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LoongArch: Add vDSO syscall __vdso_getcpu()

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We test 20 million times of getcpu(), the real syscall version take 25
seconds, while the vsyscall version take only 2.4 seconds.

Signed-off-by: Rui Wang <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Huacai Chen 2022-08-06 15:19:33 +08:00
commit dce6098b22
6 changed files with 75 additions and 12 deletions
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