1 files changed, 12 insertions, 2 deletions

diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
index 334ef4150d92..6164a2b34733 100644
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c
@@ -606,9 +606,19 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
                 struct page *page = pfn_to_page(pfn);
                 if (!PageReserved(page)
                     && !test_bit(PG_arch_1, &page->flags)) {
-                        if (vma->vm_mm == current->active_mm)
+                        if (vma->vm_mm == current->active_mm) {
+#ifdef CONFIG_8xx
+                        /* On 8xx, cache control instructions (particularly 
+                         * "dcbst" from flush_dcache_icache) fault as write 
+                         * operation if there is an unpopulated TLB entry 
+                         * for the address in question. To workaround that, 
+                         * we invalidate the TLB here, thus avoiding dcbst 
+                         * misbehaviour.
+                         */
+                                _tlbie(address);
+#endif
                                 __flush_dcache_icache((void *) address);
-                        else
+                        } else
                                 flush_dcache_icache_page(page);
                         set_bit(PG_arch_1, &page->flags);
                 }