sandbox: Add missing comments for os_alarm()
Add the documentation to avoid a warning with 'make htmldocs'.
Fixes: 10107efedd5 ("sandbox: add SIGALRM-based watchdog device")
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/os.h b/include/os.h
index 54874f5..0415f0f 100644
--- a/include/os.h
+++ b/include/os.h
@@ -110,6 +110,10 @@
/**
* os_alarm() - access to the OS alarm() system call
+ *
+ * @seconds: number of seconds before the signal is sent
+ * Returns: number of seconds remaining until any previously scheduled alarm was
+ * due to be delivered; 0 if there was no previously scheduled alarm
*/
unsigned int os_alarm(unsigned int seconds);