From: Brian Gerst <bgerst@quark.didntduck.org>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Dead code in i386/kernel/process.c
Date: Sat, 03 Aug 2002 19:09:25 -0400 [thread overview]
Message-ID: <3D4C62A5.8040607@quark.didntduck.org> (raw)
In-Reply-To: <3D4C5B8E.5060009@quark.didntduck.org>
Brian Gerst wrote:
> This patch removes an artifact of code left over from the 2.0 days when
> the kernel didn't use flat segments.
>
>
> ------------------------------------------------------------------------
>
> diff -urN linux-2.5.30/arch/i386/kernel/process.c linux/arch/i386/kernel/process.c
> --- linux-2.5.30/arch/i386/kernel/process.c Fri Aug 2 10:15:28 2002
> +++ linux/arch/i386/kernel/process.c Sat Aug 3 16:41:03 2002
> @@ -313,11 +313,6 @@
> memcpy (swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
> sizeof (swapper_pg_dir [0]) * KERNEL_PGD_PTRS);
>
> - /* Make sure the first page is mapped to the start of physical memory.
> - It is normally not mapped, to trap kernel NULL pointer dereferences. */
> -
> - pg0[0] = _PAGE_RW | _PAGE_PRESENT;
> -
> /*
> * Use `swapper_pg_dir' as our page directory.
> */
I should clarify that the dead code does the same thing as the preceding
memcpy.
next prev parent reply other threads:[~2002-08-03 23:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-03 22:39 Brian Gerst
2002-08-03 23:09 ` Brian Gerst [this message]
2002-08-04 15:45 ` Jamie Lokier
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