From 503f6f759c6b637e360f86b086557f8ca6398164 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Thu, 16 Aug 2018 15:27:29 +0200 Subject: mips: Add arch/mips/include/asm/atomic.h This is needed for the UBIFS support. The file is a copy of arch/xtensa/include/asm/atomic.h Signed-off-by: Stefan Roese Cc: Daniel Schwierzeck --- arch/mips/include/asm/atomic.h | 54 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 arch/mips/include/asm/atomic.h (limited to 'arch/mips/include') diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h new file mode 100644 index 0000000000..7551bf6e6c --- /dev/null +++ b/arch/mips/include/asm/atomic.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Cadence Design Systems Inc. + */ + +#ifndef _MIPS_ATOMIC_H +#define _MIPS_ATOMIC_H + +#include + +typedef struct { volatile int counter; } atomic_t; + +#define ATOMIC_INIT(i) { (i) } + +#define atomic_read(v) ((v)->counter) +#define atomic_set(v, i) ((v)->counter = (i)) + +static inline void atomic_add(int i, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter += i; + local_irq_restore(flags); +} + +static inline void atomic_sub(int i, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter -= i; + local_irq_restore(flags); +} + +static inline void atomic_inc(atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + ++v->counter; + local_irq_restore(flags); +} + +static inline void atomic_dec(atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + --v->counter; + local_irq_restore(flags); +} + +#endif -- cgit v1.2.3