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[linux.git] / arch / riscv / include / asm / vdso / processor.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef __ASM_VDSO_PROCESSOR_H
3 #define __ASM_VDSO_PROCESSOR_H
4
5 #ifndef __ASSEMBLY__
6
7 #include <asm/barrier.h>
8
9 static inline void cpu_relax(void)
10 {
11 #ifdef __riscv_muldiv
12         int dummy;
13         /* In lieu of a halt instruction, induce a long-latency stall. */
14         __asm__ __volatile__ ("div %0, %0, zero" : "=r" (dummy));
15 #endif
16         barrier();
17 }
18
19 #endif /* __ASSEMBLY__ */
20
21 #endif /* __ASM_VDSO_PROCESSOR_H */
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