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/*-
* Copyright (c) 2017 Mark Johnston <markj@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LINUXKPI_LINUX_SMP_H_
#define _LINUXKPI_LINUX_SMP_H_
#include <asm/smp.h>
/*
* Important note about the use of the function provided below:
*
* The callback function passed to on_each_cpu() is called from a
* so-called critical section, and if you need a mutex you will have
* to rewrite the code to use native FreeBSD mtx spinlocks instead of
* the spinlocks provided by the LinuxKPI! Be very careful to not call
* any LinuxKPI functions inside the on_each_cpu()'s callback
* function, because they may sleep, unlike in native Linux.
*
* Enabling witness(4) when testing, can catch such issues.
*/
#define on_each_cpu(cb, data, wait) ({ \
CTASSERT(wait); \
linux_on_each_cpu(cb, data); \
})
extern int linux_on_each_cpu(void (*)(void *), void *);
#endif /* _LINUXKPI_LINUX_SMP_H_ */
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