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28 lines
626 B
28 lines
626 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_MICROBLAZE_ATOMIC_H |
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#define _ASM_MICROBLAZE_ATOMIC_H |
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#include <asm/cmpxchg.h> |
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#include <asm-generic/atomic.h> |
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#include <asm-generic/atomic64.h> |
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/* |
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* Atomically test *v and decrement if it is greater than 0. |
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* The function returns the old value of *v minus 1. |
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*/ |
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static inline int atomic_dec_if_positive(atomic_t *v) |
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{ |
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unsigned long flags; |
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int res; |
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local_irq_save(flags); |
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res = v->counter - 1; |
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if (res >= 0) |
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v->counter = res; |
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local_irq_restore(flags); |
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return res; |
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} |
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#define atomic_dec_if_positive atomic_dec_if_positive |
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#endif /* _ASM_MICROBLAZE_ATOMIC_H */
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