[NaCl SDK] Upate atomic ops in nacl_io

native_client_sdk/src/libraries/nacl_io/mount_node_mem.cc

Index: native_client_sdk/src/libraries/nacl_io/mount_node_mem.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/mount_node_mem.cc b/native_client_sdk/src/libraries/nacl_io/mount_node_mem.cc
index fb403d5cb3a313a84b1677a66e70ca1edd656e25..5beb0b87b13af0da3d4b46331f24ff204edba600 100644
--- a/native_client_sdk/src/libraries/nacl_io/mount_node_mem.cc
+++ b/native_client_sdk/src/libraries/nacl_io/mount_node_mem.cc
@@ -23,7 +23,7 @@ MountNodeMem::~MountNodeMem() { free(data_); }
 Error MountNodeMem::Read(size_t offs, void* buf, size_t count, int* out_bytes) {
   *out_bytes = 0;
 
-  AutoLock lock(&lock_);
+  AUTO_LOCK(node_lock_);
   if (count == 0)
     return 0;
 
@@ -43,7 +43,7 @@ Error MountNodeMem::Write(size_t offs,
                           size_t count,
                           int* out_bytes) {
   *out_bytes = 0;
-  AutoLock lock(&lock_);
+  AUTO_LOCK(node_lock_);
 
   if (count == 0)
     return 0;