forked from luck/tmp_suning_uos_patched
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Port on Texas Instruments TMS320C6x architecture
|
|
*
|
|
* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
|
|
* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
|
|
*/
|
|
#ifndef _ASM_C6X_CMPXCHG_H
|
|
#define _ASM_C6X_CMPXCHG_H
|
|
|
|
#include <linux/irqflags.h>
|
|
|
|
/*
|
|
* Misc. functions
|
|
*/
|
|
static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size)
|
|
{
|
|
unsigned int tmp;
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
switch (size) {
|
|
case 1:
|
|
tmp = 0;
|
|
tmp = *((unsigned char *) ptr);
|
|
*((unsigned char *) ptr) = (unsigned char) x;
|
|
break;
|
|
case 2:
|
|
tmp = 0;
|
|
tmp = *((unsigned short *) ptr);
|
|
*((unsigned short *) ptr) = x;
|
|
break;
|
|
case 4:
|
|
tmp = 0;
|
|
tmp = *((unsigned int *) ptr);
|
|
*((unsigned int *) ptr) = x;
|
|
break;
|
|
}
|
|
local_irq_restore(flags);
|
|
return tmp;
|
|
}
|
|
|
|
#define xchg(ptr, x) \
|
|
((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \
|
|
sizeof(*(ptr))))
|
|
|
|
#include <asm-generic/cmpxchg-local.h>
|
|
|
|
/*
|
|
* cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
|
|
* them available.
|
|
*/
|
|
#define cmpxchg_local(ptr, o, n) \
|
|
((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
|
|
(unsigned long)(o), \
|
|
(unsigned long)(n), \
|
|
sizeof(*(ptr))))
|
|
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
|
|
|
|
#include <asm-generic/cmpxchg.h>
|
|
|
|
#endif /* _ASM_C6X_CMPXCHG_H */
|