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SubjectRe: [PATCH 4/6] pstore/ram: Add some more documentation and examples
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On Wed, May 16, 2012 at 3:11 PM, Anton Vorontsov <cbouatmailru@gmail.com> wrote:
> On Wed, May 16, 2012 at 10:56:09AM -0700, Colin Cross wrote:
> [...]
>> > +You can specify either RAM memory or peripheral devices' memory. However, when
>> > +specifying RAM, be sure to reserve the memory by issuing memblock_reserve()
>> > +very early in the architecture code, just before platform device registration,
>>
>> Just before platform device registration is way too late.  ARM
>> provides a machine reserve callback to allow board files to call
>> memblock_reserve inside arm_memblock_init() and before mm_init().
>
> Yeah, and I guess that 'too late' is also true for all architectures,
> the platform_device_register and friends are most probably unusable
> before mm_init, and after that it's always too late.
>
> So the word 'just' is misleading indeed, I'll remove it.

I think any reference to the time when platform devices are registered
is misleading. There is a very specific point during arch init where
memblock_reserve is valid, and it is nowhere near platform device
registration.
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