mirror of https://gitee.com/openkylin/linux.git
[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>
This commit is contained in:
Kay Sievers
Greg Kroah-Hartman
parent
0343821177
commit
0296b22813
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@ -1476,12 +1476,6 @@ W: http://nfs.sourceforge.net/
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W: http://www.cse.unsw.edu.au/~neilb/patches/linux-devel/
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S: Maintained
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KERNEL EVENT LAYER (KOBJECT_UEVENT)
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P: Robert Love
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M: rml@novell.com
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L: linux-kernel@vger.kernel.org
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S: Maintained
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KEXEC
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P: Eric Biederman
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P: Randy Dunlap
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@ -18,7 +18,6 @@
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#include <linux/random.h>
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#include <linux/major.h>
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#include <linux/proc_fs.h>
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#include <linux/kobject_uevent.h>
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#include <linux/interrupt.h>
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#include <linux/poll.h>
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#include <linux/device.h>
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@ -34,7 +34,6 @@
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kobject_uevent.h>
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#include <linux/proc_fs.h>
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#include <linux/syscalls.h>
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#include "z90crypt.h"
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@ -23,15 +23,31 @@
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#include <linux/spinlock.h>
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#include <linux/rwsem.h>
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#include <linux/kref.h>
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#include <linux/kobject_uevent.h>
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#include <linux/kernel.h>
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#include <asm/atomic.h>
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#define KOBJ_NAME_LEN 20
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#define HOTPLUG_PATH_LEN 256
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/* path to the userspace helper executed on an event */
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extern char hotplug_path[];
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/* counter to tag the hotplug event, read only except for the kobject core */
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extern u64 hotplug_seqnum;
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/* the actions here must match the proper string in lib/kobject_uevent.c */
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typedef int __bitwise kobject_action_t;
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enum kobject_action {
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KOBJ_ADD = (__force kobject_action_t) 0x01, /* add event, for hotplug */
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KOBJ_REMOVE = (__force kobject_action_t) 0x02, /* remove event, for hotplug */
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KOBJ_CHANGE = (__force kobject_action_t) 0x03, /* a sysfs attribute file has changed */
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KOBJ_MOUNT = (__force kobject_action_t) 0x04, /* mount event for block devices */
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KOBJ_UMOUNT = (__force kobject_action_t) 0x05, /* umount event for block devices */
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KOBJ_OFFLINE = (__force kobject_action_t) 0x06, /* offline event for hotplug devices */
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KOBJ_ONLINE = (__force kobject_action_t) 0x07, /* online event for hotplug devices */
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};
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struct kobject {
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const char * k_name;
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char name[KOBJ_NAME_LEN];
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@ -243,16 +259,33 @@ extern void subsys_remove_file(struct subsystem * , struct subsys_attribute *);
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#ifdef CONFIG_HOTPLUG
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void kobject_hotplug(struct kobject *kobj, enum kobject_action action);
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int add_hotplug_env_var(char **envp, int num_envp, int *cur_index,
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char *buffer, int buffer_size, int *cur_len,
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const char *format, ...)
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__attribute__((format (printf, 7, 8)));
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int kobject_uevent(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr);
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int kobject_uevent_atomic(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr);
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#else
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static inline void kobject_hotplug(struct kobject *kobj, enum kobject_action action) { }
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static inline int add_hotplug_env_var(char **envp, int num_envp, int *cur_index,
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char *buffer, int buffer_size, int *cur_len,
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const char *format, ...)
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{ return 0; }
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int kobject_uevent(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr)
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{ return 0; }
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int kobject_uevent_atomic(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr)
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{ return 0; }
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#endif
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#endif /* __KERNEL__ */
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@ -1,57 +0,0 @@
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/*
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* kobject_uevent.h - list of kobject user events that can be generated
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*
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* Copyright (C) 2004 IBM Corp.
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* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
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*
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* This file is released under the GPLv2.
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*
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*/
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#ifndef _KOBJECT_EVENT_H_
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#define _KOBJECT_EVENT_H_
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#define HOTPLUG_PATH_LEN 256
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/* path to the hotplug userspace helper executed on an event */
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extern char hotplug_path[];
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/*
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* If you add an action here, you must also add the proper string to the
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* lib/kobject_uevent.c file.
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*/
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typedef int __bitwise kobject_action_t;
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enum kobject_action {
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KOBJ_ADD = (__force kobject_action_t) 0x01, /* add event, for hotplug */
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KOBJ_REMOVE = (__force kobject_action_t) 0x02, /* remove event, for hotplug */
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KOBJ_CHANGE = (__force kobject_action_t) 0x03, /* a sysfs attribute file has changed */
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KOBJ_MOUNT = (__force kobject_action_t) 0x04, /* mount event for block devices */
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KOBJ_UMOUNT = (__force kobject_action_t) 0x05, /* umount event for block devices */
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KOBJ_OFFLINE = (__force kobject_action_t) 0x06, /* offline event for hotplug devices */
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KOBJ_ONLINE = (__force kobject_action_t) 0x07, /* online event for hotplug devices */
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};
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#ifdef CONFIG_KOBJECT_UEVENT
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int kobject_uevent(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr);
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int kobject_uevent_atomic(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr);
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#else
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static inline int kobject_uevent(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr)
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{
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return 0;
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}
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static inline int kobject_uevent_atomic(struct kobject *kobj,
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enum kobject_action action,
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struct attribute *attr)
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{
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return 0;
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}
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#endif
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#endif
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19
init/Kconfig
19
init/Kconfig
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@ -205,25 +205,6 @@ config HOTPLUG
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modules require HOTPLUG functionality, but a module built
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outside the kernel tree does. Such modules require Y here.
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config KOBJECT_UEVENT
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bool "Kernel Userspace Events" if EMBEDDED
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depends on NET
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default y
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help
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This option enables the kernel userspace event layer, which is a
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simple mechanism for kernel-to-user communication over a netlink
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socket.
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The goal of the kernel userspace events layer is to provide a simple
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and efficient events system, that notifies userspace about kobject
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state changes. This will enable applications to just listen for
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events instead of polling system devices and files.
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Hotplug events (kobject addition and removal) are also available on
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the netlink socket in addition to the execution of /sbin/hotplug if
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CONFIG_HOTPLUG is enabled.
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Say Y, unless you are building a system requiring minimal memory
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consumption.
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config IKCONFIG
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bool "Kernel .config support"
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---help---
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@ -31,6 +31,7 @@
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#include <linux/smp_lock.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/kobject.h>
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#include <linux/net.h>
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#include <linux/sysrq.h>
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#include <linux/highuid.h>
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@ -83,9 +84,6 @@ static int ngroups_max = NGROUPS_MAX;
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#ifdef CONFIG_KMOD
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extern char modprobe_path[];
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#endif
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#ifdef CONFIG_HOTPLUG
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extern char hotplug_path[];
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#endif
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#ifdef CONFIG_CHR_DEV_SG
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extern int sg_big_buff;
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#endif
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@ -19,14 +19,17 @@
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#include <linux/skbuff.h>
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#include <linux/netlink.h>
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#include <linux/string.h>
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#include <linux/kobject_uevent.h>
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#include <linux/kobject.h>
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#include <net/sock.h>
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#define BUFFER_SIZE 1024 /* buffer for the hotplug env */
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#define NUM_ENVP 32 /* number of env pointers */
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#if defined(CONFIG_KOBJECT_UEVENT) || defined(CONFIG_HOTPLUG)
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#if defined(CONFIG_HOTPLUG)
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char hotplug_path[HOTPLUG_PATH_LEN] = "/sbin/hotplug";
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u64 hotplug_seqnum;
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static DEFINE_SPINLOCK(sequence_lock);
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static char *action_to_string(enum kobject_action action)
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{
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switch (action) {
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@ -48,9 +51,7 @@ static char *action_to_string(enum kobject_action action)
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return NULL;
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}
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}
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#endif
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#ifdef CONFIG_KOBJECT_UEVENT
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static struct sock *uevent_sock;
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/**
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@ -168,21 +169,6 @@ static int __init kobject_uevent_init(void)
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postcore_initcall(kobject_uevent_init);
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#else
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static inline int send_uevent(const char *signal, const char *obj,
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char **envp, int gfp_mask)
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{
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return 0;
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}
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#endif /* CONFIG_KOBJECT_UEVENT */
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#ifdef CONFIG_HOTPLUG
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char hotplug_path[HOTPLUG_PATH_LEN] = "/sbin/hotplug";
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u64 hotplug_seqnum;
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static DEFINE_SPINLOCK(sequence_lock);
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/**
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* kobject_hotplug - notify userspace by executing /sbin/hotplug
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*
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