linux-kernel - Re: [Bug 7505] Linux-2.6.18 fails to boot on AMD64 machine

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Message-ID: <20061222143520.GG31882@telegraafnet.nl>
Date:	Fri, 22 Dec 2006 15:35:20 +0100
From:	Ard -kwaak- van Breemen <ard@...egraafnet.nl>
To:	Andrew Morton <akpm@...l.org>
Cc:	"Zhang, Yanmin" <yanmin.zhang@...el.com>,
	Chuck Ebbert <76306.1226@...puserve.com>,
	Yinghai Lu <yinghai.lu@....com>, take@...ero.it,
	agalanin@...a.ru, linux-kernel@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [Bug 7505] Linux-2.6.18 fails to boot on AMD64 machine

On Fri, Dec 22, 2006 at 12:30:29AM -0800, Andrew Morton wrote:
> I expect that you'll find that the ide code ends up doing
> down_write(pci_bus_sem), which will enable interrupts.
will:         down_read(&pci_bus_sem);
also enable interrupts?
Since that is called:
init/main.c         start_kernel
kernel/params.c      parse_args("Booting kernel"
kernel/params.c       parse_one
drivers/ide/ide.c      ide_setup
drivers/ide/ide.c       init_ide_data
drivers/ide/ide.c        init_hwif_default
include/asm-i386/ide.h    ide_default_io_base(index)
drivers/pci/search.c       pci_find_device
drivers/pci/search.c        pci_find_subsys
                             down_read(&pci_bus_sem);
                 

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