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Date: Thu, 21 May 2020 15:59:23 -0700 From: Yu-cheng Yu <yu-cheng.yu@...el.com> To: Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, 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>, Kees Cook <keescook@...omium.org>, 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>, Vedvyas Shanbhogue <vedvyas.shanbhogue@...el.com>, Dave Martin <Dave.Martin@....com>, Weijiang Yang <weijiang.yang@...el.com> Subject: Re: [RFC PATCH 4/5] selftest/x86: Fix sysret_rip with ENDBR On Thu, 2020-05-21 at 23:34 +0200, Thomas Gleixner wrote: > Yu-cheng Yu <yu-cheng.yu@...el.com> writes: > > > Insert endbr64 to assembly code of sysret_rip. > > This changelog explains what the patch does, but not the WHY. It also > lacks any information why this is harmless for !CET enabled systems. > > > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@...el.com> > > --- > > Please consult Dave Hansen about the void between your Signed-off-by > and the '---' line. > > Thanks, > > tglx Thanks! I will work on it. Yu-cheng
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