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Message-ID: <202210031111.01D879A@keescook> Date: Mon, 3 Oct 2022 11:11:45 -0700 From: Kees Cook <keescook@...omium.org> To: Rick Edgecombe <rick.p.edgecombe@...el.com> Cc: x86@...nel.org, "H . Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, linux-mm@...ck.org, linux-arch@...r.kernel.org, linux-api@...r.kernel.org, Arnd Bergmann <arnd@...db.de>, Andy Lutomirski <luto@...nel.org>, Balbir Singh <bsingharora@...il.com>, Borislav Petkov <bp@...en8.de>, Cyrill Gorcunov <gorcunov@...il.com>, Dave Hansen <dave.hansen@...ux.intel.com>, Eugene Syromiatnikov <esyr@...hat.com>, Florian Weimer <fweimer@...hat.com>, "H . J . Lu" <hjl.tools@...il.com>, Jann Horn <jannh@...gle.com>, Jonathan Corbet <corbet@....net>, Mike Kravetz <mike.kravetz@...cle.com>, Nadav Amit <nadav.amit@...il.com>, Oleg Nesterov <oleg@...hat.com>, Pavel Machek <pavel@....cz>, Peter Zijlstra <peterz@...radead.org>, Randy Dunlap <rdunlap@...radead.org>, "Ravi V . Shankar" <ravi.v.shankar@...el.com>, Weijiang Yang <weijiang.yang@...el.com>, "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>, joao.moreira@...el.com, John Allen <john.allen@....com>, kcc@...gle.com, eranian@...gle.com, rppt@...nel.org, jamorris@...ux.microsoft.com, dethoma@...rosoft.com, Yu-cheng Yu <yu-cheng.yu@...el.com>, Peter Xu <peterx@...hat.com> Subject: Re: [PATCH v2 13/39] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 On Thu, Sep 29, 2022 at 03:29:10PM -0700, Rick Edgecombe wrote: > From: Yu-cheng Yu <yu-cheng.yu@...el.com> > > To introduce VM_SHADOW_STACK as VM_HIGH_ARCH_BIT (37), and make all > VM_HIGH_ARCH_BITs stay together, move VM_UFFD_MINOR_BIT from 37 to 38. > > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@...el.com> Reviewed-by: Kees Cook <keescook@...omium.org> -- Kees Cook
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