Allocate a compound page for the user mapping instead of tweaking
the page refcounts.
Signed-off-by: Nick Piggin <[email protected]>
Index: linux-2.6/drivers/char/drm/ati_pcigart.c
===================================================================
--- linux-2.6.orig/drivers/char/drm/ati_pcigart.c
+++ linux-2.6/drivers/char/drm/ati_pcigart.c
@@ -59,17 +59,16 @@ static void *drm_ati_alloc_pcigart_table
int i;
DRM_DEBUG("%s\n", __FUNCTION__);
- address = __get_free_pages(GFP_KERNEL, ATI_PCIGART_TABLE_ORDER);
+ address = __get_free_pages(GFP_KERNEL | __GFP_COMP,
+ ATI_PCIGART_TABLE_ORDER);
if (address == 0UL) {
return 0;
}
page = virt_to_page(address);
- for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++) {
- get_page(page);
+ for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++)
SetPageReserved(page);
- }
DRM_DEBUG("%s: returning 0x%08lx\n", __FUNCTION__, address);
return (void *)address;
@@ -83,10 +82,8 @@ static void drm_ati_free_pcigart_table(v
page = virt_to_page((unsigned long)address);
- for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++) {
- __put_page(page);
+ for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++)
ClearPageReserved(page);
- }
free_pages((unsigned long)address, ATI_PCIGART_TABLE_ORDER);
}
-
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