[PATCH] access_process_vm() needs to dirty the page

If POKETEXT modifies the page it needs to tell the VM about it.

kernel/ptrace.c

@@ -189,6 +189,7 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
 		if (write) {
 			memcpy(maddr + offset, buf, bytes);
 			flush_icache_user_range(vma, page, addr, bytes);
+			set_page_dirty_lock(page);
 		} else {
 			memcpy(buf, maddr + offset, bytes);
 		}

mm/filemap.c

@@ -63,6 +63,9 @@
  *  ->mmap_sem
  *    ->i_shared_sem		(various places)
  *
+ *  ->mmap_sem
+ *    ->lock_page		(access_process_vm)
+ *
  *  ->inode_lock
  *    ->sb_lock			(fs/fs-writeback.c)
  *    ->mapping->page_lock	(__sync_single_inode)