change inotifyfs magic as the same magic is used for futexfs

[safe/jmp/linux-2.6] / include / linux / vmalloc.h

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 132b260..89338b4 100644 (file)
--- 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..
  */