Messages in this thread | | | Date | Sat, 25 Oct 2014 17:15:43 +0100 | From | Stefano Stabellini <> | Subject | Re: [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent |
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On Sat, 25 Oct 2014, Ian Campbell wrote: > On Sat, 2014-10-25 at 14:29 +0100, Stefano Stabellini wrote: > > > > Your suggestions and looking more at the code gave me another idea, that > > I think is clean and at the same time suitable for 3.18. > > What do you think of the following? It is simple, self-contained and > > doesn't need a new flag in struct device. > > of_dma_is_coherent looks to be quite expensive though (walks up the > Device Tree doing strcmps on each property of each node until it finds > the one it is looking for.
It takes spin_locks too! Too bad, I think I'll have to ditch it. In that case I'l try the new flag in struct device approach.
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