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>

1 files changed, 3 insertions, 7 deletions

diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index 7d0a8c230342..87a23ca1fc61 100644
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -23,10 +23,6 @@
 
 #include "mm.h"
 
-/*
- * 0xffff8000 to 0xffffffff is reserved for any ARM architecture
- * specific hacks for copying pages efficiently.
- */
 #define minicache_pgprot __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | \
                                   L_PTE_MT_MINICACHE)
 
@@ -78,10 +74,10 @@ void v4_mc_copy_user_highpage(struct page *to, struct page *from,
 
         raw_spin_lock(&minicache_lock);
 
-        set_pte_ext(TOP_PTE(0xffff8000), pfn_pte(page_to_pfn(from), minicache_pgprot), 0);
-        flush_tlb_kernel_page(0xffff8000);
+        set_pte_ext(TOP_PTE(COPYPAGE_MINICACHE), pfn_pte(page_to_pfn(from), minicache_pgprot), 0);
+        flush_tlb_kernel_page(COPYPAGE_MINICACHE);
 
-        mc_copy_user_page((void *)0xffff8000, kto);
+        mc_copy_user_page((void *)COPYPAGE_MINICACHE, kto);
 
         raw_spin_unlock(&minicache_lock);