1 files changed, 14 insertions, 0 deletions
diff --git a/include/host_command.h b/include/host_command.h
index 4bf903e6ef..f95fe06966 100644
--- a/include/host_command.h
+++ b/include/host_command.h
@@ -124,6 +124,20 @@ struct host_command {
 uint8_t *host_get_memmap(int offset);
 
 /**
+ * Grab the memmap write mutex. This function should be called before
+ * multi-byte variable reads from ACPI, and before updating multi-byte
+ * memmap variables anywhere else.
+ */
+void host_lock_memmap(void);
+
+/**
+ * Release the memmap write mutex. This function should be called once
+ * a multi-byte variable read from ACPI is done, and when updating multi-byte
+ * memmap variables is done.
+ */
+void host_unlock_memmap(void);
+
+/**
  * Process a host command and return its response
  *
  * @param args	        Command handler args