diff options
Diffstat (limited to 'include/linux/vmalloc.h')
| -rw-r--r-- | include/linux/vmalloc.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 132b260aef1..89338b468d0 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -58,6 +58,13 @@ void vmalloc_sync_all(void); /* * Lowlevel-APIs (not for driver use!) */ + +static inline size_t get_vm_area_size(const struct vm_struct *area) +{ + /* return actual size without guard page */ + return area->size - PAGE_SIZE; +} + 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); @@ -70,6 +77,10 @@ extern int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page ***pages); extern void unmap_kernel_range(unsigned long addr, unsigned long size); +/* Allocate/destroy a 'vmalloc' VM area. */ +extern struct vm_struct *alloc_vm_area(size_t size); +extern void free_vm_area(struct vm_struct *area); + /* * Internals. Dont't use.. */ |