Date: Tue, 16 Jun 2015 17:46:11 +0200
From: Borislav Petkov <bp@alien8.de>
To: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Alexander Popov <alpopov@ptsecurity.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Andrey Konovalov <adech.fo@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@kernel.org>,
        Alexander Kuleshov <kuleshovmail@gmail.com>,
        Denys Vlasenko <dvlasenk@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Kees Cook <keescook@chromium.org>, x86@kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 1/2] x86_64: remove not needed clear_page for
 init_level4_page
Message-ID: <20150616154611.GJ17786@pd.tnic>
References: <1433842921-18055-1-git-send-email-alpopov@ptsecurity.com>
 <1433842921-18055-2-git-send-email-alpopov@ptsecurity.com>
 <20150616111632.GF17786@pd.tnic>
 <20150616113436.GG17786@pd.tnic>
 <55800C42.4050702@samsung.com>
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On Tue, Jun 16, 2015 at 02:45:06PM +0300, Andrey Ryabinin wrote:
> Can't we just move clear_page(init_level4_pgt) higher? Before or right
> after clear_bss() (iow before kasan_early_init()).

That sounds much better. And I don't see anything depending on
init_level4_pgt before we clear it. And it boots here if I move it
before

	kasan_map_early_shadow(early_level4_pgt);

-- 
Regards/Gruss,
    Boris.

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