8757d5fa6b
__vunmap must not rely on area->nr_pages when picking the release methode for area->pages. It may be too small when __vmalloc_area_node failed early due to lacking memory. Instead, use a flag in vmstruct to differentiate. Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
#ifndef _LINUX_VMALLOC_H
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#define _LINUX_VMALLOC_H
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#include <linux/spinlock.h>
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#include <asm/page.h> /* pgprot_t */
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struct vm_area_struct;
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/* bits in vm_struct->flags */
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#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
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#define VM_ALLOC 0x00000002 /* vmalloc() */
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#define VM_MAP 0x00000004 /* vmap()ed pages */
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#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
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#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
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/* bits [20..32] reserved for arch specific ioremap internals */
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/*
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* Maximum alignment for ioremap() regions.
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* Can be overriden by arch-specific value.
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*/
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#ifndef IOREMAP_MAX_ORDER
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#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
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#endif
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struct vm_struct {
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void *addr;
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unsigned long size;
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unsigned long flags;
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struct page **pages;
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unsigned int nr_pages;
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unsigned long phys_addr;
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struct vm_struct *next;
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};
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/*
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* Highlevel APIs for driver use
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*/
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extern void *vmalloc(unsigned long size);
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extern void *vmalloc_user(unsigned long size);
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extern void *vmalloc_node(unsigned long size, int node);
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extern void *vmalloc_exec(unsigned long size);
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extern void *vmalloc_32(unsigned long size);
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extern void *vmalloc_32_user(unsigned long size);
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extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
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extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
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pgprot_t prot);
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extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask,
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pgprot_t prot, int node);
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extern void vfree(void *addr);
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extern void *vmap(struct page **pages, unsigned int count,
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unsigned long flags, pgprot_t prot);
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extern void vunmap(void *addr);
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extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
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unsigned long pgoff);
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/*
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* Lowlevel-APIs (not for driver use!)
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*/
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extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
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extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
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unsigned long start, unsigned long end);
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extern struct vm_struct *get_vm_area_node(unsigned long size,
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unsigned long flags, int node);
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extern struct vm_struct *remove_vm_area(void *addr);
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extern struct vm_struct *__remove_vm_area(void *addr);
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extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
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struct page ***pages);
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extern void unmap_vm_area(struct vm_struct *area);
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/*
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* Internals. Dont't use..
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*/
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extern rwlock_t vmlist_lock;
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extern struct vm_struct *vmlist;
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#endif /* _LINUX_VMALLOC_H */
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