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Date: Tue, 01 Sep 2020 19:50:32 +0200 From: Florian Weimer <fweimer@...hat.com> To: "Yu, Yu-cheng" <yu-cheng.yu@...el.com> Cc: "H.J. Lu" <hjl.tools@...il.com>, Dave Martin <Dave.Martin@....com>, Dave Hansen <dave.hansen@...el.com>, Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, LKML <linux-kernel@...r.kernel.org>, "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>, Linux-MM <linux-mm@...ck.org>, linux-arch <linux-arch@...r.kernel.org>, Linux API <linux-api@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>, 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>, 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>, Weijiang Yang <weijiang.yang@...el.com> Subject: Re: [PATCH v11 25/25] x86/cet/shstk: Add arch_prctl functions for shadow stack * Yu-cheng Yu: > Like other arch_prctl()'s, this parameter was 'unsigned long' > earlier. The idea was, since this arch_prctl is only implemented for > the 64-bit kernel, we wanted it to look as 64-bit only. I will change > it back to 'unsigned long'. What about x32? In general, long is rather problematic for x32. Thanks, Florian
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