diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
index d26e9fab846a..89c811e0806c 100644
--- a/drivers/staging/sm750fb/sm750.c
+++ b/drivers/staging/sm750fb/sm750.c
@@ -19,12 +19,12 @@
 
 /* common var for all device */
 static int g_hwcursor = 1;
-static int g_noaccel;
-static int g_nomtrr;
+static int g_noaccel __ro_after_init;
+static int g_nomtrr __ro_after_init;
 static const char *g_fbmode[] = {NULL, NULL};
 static const char *g_def_fbmode = "1024x768-32@60";
 static char *g_settings;
-static int g_dualview;
+static int g_dualview __ro_after_init;
 static char *g_option;
 
 static const struct fb_videomode lynx750_ext[] = {