From: "H. Peter Anvin" <hpa@zytor.com>
To: Borislav Petkov <bp@amd64.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Avi Kivity <avi@redhat.com>,
"Przywara, Andre" <Andre.Przywara@amd.com>,
"Pohlack, Martin" <Martin.Pohlack@amd.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -v3.2 3/3] x86, AMD: Move BSP code to cpu_dev helper
Date: Fri, 05 Aug 2011 13:07:40 -0700 [thread overview]
Message-ID: <4E3C4D8C.1010709@zytor.com> (raw)
In-Reply-To: <20110805180409.GC26217@aftab>
On 08/05/2011 11:04 AM, Borislav Petkov wrote:
> Move code which is run once on the BSP during boot into the cpu_dev
> helper.
> +static void __cpuinit bsp_init_amd(struct cpuinfo_x86 *c)
> +{
> + if (static_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
> +
You can't use static_cpu_has() here, since this code runs before
alternatives -- it will always be false. Furthermore, for code that
only runs once, it is never a win to do patching.
Arguably bsp_init should be __init and not __cpuinit, but I don't know
how to make that work with the machinery, and is something that can be
fixed anyway.
-hpa
next prev parent reply other threads:[~2011-08-05 20:08 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-05 13:15 [PATCH -v3.1 0/3] x86, AMD: Correct F15h IC aliasing issue Borislav Petkov
2011-08-05 13:15 ` [PATCH -v3.1 1/3] " Borislav Petkov
2011-08-05 22:58 ` [tip:x86/cpu] x86, amd: Avoid cache aliasing penalties on AMD family 15h tip-bot for Borislav Petkov
2011-08-06 0:10 ` H. Peter Anvin
2011-08-06 12:31 ` [PATCH] x86, AMD: Fix 32-bit build after cache aliasing patch Borislav Petkov
2011-08-06 23:22 ` [tip:x86/cpu] x86-32, amd: Move va_align definition to unbreak 32-bit build tip-bot for Borislav Petkov
2011-08-05 13:15 ` [PATCH -v3.1 2/3] x86: Add a BSP cpuinit helper Borislav Petkov
2011-08-05 13:15 ` [PATCH -v3.1 3/3] x86, AMD: Move BSP code to " Borislav Petkov
2011-08-05 17:10 ` [PATCH -v3.1 0/3] x86, AMD: Correct F15h IC aliasing issue H. Peter Anvin
2011-08-05 17:55 ` Borislav Petkov
2011-08-05 18:01 ` [PATCH -v3.2 2/3] x86: Add a BSP cpu_dev helper Borislav Petkov
2011-08-05 22:58 ` [tip:x86/cpu] " tip-bot for Borislav Petkov
2011-08-05 18:04 ` [PATCH -v3.2 3/3] x86, AMD: Move BSP code to " Borislav Petkov
2011-08-05 20:07 ` H. Peter Anvin [this message]
2011-08-05 22:52 ` Borislav Petkov
2011-08-05 22:56 ` H. Peter Anvin
2011-08-05 22:59 ` [tip:x86/cpu] x86, amd: " tip-bot for Borislav Petkov
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