On Thu, Nov 22, 2018 at 09:09:47AM -0800, Linus Torvalds wrote: > On Thu, Nov 22, 2018 at 9:07 AM Russell King - ARM Linux > <linux@xxxxxxxxxxxxxxx> wrote: > > > > I'm afraid that won't work very well - 32 bit platforms with 64-bit > > addresses (LPAE) would have dma_addr_t as a 64-bit value, which > > wouldn't fit into an unsigned long. > > Good point. So we'd have to have a special IS_DMA_ERR() function that > takes a dma_addr_t and checks the same "is it the top 4095 values". No problem with that. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
