1 files changed, 26 insertions, 0 deletions

diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index b103e56806bd..d438ce41cdd5 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -87,6 +87,32 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig
         if (cache_is_vipt_aliasing())
                 flush_pfn_alias(pfn, user_addr);
 }
+
+void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+                         unsigned long uaddr, void *kaddr,
+                         unsigned long len, int write)
+{
+        if (cache_is_vivt()) {
+                if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+                        unsigned long addr = (unsigned long)kaddr;
+                        __cpuc_coherent_kern_range(addr, addr + len);
+                }
+                return;
+        }
+
+        if (cache_is_vipt_aliasing()) {
+                flush_pfn_alias(page_to_pfn(page), uaddr);
+                return;
+        }
+
+        /* VIPT non-aliasing cache */
+        if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask) &&
+            vma->vm_flags | VM_EXEC) {
+                unsigned long addr = (unsigned long)kaddr;
+                /* only flushing the kernel mapping on non-aliasing VIPT */
+                __cpuc_coherent_kern_range(addr, addr + len);
+        }
+}
 #else
 #define flush_pfn_alias(pfn,vaddr)      do { } while (0)
 #endif