[PATCH] remove CONFIG_KOBJECT_UEVENT option

It makes zero sense to have hotplug, but not the netlink
events enabled today. Remove this option and merge the
kobject_uevent.h header into the kobject.h header file.

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

8 files changed, 40 insertions, 107 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 6af683025ae..b49a4ad3b87 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1476,12 +1476,6 @@ W:	http://nfs.sourceforge.net/
 W:      http://www.cse.unsw.edu.au/~neilb/patches/linux-devel/
 S:      Maintained
 
-KERNEL EVENT LAYER (KOBJECT_UEVENT)
-P:      Robert Love
-M:      rml@novell.com
-L:      linux-kernel@vger.kernel.org
-S:      Maintained
-
 KEXEC
 P:      Eric Biederman
 P:      Randy Dunlap
diff --git a/drivers/input/input.c b/drivers/input/input.c
index bdd2a7fc268..43b49ccd7da 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -18,7 +18,6 @@
 #include <linux/random.h>
 #include <linux/major.h>
 #include <linux/proc_fs.h>
-#include <linux/kobject_uevent.h>
 #include <linux/interrupt.h>
 #include <linux/poll.h>
 #include <linux/device.h>
diff --git a/drivers/s390/crypto/z90main.c b/drivers/s390/crypto/z90main.c
index 4010f2bb85a..790fcbb74b4 100644
--- a/drivers/s390/crypto/z90main.c
+++ b/drivers/s390/crypto/z90main.c
@@ -34,7 +34,6 @@
 #include <linux/miscdevice.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/kobject_uevent.h>
 #include <linux/proc_fs.h>
 #include <linux/syscalls.h>
 #include "z90crypt.h"
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 7f7403aa4a4..baf5251d9f6 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -23,15 +23,31 @@
 #include <linux/spinlock.h>
 #include <linux/rwsem.h>
 #include <linux/kref.h>
-#include <linux/kobject_uevent.h>
 #include <linux/kernel.h>
 #include <asm/atomic.h>
 
 #define KOBJ_NAME_LEN   20
 
+#define HOTPLUG_PATH_LEN        256
+
+/* path to the userspace helper executed on an event */
+extern char hotplug_path[];
+
 /* counter to tag the hotplug event, read only except for the kobject core */
 extern u64 hotplug_seqnum;
 
+/* the actions here must match the proper string in lib/kobject_uevent.c */
+typedef int __bitwise kobject_action_t;
+enum kobject_action {
+        KOBJ_ADD        = (__force kobject_action_t) 0x01,      /* add event, for hotplug */
+        KOBJ_REMOVE     = (__force kobject_action_t) 0x02,      /* remove event, for hotplug */
+        KOBJ_CHANGE     = (__force kobject_action_t) 0x03,      /* a sysfs attribute file has changed */
+        KOBJ_MOUNT      = (__force kobject_action_t) 0x04,      /* mount event for block devices */
+        KOBJ_UMOUNT     = (__force kobject_action_t) 0x05,      /* umount event for block devices */
+        KOBJ_OFFLINE    = (__force kobject_action_t) 0x06,      /* offline event for hotplug devices */
+        KOBJ_ONLINE     = (__force kobject_action_t) 0x07,      /* online event for hotplug devices */
+};
+
 struct kobject {
         const char              * k_name;
         char                    name[KOBJ_NAME_LEN];
@@ -243,16 +259,33 @@ extern void subsys_remove_file(struct subsystem * , struct subsys_attribute *);
 
 #ifdef CONFIG_HOTPLUG
 void kobject_hotplug(struct kobject *kobj, enum kobject_action action);
+
 int add_hotplug_env_var(char **envp, int num_envp, int *cur_index,
                         char *buffer, int buffer_size, int *cur_len,
                         const char *format, ...)
         __attribute__((format (printf, 7, 8)));
+
+int kobject_uevent(struct kobject *kobj,
+                   enum kobject_action action,
+                   struct attribute *attr);
+int kobject_uevent_atomic(struct kobject *kobj,
+                          enum kobject_action action,
+                          struct attribute *attr);
+
 #else
 static inline void kobject_hotplug(struct kobject *kobj, enum kobject_action action) { }
 static inline int add_hotplug_env_var(char **envp, int num_envp, int *cur_index, 
                                       char *buffer, int buffer_size, int *cur_len, 
                                       const char *format, ...)
 { return 0; }
+int kobject_uevent(struct kobject *kobj,
+                   enum kobject_action action,
+                   struct attribute *attr)
+{ return 0; }
+int kobject_uevent_atomic(struct kobject *kobj,
+                          enum kobject_action action,
+                          struct attribute *attr)
+{ return 0; }
 #endif
 
 #endif /* __KERNEL__ */
diff --git a/include/linux/kobject_uevent.h b/include/linux/kobject_uevent.h
deleted file mode 100644
index aa664fe7e56..00000000000
--- a/include/linux/kobject_uevent.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * kobject_uevent.h - list of kobject user events that can be generated
- *
- * Copyright (C) 2004 IBM Corp.
- * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
- *
- * This file is released under the GPLv2.
- *
- */
-
-#ifndef _KOBJECT_EVENT_H_
-#define _KOBJECT_EVENT_H_
-
-#define HOTPLUG_PATH_LEN        256
-
-/* path to the hotplug userspace helper executed on an event */
-extern char hotplug_path[];
-
-/*
- * If you add an action here, you must also add the proper string to the
- * lib/kobject_uevent.c file.
- */
-typedef int __bitwise kobject_action_t;
-enum kobject_action {
-        KOBJ_ADD        = (__force kobject_action_t) 0x01,      /* add event, for hotplug */
-        KOBJ_REMOVE     = (__force kobject_action_t) 0x02,      /* remove event, for hotplug */
-        KOBJ_CHANGE     = (__force kobject_action_t) 0x03,      /* a sysfs attribute file has changed */
-        KOBJ_MOUNT      = (__force kobject_action_t) 0x04,      /* mount event for block devices */
-        KOBJ_UMOUNT     = (__force kobject_action_t) 0x05,      /* umount event for block devices */
-        KOBJ_OFFLINE    = (__force kobject_action_t) 0x06,      /* offline event for hotplug devices */
-        KOBJ_ONLINE     = (__force kobject_action_t) 0x07,      /* online event for hotplug devices */
-};
-
-
-#ifdef CONFIG_KOBJECT_UEVENT
-int kobject_uevent(struct kobject *kobj,
-                   enum kobject_action action,
-                   struct attribute *attr);
-int kobject_uevent_atomic(struct kobject *kobj,
-                          enum kobject_action action,
-                          struct attribute *attr);
-#else
-static inline int kobject_uevent(struct kobject *kobj,
-                                 enum kobject_action action,
-                                 struct attribute *attr)
-{
-        return 0;
-}
-static inline int kobject_uevent_atomic(struct kobject *kobj,
-                                        enum kobject_action action,
-                                        struct attribute *attr)
-{
-        return 0;
-}
-#endif
-
-#endif
diff --git a/init/Kconfig b/init/Kconfig
index 9fc0759fa94..0de8b7765ae 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -205,25 +205,6 @@ config HOTPLUG
           modules require HOTPLUG functionality, but a module built
           outside the kernel tree does. Such modules require Y here.
 
-config KOBJECT_UEVENT
-        bool "Kernel Userspace Events" if EMBEDDED
-        depends on NET
-        default y
-        help
-          This option enables the kernel userspace event layer, which is a
-          simple mechanism for kernel-to-user communication over a netlink
-          socket.
-          The goal of the kernel userspace events layer is to provide a simple
-          and efficient events system, that notifies userspace about kobject
-          state changes. This will enable applications to just listen for
-          events instead of polling system devices and files.
-          Hotplug events (kobject addition and removal) are also available on
-          the netlink socket in addition to the execution of /sbin/hotplug if
-          CONFIG_HOTPLUG is enabled.
-
-          Say Y, unless you are building a system requiring minimal memory
-          consumption.
-
 config IKCONFIG
         bool "Kernel .config support"
         ---help---
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index b53115b882e..6a51e25d446 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -31,6 +31,7 @@
 #include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/kobject.h>
 #include <linux/net.h>
 #include <linux/sysrq.h>
 #include <linux/highuid.h>
@@ -83,9 +84,6 @@ static int ngroups_max = NGROUPS_MAX;
 #ifdef CONFIG_KMOD
 extern char modprobe_path[];
 #endif
-#ifdef CONFIG_HOTPLUG
-extern char hotplug_path[];
-#endif
 #ifdef CONFIG_CHR_DEV_SG
 extern int sg_big_buff;
 #endif
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 3ab375411e3..1f90eea7eeb 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -19,14 +19,17 @@
 #include <linux/skbuff.h>
 #include <linux/netlink.h>
 #include <linux/string.h>
-#include <linux/kobject_uevent.h>
 #include <linux/kobject.h>
 #include <net/sock.h>
 
 #define BUFFER_SIZE     1024    /* buffer for the hotplug env */
 #define NUM_ENVP        32      /* number of env pointers */
 
-#if defined(CONFIG_KOBJECT_UEVENT) || defined(CONFIG_HOTPLUG)
+#if defined(CONFIG_HOTPLUG)
+char hotplug_path[HOTPLUG_PATH_LEN] = "/sbin/hotplug";
+u64 hotplug_seqnum;
+static DEFINE_SPINLOCK(sequence_lock);
+
 static char *action_to_string(enum kobject_action action)
 {
         switch (action) {
@@ -48,9 +51,7 @@ static char *action_to_string(enum kobject_action action)
                 return NULL;
         }
 }
-#endif
 
-#ifdef CONFIG_KOBJECT_UEVENT
 static struct sock *uevent_sock;
 
 /**
@@ -168,21 +169,6 @@ static int __init kobject_uevent_init(void)
 
 postcore_initcall(kobject_uevent_init);
 
-#else
-static inline int send_uevent(const char *signal, const char *obj,
-                              char **envp, int gfp_mask)
-{
-        return 0;
-}
-
-#endif /* CONFIG_KOBJECT_UEVENT */
-
-
-#ifdef CONFIG_HOTPLUG
-char hotplug_path[HOTPLUG_PATH_LEN] = "/sbin/hotplug";
-u64 hotplug_seqnum;
-static DEFINE_SPINLOCK(sequence_lock);
-
 /**
  * kobject_hotplug - notify userspace by executing /sbin/hotplug
  *