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Message-ID: <CAHk-=wihbCSydApZcH21hev5pcKu=-CrQgwp6qmPwuv5kMpwxQ@mail.gmail.com> Date: Mon, 18 Jul 2022 11:34:50 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Michael Ellerman <mpe@...erman.id.au> Cc: linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>, Sudip Mukherjee <sudipm.mukherjee@...il.com>, Kees Cook <keescook@...omium.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-hardening@...r.kernel.org Subject: Re: [PATCH] powerpc/64s: Disable stack variable initialisation for prom_init On Mon, Jul 18, 2022 at 6:44 AM Michael Ellerman <mpe@...erman.id.au> wrote: > > With GCC 12, allmodconfig enables CONFIG_INIT_STACK_ALL_PATTERN, which > causes the compiler to emit memset calls to initialise on-stack > variables with a pattern. Ahh, and that explains why "volatile" made no difference. That did seem very odd. Thanks for figuring it out, Linus
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