From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/microblaze/include/asm/atomic.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 arch/microblaze/include/asm/atomic.h (limited to 'arch/microblaze/include/asm/atomic.h') diff --git a/arch/microblaze/include/asm/atomic.h b/arch/microblaze/include/asm/atomic.h new file mode 100644 index 000000000..41e9aff23 --- /dev/null +++ b/arch/microblaze/include/asm/atomic.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_MICROBLAZE_ATOMIC_H +#define _ASM_MICROBLAZE_ATOMIC_H + +#include +#include +#include + +/* + * 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 */ -- cgit v1.2.3