1 files changed, 15 insertions, 3 deletions

diff --git a/include/asm-arm/cacheflush.h b/include/asm-arm/cacheflush.h
index fe0c744e0266..e4a2569c636c 100644
--- a/include/asm-arm/cacheflush.h
+++ b/include/asm-arm/cacheflush.h
@@ -247,14 +247,12 @@ extern void dmac_flush_range(unsigned long, unsigned long);
  */
 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
         do {                                                    \
-                flush_cache_page(vma, vaddr, page_to_pfn(page));\
                 memcpy(dst, src, len);                          \
-                flush_dcache_page(page);                        \
+                flush_ptrace_access(vma, page, vaddr, dst, len, 1);\
         } while (0)
 
 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
         do {                                                    \
-                flush_cache_page(vma, vaddr, page_to_pfn(page));\
                 memcpy(dst, src, len);                          \
         } while (0)
 
@@ -285,10 +283,24 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned l
                 __cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
         }
 }
+
+static inline void
+flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+                         unsigned long uaddr, void *kaddr,
+                         unsigned long len, int write)
+{
+        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);
+        }
+}
 #else
 extern void flush_cache_mm(struct mm_struct *mm);
 extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
 extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn);
+extern void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+                                unsigned long uaddr, void *kaddr,
+                                unsigned long len, int write);
 #endif
 
 /*