From cd12909cb576d37311fe35868780e82d5007d0c8 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Thu, 29 Sep 2011 16:53:32 +0100 Subject: xen: map foreign pages for shared rings by updating the PTEs directly When mapping a foreign page with xenbus_map_ring_valloc() with the GNTTABOP_map_grant_ref hypercall, set the GNTMAP_contains_pte flag and pass a pointer to the PTE (in init_mm). After the page is mapped, the usual fault mechanism can be used to update additional MMs. This allows the vmalloc_sync_all() to be removed from alloc_vm_area(). Signed-off-by: David Vrabel Acked-by: Andrew Morton [v1: Squashed fix by Michal for no-mmu case] Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Michal Simek --- include/linux/vmalloc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 687fb11e2010..4bde182fcf93 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -119,7 +119,7 @@ unmap_kernel_range(unsigned long addr, unsigned long size) #endif /* Allocate/destroy a 'vmalloc' VM area. */ -extern struct vm_struct *alloc_vm_area(size_t size); +extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes); extern void free_vm_area(struct vm_struct *area); /* for /dev/kmem */ -- cgit v1.2.3