Driver core: show "initstate" of module

Show the initialization state(live, coming, going) of the module:
  $ cat /sys/module/usbcore/initstate
  live

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/kernel/module.c b/kernel/module.c
index d9eae45d0145a077d6b32d2b29156f9d3b18bfdd..b565eaeff7e6d73ffcd94d6f531ed3df8fd1b041 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -824,9 +824,34 @@ static inline void module_unload_init(struct module *mod)
 }
 #endif /* CONFIG_MODULE_UNLOAD */
 
+static ssize_t show_initstate(struct module_attribute *mattr,
+                          struct module *mod, char *buffer)
+{
+       const char *state = "unknown";
+
+       switch (mod->state) {
+       case MODULE_STATE_LIVE:
+               state = "live";
+               break;
+       case MODULE_STATE_COMING:
+               state = "coming";
+               break;
+       case MODULE_STATE_GOING:
+               state = "going";
+               break;
+       }
+       return sprintf(buffer, "%s\n", state);
+}
+
+static struct module_attribute initstate = {
+       .attr = { .name = "initstate", .mode = 0444, .owner = THIS_MODULE },
+       .show = show_initstate,
+};
+
 static struct module_attribute *modinfo_attrs[] = {
        &modinfo_version,
        &modinfo_srcversion,
+       &initstate,
 #ifdef CONFIG_MODULE_UNLOAD
        &refcnt,
 #endif