic */
|
|
uint8_t flags; /* see below, often immutable after alloc */
|
|
u_short oflags; /* page flags (O) */
|
|
u_char act_count; /* page usage count (O) */
|
|
u_char busy; /* page busy count (O) */
|
|
/* NOTE that these must support one bit per DEV_BSIZE in a page!!! */
|
|
/* so, on normal X86 kernels, they must be at least 8 bits wide */
|
|
vm_page_bits_t valid; /* map of valid DEV_BSIZE chunks (O) */
|
|
vm_page_bits_t dirty; /* map of dirty DEV_BSIZE chunks (M) */
|
|
};
|
|
|
|
/*
|
|
* Page flags stored in oflags:
|
|
*
|
|
* Access to these page flags is synchronized by the lock on the object
|
|
* containing the page (O).
|
|
*
|
|
* Note: VPO_UNMANAGED (used by OBJT_DEVICE, OBJT_PHYS and OBJT_SG)
|
|
* indicates that the page is not under PV management but
|
|
* otherwise should be treated as a normal page. Pages not
|
|
* under PV management cannot be paged out via the
|
|
* object/vm_page_t because there is no knowledge of their pte
|
|
* mappings, and such pages are also not on any PQ queue.
|
|
*
|
|
*/
|
|
#define VPO_BUSY 0x0001 /* page is in transit */
|
|
#define VPO_WANTED 0x0002 /* someone is waiting for page */
|
|
#define VPO_UNMANAGED 0x0004 /* No PV management for page */
|
|
#define VPO_SWAPINPROG 0x0200 /* swap I/O in progress on page */
|
|
#define VPO_NOSYNC 0x0400 /* do not collect for syncer */
|
|
|
|
#define PQ_NONE 255
|
|
#define PQ_INACTIVE 0
|
|
#define PQ_ACTIVE 1
|
|
#define PQ_HOLD 2
|
|
#define PQ_COUNT 3
|
|
|
|
struct vpgqueues {
|
|
struct pglist pl;
|
|
int *cnt;
|
|
};
|
|
|
|
extern struct vpgqueues vm_page_queues[PQ_COUNT];
|
|
|
|
struct vpglocks {
|
|
struct mtx data;
|
|
char pad[CACHE_LINE_SIZE - sizeof(struct mtx)];
|
|
} __aligned(CACHE_LINE_SIZE);
|
|
|
|
extern struct vpglocks vm_page_queue_free_lock;
|
|
extern struct vpglocks pa_lock[];
|
|
|
|
#if defined(__arm__)
|
|
#define PDRSHIFT PDR_SHIFT
|
|
#elif !defined(PDRSHIFT)
|
|
#define PDRSHIFT 21
|
|
#endif
|
|
|
|
#define pa_index(pa) ((pa) >> PDRSHIFT)
|
|
#define PA_LOCKPTR(pa) &pa_lock[pa_index((pa)) % PA_LOCK_COUNT].data
|
|
#define PA_LOCKOBJPTR(pa) ((struct lock_object *)PA_LOCKPTR((pa)))
|
|
#define PA_LOCK(pa) mtx_lock(PA_LOCKPTR(pa))
|
|
#define PA_TRYLOCK(pa) mtx_trylock(PA_LOCKPTR(pa))
|
|
#define PA_UNLOCK(pa) mtx_unlock(PA_LOCKPTR(pa))
|
|
#define PA_UNLOCK_COND(pa) \
|
|
do { \
|
|
if ((pa) != 0) { \
|
|
PA_UNLOCK((pa)); \
|
|
(pa) = 0; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define PA_LOCK_ASSERT(pa, a) mtx_assert(PA_LOCKPTR(pa), (a))
|
|
|
|
#ifdef KLD_MODULE
|
|
#define vm_page_lock(m) vm_page_lock_KBI((m), LOCK_FILE, LOCK_LINE)
|
|
#define vm_page_unlock(m) vm_page_unlock_KBI((m), LOCK_FILE, LOCK_LINE)
|
|
#define vm_page_trylock(m) vm_page_trylock_KBI((m), LOCK_FILE, LOCK_LINE)
|
|
#if defined(INVARIANTS)
|
|
#define vm_page_lock_assert(m, a) \
|
|
vm_page_lock_assert_KBI((m), (a), __FILE__, __LINE__)
|
|
#else
|
|
#define vm_page_lock_assert(m, a)
|
|
#endif
|
|
#else /* !KLD_MODULE */
|
|
#define vm_page_lockptr(m) (PA_LOCKPTR(VM_PAGE_TO_PHYS((m))))
|
|
#define vm_page_lock(m) mtx_lock(vm_page_lockptr((m)))
|
|
#define vm_page_unlock(m) mtx_unlock(vm_page_lockptr((m)))
|
|
#define vm_page_trylock(m) mtx_trylock(vm_page_lockptr((m)))
|
|
#define vm_page_lock_assert(m, a) mtx_assert(vm_page_lockptr((m)), (a))
|
|
#endif
|
|
|
|
#define vm_page_queue_free_mtx vm_page_queue_free_lock.data
|
|
|
|
/*
|
|
* These are the flags defined for vm_page.
|
|
*
|
|
* aflags are updated by atomic accesses. Use the vm_page_aflag_set()
|
|
* and vm_page_aflag_clear() functions to set and clear the flags.
|
|
*
|
|
* PGA_REFERENCED may be cleared only if the object containing the page is
|
|
* locked. It is set by both the MI and MD VM layers.
|
|
*
|
|
* PGA_WRITEABLE is set exclusively on managed pages by pmap_enter(). When it
|
|
* does so, the page must be VPO_BUSY. The MI VM layer must never access this
|
|
* flag directly. Instead, it should call pmap_page_is_write_mapped().
|
|
*
|
|
* PGA_EXECUTABLE may be set by pmap routines, and indicates that a page has
|
|
* at least one executable mapping. It is not consumed by the MI VM layer.
|
|
*/
|
|
#define PGA_WRITEABLE 0x01 /* page may be mapped writeable */
|
|
#define PGA_REFERENCED 0x02 /* page has been referenced */
|
|
#define PGA_EXECUTABLE 0x04 /* page may be mapped executable */
|
|
|
|
/*
|
|
* Page flags. If changed at any other time than page allocation or
|
|
* freeing, the modification must be protected by the vm_page lock.
|
|
*/
|
|
#define PG_CACHED 0x01 /* page is cached */
|
|
#define PG_FREE 0x02 /* page is free */
|
|
#define PG_FICTITIOUS 0x04 /* physical page doesn't exist */
|
|
#define PG_ZERO 0x08 /* page is zeroed */
|
|
#define PG_MARKER 0x10 /* special queue marker page */
|
|
#define PG_SLAB 0x20 /* object pointer is actually a slab */
|
|
#define PG_WINATCFLS 0x40 /* flush dirty page on inactive q */
|
|
#define PG_NODUMP 0x80 /* don't include this page in a dump */
|
|
|
|
/*
|
|
* Misc constants.
|
|
*/
|
|
#define ACT_DECLINE 1
|
|
#define ACT_ADVANCE 3
|
|
#define ACT_INIT 5
|
|
#define ACT_MAX 64
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#include <vm/vm_param.h>
|
|
|
|
/*
|
|
* Each pageable resident page falls into one of five lists:
|
|
*
|
|
* free
|
|
* Available for allocation now.
|
|
*
|
|
* cache
|
|
* Almost available for allocation. Still associated with
|
|
* an object, but clean and immediately freeable.
|
|
*
|
|
* hold
|
|
* Will become free after a pending I/O operation
|
|
* completes.
|
|
*
|
|
* The following lists are LRU sorted:
|
|
*
|
|
* inactive
|
|
* Low activity, candidates for reclamation.
|
|
* This is the list of pages that should be
|
|
* paged out next.
|
|
*
|
|
* active
|
|
* Pages that are "active" i.e. they have been
|
|
* recently referenced.
|
|
*
|
|
*/
|
|
|
|
struct vnode;
|
|
extern int vm_page_zero_count;
|
|
|
|
extern vm_page_t vm_page_array; /* First resident page in table */
|
|
extern long vm_page_array_size; /* number of vm_page_t's */
|
|
extern long first_page; /* first physical page number */
|
|
|
|
#define VM_PAGE_IS_FREE(m) (((m)->flags & PG_FREE) != 0)
|
|
|
|
#define VM_PAGE_TO_PHYS(entry) ((entry)->phys_addr)
|
|
|
|
vm_page_t vm_phys_paddr_to_vm_page(vm_paddr_t pa);
|
|
|
|
vm_page_t PHYS_TO_VM_PAGE(vm_paddr_t pa);
|
|
|
|
extern struct vpglocks vm_page_queue_lock;
|
|
|
|
#define vm_page_queue_mtx vm_page_queue_lock.data
|
|
#define vm_page_lock_queues() mtx_lock(&vm_page_queue_mtx)
|
|
#define vm_page_unlock_queues() mtx_unlock(&vm_page_queue_mtx)
|
|
|
|
/* page allocation classes: */
|
|
#define VM_ALLOC_NORMAL 0
|
|
#define VM_ALLOC_INTERRUPT 1
|
|
#define VM_ALLOC_SYSTEM 2
|
|
#define VM_ALLOC_CLASS_MASK 3
|
|
/* page allocation flags: */
|
|
#define VM_ALLOC_WIRED 0x0020 /* non pageable */
|
|
#define VM_ALLOC_ZERO 0x0040 /* Try to obtain a zeroed page */
|
|
#define VM_ALLOC_RETRY 0x0080 /* Mandatory with vm_page_grab() */
|
|
#define VM_ALLOC_NOOBJ 0x0100 /* No associated object */
|
|
#define VM_ALLOC_NOBUSY 0x0200 /* Do not busy the page */
|
|
#define VM_ALLOC_IFCACHED 0x0400 /* Fail if the page is not cached */
|
|
#define VM_ALLOC_IFNOTCACHED 0x0800 /* Fail if the page is cached */
|
|
#define VM_ALLOC_IGN_SBUSY 0x1000 /* vm_page_grab() only */
|
|
#define VM_ALLOC_NODUMP 0x2000 /* don't include in dump */
|
|
|
|
#define VM_ALLOC_COUNT_SHIFT 16
|
|
#define VM_ALLOC_COUNT(count) ((count) << VM_ALLOC_COUNT_SHIFT)
|
|
|
|
void vm_page_aflag_set(vm_page_t m, uint8_t bits);
|
|
void vm_page_aflag_clear(vm_page_t m, uint8_t bits);
|
|
void vm_page_busy(vm_page_t m);
|
|
void vm_page_flash(vm_page_t m);
|
|
void vm_page_io_start(vm_page_t m);
|
|
void vm_page_io_finish(vm_page_t m);
|
|
void vm_page_hold(vm_page_t mem);
|
|
void vm_page_unhold(vm_page_t mem);
|
|
void vm_page_free(vm_page_t m);
|
|
void vm_page_free_zero(vm_page_t m);
|
|
void vm_page_dirty(vm_page_t m);
|
|
void vm_page_wakeup(vm_page_t m);
|
|
|
|
void vm_pageq_remove(vm_page_t m);
|
|
|
|
void vm_page_activate (vm_page_t);
|
|
vm_page_t vm_page_alloc (vm_object_t, vm_pindex_t, int);
|
|
vm_page_t vm_page_alloc_contig(vm_object_t object, vm_pindex_t pindex, int req,
|
|
u_long npages, vm_paddr_t low, vm_paddr_t high, u_long alignment,
|
|
vm_paddr_t boundary, vm_memattr_t memattr);
|
|
vm_page_t vm_page_alloc_freelist(int, int);
|
|
vm_page_t vm_page_grab (vm_object_t, vm_pindex_t, int);
|
|
void vm_page_cache(vm_page_t);
|
|
void vm_page_cache_free(vm_object_t, vm_pindex_t, vm_pindex_t);
|
|
void vm_page_cache_transfer(vm_object_t, vm_pindex_t, vm_object_t);
|
|
int vm_page_try_to_cache (vm_page_t);
|
|
int vm_page_try_to_free (vm_page_t);
|
|
void vm_page_dontneed(vm_page_t);
|
|
void vm_page_deactivate (vm_page_t);
|
|
vm_page_t vm_page_find_least(vm_object_t, vm_pindex_t);
|
|
vm_page_t vm_page_getfake(vm_paddr_t paddr, vm_memattr_t memattr);
|
|
void vm_page_initfake(vm_page_t m, vm_paddr_t paddr, vm_memattr_t memattr);
|
|
void vm_page_insert (vm_page_t, vm_object_t, vm_pindex_t);
|
|
boolean_t vm_page_is_cached(vm_object_t object, vm_pindex_t pindex);
|
|
vm_page_t vm_page_lookup (vm_object_t, vm_pindex_t);
|
|
vm_page_t vm_page_next(vm_page_t m);
|
|
int vm_page_pa_tryrelock(pmap_t, vm_paddr_t, vm_paddr_t *);
|
|
vm_page_t vm_page_prev(vm_page_t m);
|
|
void vm_page_putfake(vm_page_t m);
|
|
void vm_page_reference(vm_page_t m);
|
|
void vm_page_remove (vm_page_t);
|
|
void vm_page_rename (vm_page_t, vm_object_t, vm_pindex_t);
|
|
void vm_page_requeue(vm_page_t m);
|
|
void vm_page_set_valid_range(vm_page_t m, int base, int size);
|
|
void vm_page_sleep(vm_page_t m, const char *msg);
|
|
vm_page_t vm_page_splay(vm_pindex_t, vm_page_t);
|
|
vm_offset_t vm_page_startup(vm_offset_t vaddr);
|
|
void vm_page_unhold_pages(vm_page_t *ma, int count);
|
|
void vm_page_unwire (vm_page_t, int);
|
|
void vm_page_updatefake(vm_page_t m, vm_paddr_t paddr, vm_memattr_t memattr);
|
|
void vm_page_wire (vm_page_t);
|
|
void vm_page_set_validclean (vm_page_t, int, int);
|
|
void vm_page_clear_dirty (vm_page_t, int, int);
|
|
void vm_page_set_invalid (vm_page_t, int, int);
|
|
int vm_page_is_valid (vm_page_t, int, int);
|
|
void vm_page_test_dirty (vm_page_t);
|
|
vm_page_bits_t vm_page_bits(int base, int size);
|
|
void vm_page_zero_invalid(vm_page_t m, boolean_t setvalid);
|
|
void vm_page_free_toq(vm_page_t m);
|
|
void vm_page_zero_idle_wakeup(void);
|
|
void vm_page_cowfault (vm_page_t);
|
|
int vm_page_cowsetup(vm_page_t);
|
|
void vm_page_cowclear (vm_page_t);
|
|
|
|
void vm_page_lock_KBI(vm_page_t m, const char *file, int line);
|
|
void vm_page_unlock_KBI(vm_page_t m, const char *file, int line);
|
|
int vm_page_trylock_KBI(vm_page_t m, const char *file, int line);
|
|
#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT)
|
|
void vm_page_lock_assert_KBI(vm_page_t m, int a, const char *file, int line);
|
|
#endif
|
|
|
|
#ifdef INVARIANTS
|
|
void vm_page_object_lock_assert(vm_page_t m);
|
|
#define VM_PAGE_OBJECT_LOCK_ASSERT(m) vm_page_object_lock_assert(m)
|
|
#else
|
|
#define VM_PAGE_OBJECT_LOCK_ASSERT(m) (void)0
|
|
#endif
|
|
|
|
/*
|
|
* vm_page_sleep_if_busy:
|
|
*
|
|
* Sleep and release the page queues lock if VPO_BUSY is set or,
|
|
* if also_m_busy is TRUE, busy is non-zero. Returns TRUE if the
|
|
* thread slept and the page queues lock was released.
|
|
* Otherwise, retains the page queues lock and returns FALSE.
|
|
*
|
|
* The object containing the given page must be locked.
|
|
*/
|
|
static __inline int
|
|
vm_page_sleep_if_busy(vm_page_t m, int also_m_busy, const char *msg)
|
|
{
|
|
|
|
if ((m->oflags & VPO_BUSY) || (also_m_busy && m->busy)) {
|
|
vm_page_sleep(m, msg);
|
|
return (TRUE);
|
|
}
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* vm_page_undirty:
|
|
*
|
|
* Set page to not be dirty. Note: does not clear pmap modify bits
|
|
*/
|
|
static __inline void
|
|
vm_page_undirty(vm_page_t m)
|
|
{
|
|
|
|
VM_PAGE_OBJECT_LOCK_ASSERT(m);
|
|
m->dirty = 0;
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* !_VM_PAGE_ */
|