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| author | Guo Ren <guoren@linux.alibaba.com> | 2021-01-17 18:38:18 +0300 |
|---|---|---|
| committer | Guo Ren <guoren@linux.alibaba.com> | 2021-02-27 11:35:09 +0300 |
| commit | 0d3b051adbb72ed81956447d0d1e54d5943ee6f5 (patch) | |
| tree | 433b4210fd30da045a8a7f8709740a8787d85ac0 /arch/csky/include/asm/vdso/processor.h | |
| parent | 8dcbc611f0fcbcc196dc96e0f833181df0d80242 (diff) | |
| download | linux-0d3b051adbb72ed81956447d0d1e54d5943ee6f5.tar.xz | |
csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO
It could help to reduce the latency of the time-related functions
in user space.
We have referenced arm's and riscv's implementation for the patch.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Vincent Chen <vincent.chen@sifive.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/csky/include/asm/vdso/processor.h')
| -rw-r--r-- | arch/csky/include/asm/vdso/processor.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/csky/include/asm/vdso/processor.h b/arch/csky/include/asm/vdso/processor.h new file mode 100644 index 000000000000..39a6b561d0cc --- /dev/null +++ b/arch/csky/include/asm/vdso/processor.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_VDSO_CSKY_PROCESSOR_H +#define __ASM_VDSO_CSKY_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +#define cpu_relax() barrier() + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_VDSO_CSKY_PROCESSOR_H */ |