On Thu, Sep 07, 2017 at 11:10:15AM -0700, Christoph Hellwig wrote: > > - if (PageHighMem(pfn_to_page(pfn))) { > > + if (PageHighMem(page) || xpfo_page_is_unmapped(page)) { > > Please don't sprinkle xpfo details over various bits of code. > > Just add a helper with a descriptive name, e.g. > > page_is_unmapped() > > that also includes the highmem case, as that will easily document > what this check is doing. Will do, thanks. Patch 7 has a similar feel to this one, I can add a wrapper around __clean_dcache_area_pou() if that makes sense? Tycho -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>