[PATCH] Enable all events for initramfs

Currently most driver events are not sent out when using initramfs as
driver_init() (which triggers the events) is called before init_workqueues.

This patch rearranges the init calls so that the hotplug event queue is
enabled prior to calling driver_init(), hence we're getting all hotplug
events again.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/kmod.h

@@ -35,6 +35,7 @@ static inline int request_module(const char * name, ...) { return -ENOSYS; }
 
 #define try_then_request_module(x, mod...) ((x) ?: (request_module(mod), (x)))
 extern int call_usermodehelper(char *path, char *argv[], char *envp[], int wait);
+extern void usermodehelper_init(void);
 
 #ifdef CONFIG_HOTPLUG
 extern char hotplug_path [];

init/main.c

@@ -31,6 +31,7 @@
 #include <linux/tty.h>
 #include <linux/gfp.h>
 #include <linux/percpu.h>
+#include <linux/kmod.h>
 #include <linux/kernel_stat.h>
 #include <linux/security.h>
 #include <linux/workqueue.h>
@@ -605,6 +606,10 @@ static void __init do_initcalls(void)
  */
 static void __init do_basic_setup(void)
 {
+	/* drivers will send hotplug events */
+	init_workqueues();
+	usermodehelper_init();
+
 	driver_init();
 
 #ifdef CONFIG_SYSCTL
@@ -614,7 +619,6 @@ static void __init do_basic_setup(void)
 	/* Networking initialization needs a process context */ 
 	sock_init();
 
-	init_workqueues();
 	do_initcalls();
 }
 

kernel/kmod.c

@@ -272,10 +272,8 @@ int call_usermodehelper(char *path, char **argv, char **envp, int wait)
 }
 EXPORT_SYMBOL(call_usermodehelper);
 
-static __init int usermodehelper_init(void)
+void __init usermodehelper_init(void)
 {
 	khelper_wq = create_singlethread_workqueue("khelper");
 	BUG_ON(!khelper_wq);
-	return 0;
 }
-core_initcall(usermodehelper_init);