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/sh/include/asm/futex-cas.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 arch/sh/include/asm/futex-cas.h (limited to 'arch/sh/include/asm/futex-cas.h') diff --git a/arch/sh/include/asm/futex-cas.h b/arch/sh/include/asm/futex-cas.h new file mode 100644 index 000000000..ed738e32b --- /dev/null +++ b/arch/sh/include/asm/futex-cas.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_FUTEX_CAS_H +#define __ASM_SH_FUTEX_CAS_H + +static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, + u32 __user *uaddr, + u32 oldval, u32 newval) +{ + int err = 0; + __asm__ __volatile__( + "1:\n\t" + "cas.l %2, %1, @r0\n" + "2:\n\t" +#ifdef CONFIG_MMU + ".section .fixup,\"ax\"\n" + "3:\n\t" + "mov.l 4f, %0\n\t" + "jmp @%0\n\t" + " mov %3, %0\n\t" + ".balign 4\n" + "4: .long 2b\n\t" + ".previous\n" + ".section __ex_table,\"a\"\n\t" + ".long 1b, 3b\n\t" + ".previous" +#endif + :"+r" (err), "+r" (newval) + :"r" (oldval), "i" (-EFAULT), "z" (uaddr) + :"t", "memory"); + if (err) return err; + *uval = newval; + return 0; +} + +#endif /* __ASM_SH_FUTEX_CAS_H */ -- cgit v1.2.3