8021q: fix a potential memory leak

[mirror_ubuntu-bionic-kernel.git] / include / linux / kmemleak.h

/*
 * include/linux/kmemleak.h
 *
 * Copyright (C) 2008 ARM Limited
 * Written by Catalin Marinas <catalin.marinas@arm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef __KMEMLEAK_H
#define __KMEMLEAK_H

#ifdef CONFIG_DEBUG_KMEMLEAK

extern void kmemleak_init(void) __ref;
extern void kmemleak_alloc(const void *ptr, size_t size, int min_count,
			   gfp_t gfp) __ref;
extern void kmemleak_alloc_percpu(const void __percpu *ptr, size_t size) __ref;
extern void kmemleak_free(const void *ptr) __ref;
extern void kmemleak_free_part(const void *ptr, size_t size) __ref;
extern void kmemleak_free_percpu(const void __percpu *ptr) __ref;
extern void kmemleak_update_trace(const void *ptr) __ref;
extern void kmemleak_not_leak(const void *ptr) __ref;
extern void kmemleak_ignore(const void *ptr) __ref;
extern void kmemleak_scan_area(const void *ptr, size_t size, gfp_t gfp) __ref;
extern void kmemleak_no_scan(const void *ptr) __ref;

static inline void kmemleak_alloc_recursive(const void *ptr, size_t size,
					    int min_count, unsigned long flags,
					    gfp_t gfp)
{
	if (!(flags & SLAB_NOLEAKTRACE))
		kmemleak_alloc(ptr, size, min_count, gfp);
}

static inline void kmemleak_free_recursive(const void *ptr, unsigned long flags)
{
	if (!(flags & SLAB_NOLEAKTRACE))
		kmemleak_free(ptr);
}

static inline void kmemleak_erase(void **ptr)
{
	*ptr = NULL;
}

#else

static inline void kmemleak_init(void)
{
}
static inline void kmemleak_alloc(const void *ptr, size_t size, int min_count,
				  gfp_t gfp)
{
}
static inline void kmemleak_alloc_recursive(const void *ptr, size_t size,
					    int min_count, unsigned long flags,
					    gfp_t gfp)
{
}
static inline void kmemleak_alloc_percpu(const void __percpu *ptr, size_t size)
{
}
static inline void kmemleak_free(const void *ptr)
{
}
static inline void kmemleak_free_part(const void *ptr, size_t size)
{
}
static inline void kmemleak_free_recursive(const void *ptr, unsigned long flags)
{
}
static inline void kmemleak_free_percpu(const void __percpu *ptr)
{
}
static inline void kmemleak_update_trace(const void *ptr)
{
}
static inline void kmemleak_not_leak(const void *ptr)
{
}
static inline void kmemleak_ignore(const void *ptr)
{
}
static inline void kmemleak_scan_area(const void *ptr, size_t size, gfp_t gfp)
{
}
static inline void kmemleak_erase(void **ptr)
{
}
static inline void kmemleak_no_scan(const void *ptr)
{
}

#endif	/* CONFIG_DEBUG_KMEMLEAK */

#endif	/* __KMEMLEAK_H */