linux-kernel - Re: [PATCH] x86/head64: use pointer type in sizeof

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Date:	Tue, 9 Feb 2016 14:53:44 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Alexander Kuleshov <kuleshovmail@...il.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H . Peter Anvin" <hpa@...or.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Andy Lutomirski <luto@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Alexander Popov <alpopov@...ecurity.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/head64: use pointer type in sizeof


* Alexander Kuleshov <kuleshovmail@...il.com> wrote:

> We changed loops with memset in the 5e9ebbd87a99 commit (x86/boot:
> Micro-optimize reset_early_page_tables()). The base for size of
> memset was size of pud_p/pmd_p, but the they are actually
> represented as pointers, although they have the same sizes.

That's rather confused. Also the title is confused:

  x86/head64: use pointer type in sizeof

what the fix does it to _not_ use a pointer type.

I fixed the title and the changelog, but you really need to be more careful...

Thanks,

	Ingo