On Thu, Apr 21, 2016 at 04:51:38PM -0700, Andrew Morton wrote: > On Mon, 18 Apr 2016 18:04:54 +0200 Ard Biesheuvel <ard.biesheu...@linaro.org> > wrote: > > > These patches allow the arch to define the page_to_virt() conversion that > > is used in lowmem_page_address(). This is desirable for arm64, where this > > conversion is trivial when CONFIG_SPARSEMEM_VMEMMAP is enabled, while > > breaking it up into __va(PFN_PHYS(page_to_pfn(page))), as is done currently > > in lowmem_page_address(), will force the use of a virt-to-phys() conversion > > and back again, which always involves a memory access on arm64, since the > > start of physical memory is not a compile time constant. > > > > I have split off these patches from my series 'arm64: optimize virt_to_page > > and page_address' which I sent out 3 weeks ago, and resending them in the > > hope that they can be picked up (with Will's ack on #3) to be merged via > > the mm tree. > > > > I have cc'ed the nios2 and openrisc maintainers on previous versions, and > > cc'ing them again now. I have dropped both of the arch specific mailing > > lists, since one is defunct and the other is subscriber only. > > > > Andrew, is this something you would be pulling to pick up (assuming that you > > agree with the contents)? Thanks. > > Looks OK to me and apart from the trivial openrisc/nios2 changes it's > obviously a no-op for all-but-arm. So I suggest you include these > patches in the appropriate arm tree. > > Acked-by: Andrew Morton <a...@linux-foundation.org>
Cracking, thanks Andrew. I'll queue these three in the arm64 tree and get them into -next. Will
