return area->addr;
fail:
- warn_alloc_failed(gfp_mask, order, "vmalloc: allocation failure, "
- "allocated %ld of %ld bytes\n",
+ warn_alloc_failed(gfp_mask, order,
+ "vmalloc: allocation failure, allocated %ld of %ld bytes\n",
(area->nr_pages*PAGE_SIZE), area->size);
vfree(area->addr);
return NULL;
size = PAGE_ALIGN(size);
if (!size || (size >> PAGE_SHIFT) > totalram_pages)
- return NULL;
+ goto fail;
area = __get_vm_area_node(size, align, VM_ALLOC | VM_UNLIST,
start, end, node, gfp_mask, caller);
-
if (!area)
- return NULL;
+ goto fail;
addr = __vmalloc_area_node(area, gfp_mask, prot, node, caller);
kmemleak_alloc(addr, real_size, 3, gfp_mask);
return addr;
+
+fail:
+ warn_alloc_failed(gfp_mask, 0,
+ "vmalloc: allocation failure: %lu bytes\n",
+ real_size);
+ return NULL;
}
/**
static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data)
{
- /* apply_to_page_range() does all the hard work. */
+ pte_t ***p = data;
+
+ if (p) {
+ *(*p) = pte;
+ (*p)++;
+ }
return 0;
}
/**
* alloc_vm_area - allocate a range of kernel address space
* @size: size of the area
+ * @ptes: returns the PTEs for the address space
*
* Returns: NULL on failure, vm_struct on success
*
* This function reserves a range of kernel address space, and
* allocates pagetables to map that range. No actual mappings
- * are created. If the kernel address space is not shared
- * between processes, it syncs the pagetable across all
- * processes.
+ * are created.
+ *
+ * If @ptes is non-NULL, pointers to the PTEs (in init_mm)
+ * allocated for the VM area are returned.
*/
-struct vm_struct *alloc_vm_area(size_t size)
+struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes)
{
struct vm_struct *area;
* of kernel virtual address space and mapped into init_mm.
*/
if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
- area->size, f, NULL)) {
+ size, f, ptes ? &ptes : NULL)) {
free_vm_area(area);
return NULL;
}
- /*
- * If the allocated address space is passed to a hypercall
- * before being used then we cannot rely on a page fault to
- * trigger an update of the page tables. So sync all the page
- * tables here.
- */
- vmalloc_sync_all();
-
return area;
}
EXPORT_SYMBOL_GPL(alloc_vm_area);