module: begin_expose() and content() take a non-const module pointer

modules/battery/battery.c

@@ -49,11 +49,11 @@ destroy(struct module *mod)
 }
 
 static struct exposable *
-content(const struct module *mod)
+content(struct module *mod)
 {
     const struct private *m = mod->private;
 
-    mtx_lock(&((struct module *)mod)->lock);
+    mtx_lock(&mod->lock);
 
     assert(m->state == STATE_FULL ||
            m->state == STATE_CHARGING ||
@@ -92,7 +92,7 @@ content(const struct module *mod)
         .count = 6,
     };
 
-    mtx_unlock(&((struct module *)mod)->lock);
+    mtx_unlock(&mod->lock);
 
     struct exposable *exposable = m->label->instantiate(m->label, &tags);
 

modules/clock/clock.c

@@ -21,7 +21,7 @@ destroy(struct module *mod)
 }
 
 static struct exposable *
-content(const struct module *mod)
+content(struct module *mod)
 {
     const struct private *m = mod->private;
     time_t t = time(NULL);

modules/i3/i3.c

@@ -397,7 +397,7 @@ destroy(struct module *mod)
 }
 
 static struct exposable *
-content(const struct module *mod)
+content(struct module *mod)
 {
     struct private *m = mod->private;
 

modules/label/label.c

@@ -19,7 +19,7 @@ destroy(struct module *mod)
 }
 
 static struct exposable *
-content(const struct module *mod)
+content(struct module *mod)
 {
     const struct private *m = mod->private;
     return m->label->instantiate(m->label, NULL);

modules/xkb/xkb.c

@@ -52,7 +52,7 @@ destroy(struct module *mod)
 }
 
 static struct exposable *
-content(const struct module *mod)
+content(struct module *mod)
 {
     const struct private *m = mod->private;
 

modules/xwindow/xwindow.c

@@ -255,7 +255,7 @@ run(struct module_run_context *ctx)
 }
 
 static struct exposable *
-content(const struct module *mod)
+content(struct module *mod)
 {
     struct private *m = mod->private;