Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: USB mass storage and ARM cache coherency | Date | Thu, 25 Feb 2010 04:48:17 +0100 |
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Am Mittwoch, 24. Februar 2010 22:12:34 schrieb Benjamin Herrenschmidt: > On Wed, 2010-02-24 at 08:16 +0100, Oliver Neukum wrote: > > I don't know. The issue seems quite complex. It would seem better to > > centralize it as far as practical. Do you have a wrapper drivers could > > call? > > flush_dcache_page() ? :-)
Will this do anything on arches that don't need it? Secondly, can we have a wrapper that you can pass a pointer and an offset?
> Now, the subsystem might be the one to know whether something is mapped > into userspace or not (v4l in our case) in which case a wrapper could be > created.
If possible, I'd like to centralize this. Drivers are likely to get this wrong.
Regards Oliver
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