12 Sep
2013
12 Sep
'13
8:53 p.m.
Dear Fabio Estevam,
In message CAOMZO5BY6kDOCoWn_SRwhPE7ssMjAReZ2bcFXGgFF-_Wrdgo0g@mail.gmail.com you wrote:
It makes perfect sense to allocate variable with function scope only on the stack. That's what the stack has been invented for.
This buffer in the fec driver will be used in DMA transfer, so maybe that's the reason we should use malloc instead of using the stack?
What has DMA to do with that? We're talking about alignment only.
At least in the kernel, we don't use stack for DMA buffers.
Yes, but them, the kernel uses a much more complicated memory setup, with somewhat different mappings for different regions. We don't do that - or do we? IMO we use a single mapping for the whole RAM ?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
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