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