Re: m(un)map kmalloc buffers to userspace

From: Michal Hocko
Date: Thu Dec 10 2015 - 06:40:19 EST

On Wed 09-12-15 16:35:53, Sebastian Frias wrote:
> We've seen that drivers/media/pci/zoran/zoran_driver.c for example seems to
> be doing as us kmalloc+remap_pfn_range,

This driver is broken - I will post a patch.

> is there any guarantee (or at least an advised heuristic) to determine
> if a driver is "current" (ie: uses the latest APIs and works)?

OK, it seems I was overly optimistic when directing you to existing
drivers. Sorry about that I wasn't aware you could find such a terrible
code there. Please refer to Linux Device Drivers book which should give
you a much better lead (e.g.
Michal Hocko
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