Allocate and free vmalloc areas
Allocate/release a chunk of vmalloc address space:
alloc_vm_area reserves a chunk of address space, and makes sure all
the pagetables are constructed for that address range - but no pages.
free_vm_area releases the address space range.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: "Jan Beulich" <JBeulich@novell.com>
Cc: "Andi Kleen" <ak@muc.de>
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 132b260..c2b10ca 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -70,6 +70,10 @@
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..
*/