On Sat, 9 Jul 2022 14:18:49 -0700 Eric Biggers wrote: > Since the Linux RNG no longer uses sha1_transform(), the SHA-1 library > is no longer needed unconditionally. Make it possible to build the > Linux kernel without the SHA-1 library by putting it behind a kconfig > option, and selecting this new option from the kconfig options that gate > the remaining users: CRYPTO_SHA1 for crypto/sha1_generic.c, BPF for > kernel/bpf/core.c, and IPV6 for net/ipv6/addrconf.c. > > Unfortunately, since BPF is selected by NET, for now this can only make > a difference for kernels built without networking support. > diff --git a/init/Kconfig b/init/Kconfig > index c984afc489dead..d8d0b4bdfe4195 100644 > --- a/init/Kconfig > +++ b/init/Kconfig > @@ -1472,6 +1472,7 @@ config HAVE_PCSPKR_PLATFORM > # interpreter that classic socket filters depend on > config BPF > bool > + select CRYPTO_LIB_SHA1 > Let's give it an explicit CC: bpf@ > diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig > index bf2e5e5fe14273..658bfed1df8b17 100644 > --- a/net/ipv6/Kconfig > +++ b/net/ipv6/Kconfig > @@ -7,6 +7,7 @@ > menuconfig IPV6 > tristate "The IPv6 protocol" > default y > + select CRYPTO_LIB_SHA1 > help > Support for IP version 6 (IPv6). FWIW: Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>
