https://github.com/torvalds/linux
Revision 48887e63d6e057543067327da6b091297f7fe645 authored by Al Viro on 06 December 2008, 06:05:50 UTC, committed by Al Viro on 09 December 2008, 07:27:41 UTC
Timestamp in audit_context is valid only if ->in_syscall is set. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 parent 7f0ed77
Tip revision: 48887e63d6e057543067327da6b091297f7fe645 authored by Al Viro on 06 December 2008, 06:05:50 UTC
[PATCH] fix broken timestamps in AVC generated by kernel threads
[PATCH] fix broken timestamps in AVC generated by kernel threads
Tip revision: 48887e6
kref.c
/*
* kref.c - library routines for handling generic reference counted objects
*
* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2004 IBM Corp.
*
* based on lib/kobject.c which was:
* Copyright (C) 2002-2003 Patrick Mochel <mochel@osdl.org>
*
* This file is released under the GPLv2.
*
*/
#include <linux/kref.h>
#include <linux/module.h>
/**
* kref_set - initialize object and set refcount to requested number.
* @kref: object in question.
* @num: initial reference counter
*/
void kref_set(struct kref *kref, int num)
{
atomic_set(&kref->refcount, num);
smp_mb();
}
/**
* kref_init - initialize object.
* @kref: object in question.
*/
void kref_init(struct kref *kref)
{
kref_set(kref, 1);
}
/**
* kref_get - increment refcount for object.
* @kref: object.
*/
void kref_get(struct kref *kref)
{
WARN_ON(!atomic_read(&kref->refcount));
atomic_inc(&kref->refcount);
smp_mb__after_atomic_inc();
}
/**
* kref_put - decrement refcount for object.
* @kref: object.
* @release: pointer to the function that will clean up the object when the
* last reference to the object is released.
* This pointer is required, and it is not acceptable to pass kfree
* in as this function.
*
* Decrement the refcount, and if 0, call release().
* Return 1 if the object was removed, otherwise return 0. Beware, if this
* function returns 0, you still can not count on the kref from remaining in
* memory. Only use the return value if you want to see if the kref is now
* gone, not present.
*/
int kref_put(struct kref *kref, void (*release)(struct kref *kref))
{
WARN_ON(release == NULL);
WARN_ON(release == (void (*)(struct kref *))kfree);
if (atomic_dec_and_test(&kref->refcount)) {
release(kref);
return 1;
}
return 0;
}
EXPORT_SYMBOL(kref_set);
EXPORT_SYMBOL(kref_init);
EXPORT_SYMBOL(kref_get);
EXPORT_SYMBOL(kref_put);
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