ARM: pgtable: move TOP_PTE address definitions to arch/arm/mm/mm.h
Move the TOP_PTE address definitions to one central place so that it's
easy to discover what they're being used for. This helps to ensure
that there are no overlaps.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index 3d9a155..c00a750 100644
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c
@@ -24,9 +24,6 @@
#error FIX ME
#endif
-#define from_address (0xffff8000)
-#define to_address (0xffffc000)
-
static DEFINE_RAW_SPINLOCK(v6_lock);
/*
@@ -90,11 +87,11 @@
*/
raw_spin_lock(&v6_lock);
- set_pte_ext(TOP_PTE(from_address) + offset, pfn_pte(page_to_pfn(from), PAGE_KERNEL), 0);
- set_pte_ext(TOP_PTE(to_address) + offset, pfn_pte(page_to_pfn(to), PAGE_KERNEL), 0);
+ kfrom = COPYPAGE_V6_FROM + (offset << PAGE_SHIFT);
+ kto = COPYPAGE_V6_TO + (offset << PAGE_SHIFT);
- kfrom = from_address + (offset << PAGE_SHIFT);
- kto = to_address + (offset << PAGE_SHIFT);
+ set_pte_ext(TOP_PTE(kfrom), pfn_pte(page_to_pfn(from), PAGE_KERNEL), 0);
+ set_pte_ext(TOP_PTE(kto), pfn_pte(page_to_pfn(to), PAGE_KERNEL), 0);
flush_tlb_kernel_page(kfrom);
flush_tlb_kernel_page(kto);
@@ -111,8 +108,7 @@
*/
static void v6_clear_user_highpage_aliasing(struct page *page, unsigned long vaddr)
{
- unsigned int offset = CACHE_COLOUR(vaddr);
- unsigned long to = to_address + (offset << PAGE_SHIFT);
+ unsigned long to = COPYPAGE_V6_TO + (CACHE_COLOUR(vaddr) << PAGE_SHIFT);
/* FIXME: not highmem safe */
discard_old_kernel_data(page_address(page));
@@ -123,7 +119,7 @@
*/
raw_spin_lock(&v6_lock);
- set_pte_ext(TOP_PTE(to_address) + offset, pfn_pte(page_to_pfn(page), PAGE_KERNEL), 0);
+ set_pte_ext(TOP_PTE(to), pfn_pte(page_to_pfn(page), PAGE_KERNEL), 0);
flush_tlb_kernel_page(to);
clear_page((void *)to);