linux-kernel - Re: [PATCH -v7 10/11] arm, change reboot_mode to use enum reboot

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Message-ID: <20130502124906.GW3658@sgi.com>
Date:	Thu, 2 May 2013 07:49:06 -0500
From:	Robin Holt <holt@....com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Robin Holt <holt@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Russell King <linux@....linux.org.uk>,
	Guan Xuetao <gxt@...c.pku.edu.cn>,
	Miguel Boton <mboton.lkml@...il.com>,
	Russ Anderson <rja@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Arm Mailing List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH -v7 10/11] arm, change reboot_mode to use enum
 reboot_mode

On Thu, May 02, 2013 at 09:30:20AM +0200, Ingo Molnar wrote:
> 
> * Robin Holt <holt@....com> wrote:
> 
> >  #ifndef __ASSEMBLY__
> >  
> >  #include <linux/types.h>
> > +#include <linux/reboot.h>
> >  
> >  void iop3xx_map_io(void);
> >  void iop_init_cp6_handler(void);
> >  void iop_init_time(unsigned long tickrate);
> > -void iop3xx_restart(char, const char *);
> > +void iop3xx_restart(enum reboot_mode, const char *);
> 
> IMO the introduction of the enum is making things cleaner here all around.
> 
> As long as it's an equivalent transformation for ARM with no reduction in 
> functionality (i.e. please fix any bugs Russell found), this all looks 
> like a nice series.
> 
> Is there no parameter namespace clash between reboot modifier strings on 
> various architectures? I.e. 's' meaning something on x86 and meaning a 
> different thing on ARM or some other architecture.

There is.  I used an #ifdef in kernel/reboot.c.  Also w[arm] | c[old]
on x86 becomes s[oft] | h[ard] | g[pio] on arm/unicore32. (Well, I just
added gpio that to the patch set after noticing I missed it earlier).

Robin
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