linux-kernel - Re: [PATCH 1/1] avr32: added mem kernel command line option support

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Message-Id: <20080915083622.062c4b5b.randy.dunlap@oracle.com>
Date:	Mon, 15 Sep 2008 08:36:22 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Marco Stornelli <marco.stornelli@...itel.it>
Cc:	Linux AVR32 <kernel@...32linux.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] avr32: added mem kernel command line option support

On Mon, 15 Sep 2008 17:30:48 +0200 Marco Stornelli wrote:

> From: Marco Stornelli <marco.stornelli@...il.com>
> 
> Fixed the type of size and start, now they are resource_size_t.
> Fixed the double pointer parameter, now it's only a single pointer.
> Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
> ---
> --- linux-2.6.26.5/arch/avr32/kernel/setup.c.orig    2008-09-15 11:30:00.000000000 +0200
> 
> +++ linux-2.6.26.5/arch/avr32/kernel/setup.c 2008-09-15
> 11:30:17.000000000 +0200
> @@ -283,6 +283,25 @@ static int __init early_parse_fbmem(char
> }
> early_param("fbmem", early_parse_fbmem);
> 
> +/*
> + * Pick out the memory size. We look for mem=size@...rt,
> + * where start and size are "size[KkMmGg]"
> + */
> +static int __init early_mem(char *p)
> +{
> + resource_size_t size, start;
> +
> + start = system_ram->start;
> + size = memparse(p, &p);
> + if (**p == '@')
> + start = memparse(p + 1, &p);

Lots of whitespace damage here.  Your first patch looked OK
for whitespace, so something changed....


> +
> + system_ram->start = start;
> + system_ram->end = system_ram->start + size - 1;
> + return 0;
> +}
> +early_param("mem", early_mem);
> +
> static int __init parse_tag_core(struct tag *tag)
> {
> if (tag->hdr.size > 2) {
> 
> Randy Dunlap ha scritto:
> > On Mon, 15 Sep 2008 16:57:10 +0200 Marco Stornelli wrote:
> >
> >   
> >> If you see the above function early_parse_fbmem:
> >>
> >> static int __init early_parse_fbmem(char *p)
> >> {
> >> int ret;
> >> unsigned long align;
> >>
> >> fbmem_size = memparse(p, &p);
> >> .........
> >>
> >> where fbmem_size is a resource_size_t (u32 because avr32 is a 32-bit
> >> architecture), so I used the same philosophy. Maybe I can remove
> >> unsigned long and replace it with resource_size_t to be more uniform.
> >>     
> >
> > Yes, I think that would be better.
> >
> > Thanks.
> >
> >   
> >> Randy Dunlap ha scritto:
> >>     
> >>> On Mon, 15 Sep 2008 12:07:19 +0200 Marco Stornelli wrote:
> >>>
> >>>   
> >>>       
> >>>> From: Marco Stornelli <marco.stornelli@...il.com>
> >>>>
> >>>> Added support for the mem kernel command line option
> >>>> Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
> >>>> ---
> >>>> --- setup.c.orig    2008-09-15 11:30:00.000000000 +0200
> >>>> +++ setup.c    2008-09-15 11:30:17.000000000 +0200
> >>>> @@ -283,6 +283,25 @@ static int __init early_parse_fbmem(char
> >>>>  }
> >>>>  early_param("fbmem", early_parse_fbmem);
> >>>>  
> >>>> +/*
> >>>> + * Pick out the memory size.  We look for mem=size@...rt,
> >>>> + * where start and size are "size[KkMm]"
> >>>>     
> >>>>         
> >>>                                     [KkMmGg]
> >>>
> >>>   
> >>>       
> >>>> + */
> >>>> +static int __init early_mem(char **p)
> >>>> +{
> >>>> +    unsigned long size, start;
> >>>> +
> >>>> +    start = system_ram->start;
> >>>> +    size  = memparse(*p, p);
> >>>>     
> >>>>         
> >>> memparse() returns an unsigned long long.  Is the truncation OK for avr32?
> >>>
> >>>   
> >>>       
> >>>> +    if (**p == '@')
> >>>> +        start = memparse(*p + 1, p);
> >>>> +
> >>>> +    system_ram->start = start;
> >>>> +    system_ram->end = system_ram->start + size - 1;
> >>>> +    return 0;
> >>>> +}
> >>>> +early_param("mem", early_mem);
> >>>> +
> >>>>  static int __init parse_tag_core(struct tag *tag)
> >>>>  {
> >>>>      if (tag->hdr.size > 2) {
> >>>> --


---
~Randy
Linux Plumbers Conference, 17-19 September 2008, Portland, Oregon USA
http://linuxplumbersconf.org/
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