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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-11-20 18:19:52 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-11-24 17:41:36 +0000
commitacaac256b3a14a09ab278409a72d119f2d75b02b (patch)
treef9e3c66fddc3e40e86d4b03fec166101da1fdb04 /arch/arm
parent31ebf94435f74294523683867fe0b89000e61521 (diff)
ARM: dma-mapping: get rid of setting/clearing the reserved page bit
It's unnecessary; x86 doesn't do it, and ALSA doesn't require it anymore. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mm/dma-mapping.c23
1 files changed, 3 insertions, 20 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 707d8124763..6fac793329c 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -209,10 +209,6 @@ __dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
do {
BUG_ON(!pte_none(*pte));
- /*
- * x86 does not mark the pages reserved...
- */
- SetPageReserved(page);
set_pte_ext(pte, mk_pte(page, prot), 0);
page++;
pte++;
@@ -257,7 +253,6 @@ static void __dma_free_remap(void *cpu_addr, size_t size)
addr = c->vm_start;
do {
pte_t pte = ptep_get_and_clear(&init_mm, addr, ptep);
- unsigned long pfn;
ptep++;
addr += PAGE_SIZE;
@@ -267,21 +262,9 @@ static void __dma_free_remap(void *cpu_addr, size_t size)
ptep = consistent_pte[++idx];
}
- if (!pte_none(pte) && pte_present(pte)) {
- pfn = pte_pfn(pte);
-
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
-
- /*
- * x86 does not mark the pages reserved...
- */
- ClearPageReserved(page);
- continue;
- }
- }
- printk(KERN_CRIT "%s: bad page in kernel page table\n",
- __func__);
+ if (pte_none(pte) || !pte_present(pte))
+ printk(KERN_CRIT "%s: bad page in kernel page table\n",
+ __func__);
} while (size -= PAGE_SIZE);
flush_tlb_kernel_range(c->vm_start, c->vm_end);