On Tue, 2021-08-10 at 13:33 +0200, Arnd Bergmann wrote: > On Tue, Aug 10, 2021 at 11:19 AM John Garry <john.garry@xxxxxxxxxx> wrote: > > On 04/08/2021 09:52, Arnd Bergmann wrote: > > > > This seems a reasonable approach. Do you have a plan for this work? Or > > still waiting for the green light? > > I'm rather busy with other work at the moment, so no particular plans > for any time soon. > > > I have noticed the kernel test robot reporting the following to me, > > which seems to be the same issue which was addressed in this series > > originally: > > > > config: s390-randconfig-r032-20210802 (attached as .config) > > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project > > 4f71f59bf3d9914188a11d0c41bedbb339d36ff5) > > ... > > All errors (new ones prefixed by >>): > > > > In file included from drivers/block/null_blk/main.c:12: > > In file included from drivers/block/null_blk/null_blk.h:8: > > In file included from include/linux/blkdev.h:25: > > In file included from include/linux/scatterlist.h:9: > > In file included from arch/s390/include/asm/io.h:75: > > include/asm-generic/io.h:464:31: warning: performing pointer > > arithmetic on a null pointer has undefined behavior > > [-Wnull-pointer-arithmetic] > > val = __raw_readb(PCI_IOBASE + addr); > > > > So I imagine lots of people are seeing these. > > Right, this is the original problem that Niklas was trying to solve. > > If Niklas has time to get this fixed, I can probably find a way to work > with him on finishing up my proposed patch with the changes you > suggested. > > Arnd Sorry for the late reply, this got lost in my inbox. I could spare some cycles on this but I'm not sure how I can help. The series you sent after Linus' nacked the previous approach looks quite broad touching lots of areas I have little experience with. I'd be willing to test things and look over patches the best I can of course. Thanks, Niklas
