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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
00b73d8d RF |
2 | #ifndef __ASM_SH_FUTEX_CAS_H |
3 | #define __ASM_SH_FUTEX_CAS_H | |
4 | ||
5 | static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, | |
6 | u32 __user *uaddr, | |
7 | u32 oldval, u32 newval) | |
8 | { | |
9 | int err = 0; | |
10 | __asm__ __volatile__( | |
11 | "1:\n\t" | |
12 | "cas.l %2, %1, @r0\n" | |
13 | "2:\n\t" | |
14 | #ifdef CONFIG_MMU | |
15 | ".section .fixup,\"ax\"\n" | |
16 | "3:\n\t" | |
17 | "mov.l 4f, %0\n\t" | |
18 | "jmp @%0\n\t" | |
19 | " mov %3, %0\n\t" | |
20 | ".balign 4\n" | |
21 | "4: .long 2b\n\t" | |
22 | ".previous\n" | |
23 | ".section __ex_table,\"a\"\n\t" | |
24 | ".long 1b, 3b\n\t" | |
25 | ".previous" | |
26 | #endif | |
27 | :"+r" (err), "+r" (newval) | |
28 | :"r" (oldval), "i" (-EFAULT), "z" (uaddr) | |
29 | :"t", "memory"); | |
30 | if (err) return err; | |
31 | *uval = newval; | |
32 | return 0; | |
33 | } | |
34 | ||
35 | #endif /* __ASM_SH_FUTEX_CAS_H */ |