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Message-ID: <48CF5CBB.1050708@coritel.it>
Date: Tue, 16 Sep 2008 09:14:03 +0200
From: Marco Stornelli <marco.stornelli@...itel.it>
To: Randy Dunlap <randy.dunlap@...cle.com>
Cc: Linux AVR32 <kernel@...32linux.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] avr32: added mem kernel command line option support
From: Marco Stornelli <marco.stornelli@...il.com>
Now is it ok? Sorry but it's the first time I submit a patch for the kernel.
Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
---
--- linux-2.6.26.3/arch/avr32/kernel/setup.c.orig 2008-09-15
11:30:00.000000000 +0200
+++ linux-2.6.26.3/arch/avr32/kernel/setup.c 2008-09-16
09:06:31.000000000 +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);
+
+ 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 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/
>
--
Marco Stornelli
Embedded Software Engineer
CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
http://www.coritel.it
marco.stornelli@...itel.it
+39 06 72582838
--
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