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Re:Landing a new syscall, part 1: What is futex? by yencabulator on Friday February 11, 2022 @03:02PM (#30306325)
The non-syscall parts of futex can be inlined, for great benefit.

gettimeofday calls code in the vDSO to avoid codifying in the kernel ABI the much more complex, architecture-dependent, data format.

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