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drm: ati_pcigart: simplify page_count manipulations

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From: Nick Piggin <npiggin@suse.de>

Allocate a compound page for the user mapping instead of tweaking the page
refcounts.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Dave Airlie 2006-01-25 14:58:58 +11:00 committed by Dave Airlie
parent f1e5c03d34
commit 507d256bae
1 changed files with 4 additions and 7 deletions
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11
drivers/char/drm/ati_pcigart.c
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@ -59,17 +59,16 @@ static void *drm_ati_alloc_pcigart_table(void)
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 NULL;
}
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(void *address)
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);
}