linux-kernel - Re: [PATCH] MIPS: cavium-octeon: remove checks for CONFIG_CAVIUM

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Message-ID: <20140523213701.GD23153@alberich>
Date:	Fri, 23 May 2014 23:37:01 +0200
From:	Andreas Herrmann <herrmann.der.user@...glemail.com>
To:	Ralf Baechle <ralf@...ux-mips.org>
Cc:	Paul Bolle <pebolle@...cali.nl>, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: cavium-octeon: remove checks for CONFIG_CAVIUM_GDB

On Thu, May 22, 2014 at 03:26:45PM +0200, Ralf Baechle wrote:
> On Tue, May 20, 2014 at 06:16:14PM +0200, Paul Bolle wrote:
> 
> > Three checks for CONFIG_CAVIUM_GDB were added in v2.6.29. But the
> > Kconfig symbol CAVIUM_GDB was never added to the tree. Remove these
> > checks.
> > 
> > Also remove the last reference to octeon_get_boot_debug_flag(). There is
> > no definition of that function anyway.
> > 
> > Signed-off-by: Paul Bolle <pebolle@...cali.nl>
> 
> Queued for 3.16.  Thanks Paul & Andreas!
> 
> > A follow up might be to remove plat_smp_ops.cpus_done. All these
> > callbacks are now (basically) nops.
> 
> I'll think about it.  The hook is no useful if unused then again now and
> then ordering issues in SMP startup of secondary CPUs are showing up and
> it may be useful to solve those.  Maybe something like
> 
> void __init smp_cpus_done(unsigned int max_cpus)
> {
> - 	mp_ops->cpus_done();
> + 	if (cpus_done)
> + 		mp_ops->cpus_done();
> }
> 
> which would make a NULL cpus_done function pointer safe and allow empty definitions
> to be removed.

I'd prefer this solution over complete removal of the hook.


Andreas
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