linux-kernel - Re: [Bugme-new] [Bug 9217] New: CONFIG

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Message-ID: <20071025122303.GB7543@xi.wantstofly.org>
Date:	Thu, 25 Oct 2007 14:23:03 +0200
From:	Lennert Buytenhek <buytenh@...tstofly.org>
To:	Bill Gatliff <bgat@...lgatliff.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, bugme-daemon@...zilla.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	Russell King <rmk@....linux.org.uk>, svs1957@...il.com
Subject: Re: [Bugme-new] [Bug 9217] New: CONFIG_CMDLINE doesn't pass to kernel

On Wed, Oct 24, 2007 at 10:35:33PM -0500, Bill Gatliff wrote:

> >Something broke CONFIG_CMDLINE of ARM (at least) between 2.6.22 and 2.6.23.
> >
> >I don't know whether it was an ARM patch one of those kernel-wide changes. 
> >We have futzed with the command-line parsing a bit recently, but the 2.6.23
> >changelog doesn't suggest anything obvious.
> 
> What does the affected system's bootloader pass in r2?  If it's nonzero, 
> ARM's 2.6.23 may interpret it as being an ATAGS pointer.  And when that 
> happens, the system prefers the ATAGS over CONFIG_CMDLINE.
> 
> There's sanity checking in __vet_atags, but maybe it isn't enough.  
> Other than that, I can't see anything yet.

If this is the SHARP Shepherd (which seems to be the Zaurus SL-C750,
which looks like it's the one the submitter is using), it's not setting
boot_params at all:

	MACHINE_START(SHEPHERD, "SHARP Shepherd")
		.phys_io        = 0x40000000,
		.io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
		.fixup          = fixup_corgi,
		.map_io         = pxa_map_io,
		.init_irq       = pxa25x_init_irq,
		.init_machine   = corgi_init,
		.timer          = &pxa_timer,
	MACHINE_END
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