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amd64: assume the kernel supports RDFSBASE and RDGSBASE
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Authored by brooks on Jun 6 2025, 7:34 PM.
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Details

Summary

There is no need to support pre-12.0 (and thus pre-ino64) kernels in a
15.x libc.

Continue to check if the CPU supports these features before using them
and fall back as required.

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Repository
rG FreeBSD src repository
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