From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/sh/include/asm/cmpxchg-cas.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 arch/sh/include/asm/cmpxchg-cas.h (limited to 'arch/sh/include/asm/cmpxchg-cas.h') diff --git a/arch/sh/include/asm/cmpxchg-cas.h b/arch/sh/include/asm/cmpxchg-cas.h new file mode 100644 index 000000000..f508db6ea --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-cas.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_CMPXCHG_CAS_H +#define __ASM_SH_CMPXCHG_CAS_H + +static inline unsigned long +__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) +{ + __asm__ __volatile__("cas.l %1,%0,@r0" + : "+r"(new) + : "r"(old), "z"(m) + : "t", "memory" ); + return new; +} + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long old; + do old = *m; + while (__cmpxchg_u32(m, old, val) != old); + return old; +} + +#include + +#endif /* __ASM_SH_CMPXCHG_CAS_H */ -- cgit v1.2.3