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module: add MODULE_STATE_GOING notifier call

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Provide module unload callback. Required by the gcov profiling
infrastructure to keep track of profiling data structures.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Peter Oberparleiter 2008-04-21 14:34:31 +02:00 committed by Rusty Russell
parent b211104d11
commit df4b565e1f
1 changed files with 7 additions and 4 deletions
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11
kernel/module.c
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@ -745,12 +745,13 @@ sys_delete_module(const char __user *name_user, unsigned int flags)
if (!forced && module_refcount(mod) != 0) if (!forced && module_refcount(mod) != 0)
wait_for_zero_refcount(mod); wait_for_zero_refcount(mod);
mutex_unlock(&module_mutex);
/* Final destruction now noone is using it. */ /* Final destruction now noone is using it. */
if (mod->exit != NULL) { if (mod->exit != NULL)
mutex_unlock(&module_mutex);
mod->exit(); mod->exit();
mutex_lock(&module_mutex); blocking_notifier_call_chain(&module_notify_list,
} MODULE_STATE_GOING, mod);
mutex_lock(&module_mutex);
/* Store the name of the last unloaded module for diagnostic purposes */ /* Store the name of the last unloaded module for diagnostic purposes */
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
free_module(mod); free_module(mod);
@ -2191,6 +2192,8 @@ sys_init_module(void __user *umod,
mod->state = MODULE_STATE_GOING; mod->state = MODULE_STATE_GOING;
synchronize_sched(); synchronize_sched();
module_put(mod); module_put(mod);
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_GOING, mod);
mutex_lock(&module_mutex); mutex_lock(&module_mutex);
free_module(mod); free_module(mod);
mutex_unlock(&module_mutex); mutex_unlock(&module_mutex);