On Sat, Oct 31, 2020 at 1:09 PM Peter Robinson <pbrobinson@xxxxxxxxx> wrote: > > FYI: > > ---------- Forwarded message --------- > From: Ard Biesheuvel <ardb@xxxxxxxxxx> > Date: Sat, Oct 31, 2020 at 10:22 AM > Subject: heads up regarding some v5.10 changes > To: <cross-distro@xxxxxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, > Peter Jones <pjones@xxxxxxxxxx> > > > Hello all, > > Just a note to whomever is subscribed to this list regarding some > changes in v5.10 that may affect distros' kernel deployments: > > efivars > ------- > efivars is the ancient predecessor to efivarFs, that allows access to > EFI variables via sysfs (but with some restrictions). This has been > deprecated since before ARM even had UEFI support, and it is no longer > going to be enabled going forward. EFI pstore has been rewritten to no > longer rely on it, and on x86, the module is still available, but no > longer gets loaded automatically. On !x86, it is no longer built at > all. As far as I could figure out (and I did ask around as well), this > is highly unlikely to regress anything, and on x86, the module can > still be loaded manually if needed (or enabled as a builtin) CONFIG_EFI_VARS is not set on anything except for ARM. I am happy to turn it off for ARM as well with the 5.9 rebases if it will not cause a problem. CONFIG_EFIVAR_FS is enabled across all arches. > deprecated crypto > ----------------- > Some crypto drivers have been made to depend on > CONFIG_CRYPTO_USER_API_ENABLE_OBSOLETE, which is only available if the > crypto AF_ALG socket API is enabled, as the algorithms are never used > by the kernel itself. However, none of these ciphers are known to be > relied upon by user space either (via AF_ALG), and so I strongly > recommend the distros incorporate > > # CONFIG_CRYPTO_USER_API_ENABLE_OBSOLETE is not set Will do. > into their v5.10+ kernel configs so that these deprecated algorithms > are simply dropped from the build (the algos are arc4, tea, khazad, > SEED and anubis, others may follow in the future, e.g., md4/5). Note > that iwd/libell used to rely on the kernel's ecb(arc4) implementation, > but this is no longer the case. > > kexec/kdump tools > ----------- > To make the kernel's PE/COFF header spec compliant, the stext symbol > will be aligned to 64 KB regardless of the page size the kernel was > built with. As far as I can tell looking at the debian source of the > associated tooling, the symbol value of stext is used to infer the > page size, so this will no longer work. > _______________________________________________ > cross-distro mailing list > cross-distro@xxxxxxxxxxxxxxxx > https://lists.linaro.org/mailman/listinfo/cross-distro > _______________________________________________ > kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx
