b73abee375f1c3e3d4e5ea9c0cf99a918d8fc9ef - lib: Move SipHash into lib/crypto/

Sat, 03 Oct 2026 18:28:27 +0200

lib: Move SipHash into lib/crypto/The addition of SipHash to lib/ predated the existence of thelib/crypto/ directory. Since SipHash is a cryptographic algorithm, moveit from the top-level lib/ directory to lib/crypto/.(This does mean HalfSipHash comes with it too, as it's in the samefiles. But lib/crypto/ still seems like the proper place for both.)Specifically:- Move both siphash.c and siphash_kunit.c. Keep the header as-is for now.- Drop the dedicated MAINTAINERS entry for SipHash, as per the suggestion from Jason (https://lore.kernel.org/r/asB7QVFMlgKgbje2@zx2c4.com/). The C files now just fold up to the "CRYPTO LIBRARY" entry. Add the header explicitly, as it otherwise would be left unmaintained.- Move the kconfig option that controls the KUnit test. Put "CRYPTO_LIB" in its name and update the prompt and help text to make it consistent with the other crypto library test options.- Enable the KUnit test in lib/crypto/.kunitconfig.- Link to siphash.rst from the appropriate place in libcrypto-hash.rst.- Use obj-y instead of lib-y, for consistency with the fact that currently lib/crypto/ doesn't use kbuild's support for library file goals. We could keep it as lib-y, but virtually every kernel needs SipHash support anyway (with vsprintf, printk, IPv4, IPv6, etc. depending on it) so there is no practical difference in this case.Acked-by: Ard Biesheuvel Acked-by: Jason A. Donenfeld Link: https://patch.msgid.link/20261003162827.155527-1-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/crypto/siphash.c

Changes in siphash.c

b73abee375f1c3e3d4e5ea9c0cf99a918d8fc9ef - lib: Move SipHash into lib/crypto/