Date: Fri, 3 Apr 2015 14:05:17 +0200
From: Borislav Petkov <bp@alien8.de>
To: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Alexei Starovoitov <ast@plumgrid.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Kees Cook <keescook@chromium.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Oleg Nesterov <oleg@redhat.com>, Steven Rostedt <rostedt@goodmis.org>,
        Will Drewry <wad@chromium.org>
Subject: Re: [PATCH] x86/asm/entry/64: Fix MSR_IA32_SYSENTER_CS MSR value
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 <551E7EE0.5010901@redhat.com>
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On Fri, Apr 03, 2015 at 01:52:00PM +0200, Denys Vlasenko wrote:
> Why? Segment selectors aren't "long long", they are in fact "short"
> (16-bit ints).
> 
> The "ULL" is used here in wrmsrl not because it's a segment,
> but because wrmsrl expects a u64 parameter.
> 
> We can probably add a cast in its definition...

Yeah, I meant to not use the naked 0. Cast should be fine.

Let me do a patch.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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