android_kernel_motorola_sm6225/include/linux/vmalloc.h
Andi Kleen 7856dfeb23 [PATCH] x86_64: Fixed guard page handling again in iounmap
Caused oopses again.  Also fix potential mismatch in checking if
change_page_attr was needed.

To do it without races I needed to change mm/vmalloc.c to export a
__remove_vm_area that does not take vmlist lock.

Noticed by Terence Ripperda and based on a patch of his.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-20 15:48:20 -07:00

55 lines
1.7 KiB
C

#ifndef _LINUX_VMALLOC_H
#define _LINUX_VMALLOC_H
#include <linux/spinlock.h>
#include <asm/page.h> /* pgprot_t */
/* bits in vm_struct->flags */
#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
#define VM_ALLOC 0x00000002 /* vmalloc() */
#define VM_MAP 0x00000004 /* vmap()ed pages */
/* bits [20..32] reserved for arch specific ioremap internals */
struct vm_struct {
void *addr;
unsigned long size;
unsigned long flags;
struct page **pages;
unsigned int nr_pages;
unsigned long phys_addr;
struct vm_struct *next;
};
/*
* Highlevel APIs for driver use
*/
extern void *vmalloc(unsigned long size);
extern void *vmalloc_exec(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *__vmalloc(unsigned long size, unsigned int __nocast gfp_mask, pgprot_t prot);
extern void *__vmalloc_area(struct vm_struct *area, unsigned int __nocast gfp_mask, pgprot_t prot);
extern void vfree(void *addr);
extern void *vmap(struct page **pages, unsigned int count,
unsigned long flags, pgprot_t prot);
extern void vunmap(void *addr);
/*
* Lowlevel-APIs (not for driver use!)
*/
extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end);
extern struct vm_struct *remove_vm_area(void *addr);
extern struct vm_struct *__remove_vm_area(void *addr);
extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
struct page ***pages);
extern void unmap_vm_area(struct vm_struct *area);
/*
* Internals. Dont't use..
*/
extern rwlock_t vmlist_lock;
extern struct vm_struct *vmlist;
#endif /* _LINUX_VMALLOC_H */