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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-11-20 18:19:52 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-11-24 17:41:36 +0000 |
| commit | acaac256b3a14a09ab278409a72d119f2d75b02b (patch) | |
| tree | f9e3c66fddc3e40e86d4b03fec166101da1fdb04 /arch/arm/mm/dma-mapping.c | |
| parent | 31ebf94435f74294523683867fe0b89000e61521 (diff) | |
| download | linux-acaac256b3a14a09ab278409a72d119f2d75b02b.tar.gz | |
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/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 23 |
1 files changed, 3 insertions, 20 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 707d81247630..6fac793329c6 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); |