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linuxkpi: Add `rol32()`
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Authored by dumbbell on Jan 7 2026, 9:52 PM.
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Summary

rol64() and rol32() are used by <linux/siphash.h>. The former was added previously, before <linux/siphash.h> was added. However the latter was not, and it broke the build on armv7.

Reported by: adrian
Sponsored by: The FreeBSD Foundation

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rG FreeBSD src repository
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