1 files changed, 4 insertions, 0 deletions
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 071085f840..23bca46b07 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -352,6 +352,10 @@ static void qemu_init_sigbus(void)
 {
     struct sigaction action;
 
+    /*
+     * ALERT: when modifying this, take care that SIGBUS forwarding in
+     * os_mem_prealloc() will continue working as expected.
+     */
     memset(&action, 0, sizeof(action));
     action.sa_flags = SA_SIGINFO;
     action.sa_sigaction = sigbus_handler;