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From: Ingo Molnar <mingo@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: Yinghai Lu <yinghai@kernel.org>, Baoquan He <bhe@redhat.com>,
	Borislav Petkov <bp@suse.de>, Ingo Molnar <mingo@redhat.com>,
	"x86@kernel.org" <x86@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	"H.J. Lu" <hjl.tools@gmail.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Andy Lutomirski <luto@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86/boot: Rename overlapping memcpy() to memmove()
Date: Sat, 23 Apr 2016 13:08:37 +0200	[thread overview]
Message-ID: <20160423110836.GA12304@gmail.com> (raw)
In-Reply-To: <20160422222641.GA15276@www.outflux.net>


* Kees Cook <keescook@chromium.org> wrote:

> --- a/arch/x86/boot/compressed/string.c
> +++ b/arch/x86/boot/compressed/string.c
> @@ -1,7 +1,13 @@
> +/*
> + * This provides an optimized implementation of memcpy, and a simplified
> + * implementation of memset and memmove, to avoid problems with the
> + * built-in implementations when running in the restricted decompression
> + * stub environment.
> + */

Does 'built in' here mean the compiler's implementation?

We cannot call kernel built-in functions yet, so we have to duplicate everything 
we might need, right?

Thanks,

	Ingo

  reply	other threads:[~2016-04-23 11:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-22 22:26 [PATCH] x86/boot: Rename overlapping memcpy() to memmove() Kees Cook
2016-04-23 11:08 ` Ingo Molnar [this message]
2016-04-23 19:46   ` Kees Cook
2016-04-25  7:36     ` Ingo Molnar

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