Merge commit 'v2.6.29-rc4' into sched/core

[linux-2.6-omap-h63xx.git] / arch / arm / mm / fault-armv.c

diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c
index a8ec97b4752e129afcecbded471388af85d6ccb8..bc0099d5ae85c022d12a051062915fa1bae6aefb 100644 (file)
--- a/arch/arm/mm/fault-armv.c
+++ b/arch/arm/mm/fault-armv.c
@@ -17,11 +17,13 @@
 #include <linux/init.h>
 #include <linux/pagemap.h>
 
+#include <asm/bugs.h>
 #include <asm/cacheflush.h>
+#include <asm/cachetype.h>
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>
 
-static unsigned long shared_pte_mask = L_PTE_CACHEABLE;
+static unsigned long shared_pte_mask = L_PTE_MT_BUFFERABLE;
 
 /*
  * We take the easy way out of this problem - we make the
@@ -63,9 +65,13 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address)
         * If this page isn't present, or is already setup to
         * fault (ie, is old), we can safely ignore any issues.
         */
-       if (ret && pte_val(entry) & shared_pte_mask) {
-               flush_cache_page(vma, address, pte_pfn(entry));
-               pte_val(entry) &= ~shared_pte_mask;
+       if (ret && (pte_val(entry) & L_PTE_MT_MASK) != shared_pte_mask) {
+               unsigned long pfn = pte_pfn(entry);
+               flush_cache_page(vma, address, pfn);
+               outer_flush_range((pfn << PAGE_SHIFT),
+                                 (pfn << PAGE_SHIFT) + PAGE_SIZE);
+               pte_val(entry) &= ~L_PTE_MT_MASK;
+               pte_val(entry) |= shared_pte_mask;
                set_pte_at(vma->vm_mm, address, pte, entry);
                flush_tlb_page(vma, address);
        }
@@ -197,7 +203,7 @@ void __init check_writebuffer_bugs(void)
                unsigned long *p1, *p2;
                pgprot_t prot = __pgprot(L_PTE_PRESENT|L_PTE_YOUNG|
                                         L_PTE_DIRTY|L_PTE_WRITE|
-                                        L_PTE_BUFFERABLE);
+                                        L_PTE_MT_BUFFERABLE);
 
                p1 = vmap(&page, 1, VM_IOREMAP, prot);
                p2 = vmap(&page, 1, VM_IOREMAP, prot);
@@ -218,7 +224,7 @@ void __init check_writebuffer_bugs(void)
 
        if (v) {
                printk("failed, %s\n", reason);
-               shared_pte_mask |= L_PTE_BUFFERABLE;
+               shared_pte_mask = L_PTE_MT_UNCACHED;
        } else {
                printk("ok\n");
        }