mirror of https://gitee.com/openkylin/linux.git
Finally remove the obnoxious inter_module_xxx()
This was already a bad plan when I argued against adding it in the first place. Good riddance. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse
parent
a15bdeef10
commit
6f18a022fb
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@ -557,13 +557,4 @@ static inline void module_remove_driver(struct device_driver *driver)
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#define __MODULE_STRING(x) __stringify(x)
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/* Use symbol_get and symbol_put instead. You'll thank me. */
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#define HAVE_INTER_MODULE
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extern void __deprecated inter_module_register(const char *,
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struct module *, const void *);
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extern void __deprecated inter_module_unregister(const char *);
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extern const void * __deprecated inter_module_get_request(const char *,
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const char *);
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extern void __deprecated inter_module_put(const char *);
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#endif /* _LINUX_MODULE_H */
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@ -389,9 +389,6 @@ config SLOB
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default !SLAB
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bool
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config OBSOLETE_INTERMODULE
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tristate
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menu "Loadable module support"
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config MODULES
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@ -20,7 +20,6 @@ obj-$(CONFIG_SMP) += cpu.o spinlock.o
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obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
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obj-$(CONFIG_UID16) += uid16.o
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obj-$(CONFIG_MODULES) += module.o
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obj-$(CONFIG_OBSOLETE_INTERMODULE) += intermodule.o
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obj-$(CONFIG_KALLSYMS) += kallsyms.o
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obj-$(CONFIG_PM) += power/
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obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
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@ -1,184 +0,0 @@
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/* Deprecated, do not use. Moved from module.c to here. --RR */
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/* Written by Keith Owens <kaos@ocs.com.au> Oct 2000 */
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#include <linux/module.h>
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#include <linux/kmod.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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/* inter_module functions are always available, even when the kernel is
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* compiled without modules. Consumers of inter_module_xxx routines
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* will always work, even when both are built into the kernel, this
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* approach removes lots of #ifdefs in mainline code.
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*/
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static struct list_head ime_list = LIST_HEAD_INIT(ime_list);
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static DEFINE_SPINLOCK(ime_lock);
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static int kmalloc_failed;
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struct inter_module_entry {
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struct list_head list;
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const char *im_name;
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struct module *owner;
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const void *userdata;
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};
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/**
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* inter_module_register - register a new set of inter module data.
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* @im_name: an arbitrary string to identify the data, must be unique
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* @owner: module that is registering the data, always use THIS_MODULE
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* @userdata: pointer to arbitrary userdata to be registered
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*
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* Description: Check that the im_name has not already been registered,
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* complain if it has. For new data, add it to the inter_module_entry
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* list.
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*/
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void inter_module_register(const char *im_name, struct module *owner, const void *userdata)
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{
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struct list_head *tmp;
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struct inter_module_entry *ime, *ime_new;
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if (!(ime_new = kzalloc(sizeof(*ime), GFP_KERNEL))) {
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/* Overloaded kernel, not fatal */
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printk(KERN_ERR
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"Aiee, inter_module_register: cannot kmalloc entry for '%s'\n",
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im_name);
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kmalloc_failed = 1;
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return;
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}
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ime_new->im_name = im_name;
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ime_new->owner = owner;
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ime_new->userdata = userdata;
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spin_lock(&ime_lock);
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list_for_each(tmp, &ime_list) {
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ime = list_entry(tmp, struct inter_module_entry, list);
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if (strcmp(ime->im_name, im_name) == 0) {
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spin_unlock(&ime_lock);
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kfree(ime_new);
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/* Program logic error, fatal */
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printk(KERN_ERR "inter_module_register: duplicate im_name '%s'", im_name);
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BUG();
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}
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}
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list_add(&(ime_new->list), &ime_list);
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spin_unlock(&ime_lock);
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}
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/**
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* inter_module_unregister - unregister a set of inter module data.
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* @im_name: an arbitrary string to identify the data, must be unique
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*
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* Description: Check that the im_name has been registered, complain if
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* it has not. For existing data, remove it from the
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* inter_module_entry list.
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*/
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void inter_module_unregister(const char *im_name)
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{
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struct list_head *tmp;
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struct inter_module_entry *ime;
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spin_lock(&ime_lock);
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list_for_each(tmp, &ime_list) {
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ime = list_entry(tmp, struct inter_module_entry, list);
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if (strcmp(ime->im_name, im_name) == 0) {
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list_del(&(ime->list));
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spin_unlock(&ime_lock);
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kfree(ime);
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return;
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}
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}
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spin_unlock(&ime_lock);
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if (kmalloc_failed) {
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printk(KERN_ERR
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"inter_module_unregister: no entry for '%s', "
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"probably caused by previous kmalloc failure\n",
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im_name);
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return;
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}
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else {
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/* Program logic error, fatal */
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printk(KERN_ERR "inter_module_unregister: no entry for '%s'", im_name);
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BUG();
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}
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}
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/**
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* inter_module_get - return arbitrary userdata from another module.
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* @im_name: an arbitrary string to identify the data, must be unique
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*
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* Description: If the im_name has not been registered, return NULL.
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* Try to increment the use count on the owning module, if that fails
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* then return NULL. Otherwise return the userdata.
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*/
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static const void *inter_module_get(const char *im_name)
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{
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struct list_head *tmp;
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struct inter_module_entry *ime;
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const void *result = NULL;
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spin_lock(&ime_lock);
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list_for_each(tmp, &ime_list) {
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ime = list_entry(tmp, struct inter_module_entry, list);
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if (strcmp(ime->im_name, im_name) == 0) {
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if (try_module_get(ime->owner))
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result = ime->userdata;
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break;
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}
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}
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spin_unlock(&ime_lock);
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return(result);
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}
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/**
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* inter_module_get_request - im get with automatic request_module.
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* @im_name: an arbitrary string to identify the data, must be unique
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* @modname: module that is expected to register im_name
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*
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* Description: If inter_module_get fails, do request_module then retry.
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*/
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const void *inter_module_get_request(const char *im_name, const char *modname)
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{
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const void *result = inter_module_get(im_name);
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if (!result) {
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request_module("%s", modname);
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result = inter_module_get(im_name);
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}
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return(result);
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}
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/**
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* inter_module_put - release use of data from another module.
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* @im_name: an arbitrary string to identify the data, must be unique
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*
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* Description: If the im_name has not been registered, complain,
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* otherwise decrement the use count on the owning module.
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*/
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void inter_module_put(const char *im_name)
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{
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struct list_head *tmp;
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struct inter_module_entry *ime;
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spin_lock(&ime_lock);
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list_for_each(tmp, &ime_list) {
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ime = list_entry(tmp, struct inter_module_entry, list);
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if (strcmp(ime->im_name, im_name) == 0) {
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if (ime->owner)
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module_put(ime->owner);
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spin_unlock(&ime_lock);
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return;
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}
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}
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spin_unlock(&ime_lock);
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printk(KERN_ERR "inter_module_put: no entry for '%s'", im_name);
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BUG();
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}
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EXPORT_SYMBOL(inter_module_register);
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EXPORT_SYMBOL(inter_module_unregister);
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EXPORT_SYMBOL(inter_module_get_request);
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EXPORT_SYMBOL(inter_module_put);
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MODULE_LICENSE("GPL");
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