linux-kernel - Re: max_pfn: Uninitialized, or Deprecated?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0804020910290.14383@anakin>
Date:	Wed, 2 Apr 2008 09:16:52 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	"Kevin D. Kissell" <kevink@...s.com>
cc:	Linux/MIPS Development <linux-mips@...ux-mips.org>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org
Subject: Re: max_pfn: Uninitialized, or Deprecated?

On Tue, 1 Apr 2008, Kevin D. Kissell wrote:
> Once upon a time, the global max_pfn value was set up as part of
> bootmem_init(), but this seems to have been dropped in favor of
> establishing max_low_pfn, I suppose to be clear that it's the max
> non-highmem PFN.  However, the global max_pfn gets used in
> the MIPS APRP support code,  and also in places like
> block/blk-settings.c.  Is the use of max_pfn supposed to be
> deprecated, such that we consider blk-settings.c to be broken
> and change arch/mips/kernel/vpe.c to use max_low_pfn, or
> ought we assign  max_pfn = max_low_pfn in bootmem_init()?

I noticed this too when investigating why initrds no longer worked on
m68k (Fix in http://lkml.org/lkml/2007/12/23/36, still not in mainline).

Apparently a value of max_pfn = 0 is OK, as several architectures
(including MIPS and m68k) don't touch it?

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/