On Wednesday 24 September 2014 18:17:19 Will Deacon wrote: > > This is version three of the series I've originally posted here: > > v1: https://lkml.org/lkml/2014/4/17/269 > v2: https://lkml.org/lkml/2014/5/22/468 > > This is basically just a rebase on top of 3.17-rc6, minus the alpha patch > (which was merged into mainline). > > I looked at reworking the non-relaxed accessors to imply mmiowb, but it > quickly got messy as some architectures (e.g. mips) deliberately keep > mmiowb and readX/writeX separate whilst others (e.g. powerpc) don't trust > drivers to get mmiowb correct, so add barriers to both. Given that > arm/arm64/x86 don't care about mmiowb, I've left that as an exercise for > an architecture that does care. > > In order to get this lot merged, we probably want to merge the asm-generic > patch (1/17) first, so Acks would be much appreciated on the architecture > bits. > > As before, I've included the original cover letter below, as that describes > what I'm trying to do in more detail. > I'm definitely happy to merge that first patch in the asm-generic tree, or have it go through some other tree along with architecture specific patches. Anything that helps get these functions across all architectures really. I don't think there is any controversy about whether or not we should have the functions, or what the default should be on architectures that don't provide their own, so I wonder why we can't just add the conditional definitions to linux/io.h and remove the trivial definitions from architectures afterwards. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
