e6942b7de2
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
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* Copyright 2004-2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __ARCH_BLACKFIN_ATOMIC__
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#define __ARCH_BLACKFIN_ATOMIC__
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#include <asm/cmpxchg.h>
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#ifdef CONFIG_SMP
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#include <asm/barrier.h>
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#include <linux/linkage.h>
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#include <linux/types.h>
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asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);
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asmlinkage int __raw_atomic_add_asm(volatile int *ptr, int value);
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asmlinkage int __raw_atomic_and_asm(volatile int *ptr, int value);
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asmlinkage int __raw_atomic_or_asm(volatile int *ptr, int value);
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asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value);
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asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value);
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#define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter)
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#define atomic_add_return(i, v) __raw_atomic_add_asm(&(v)->counter, i)
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#define atomic_sub_return(i, v) __raw_atomic_add_asm(&(v)->counter, -(i))
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#define atomic_or(i, v) (void)__raw_atomic_or_asm(&(v)->counter, i)
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#define atomic_and(i, v) (void)__raw_atomic_and_asm(&(v)->counter, i)
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#define atomic_xor(i, v) (void)__raw_atomic_xor_asm(&(v)->counter, i)
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static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
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{
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atomic_and(~mask, v);
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}
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static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
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{
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atomic_or(mask, v);
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}
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#endif
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#include <asm-generic/atomic.h>
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#endif
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