Re: [PATCH 4/4] mm: vmalloc: convert vread() to vread_iter()

[Lorenzo Stoakes <lstoakes@gmail.com>]

On Sun, Mar 19, 2023 at 09:46:03AM +0800, kernel test robot wrote:
> Hi Lorenzo,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on akpm-mm/mm-everything]
> [also build test WARNING on linus/master v6.3-rc2 next-20230317]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Stoakes/fs-proc-kcore-Avoid-bounce-buffer-for-ktext-data/20230319-082147
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/119871ea9507eac7be5d91db38acdb03981e049e.1679183626.git.lstoakes%40gmail.com
> patch subject: [PATCH 4/4] mm: vmalloc: convert vread() to vread_iter()
> config: sparc64-randconfig-r015-20230319 (https://download.01.org/0day-ci/archive/20230319/202303190922.Wk376onx-lkp@intel.com/config)
> compiler: sparc64-linux-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/intel-lab-lkp/linux/commit/a28f374d35bd294a529fcba0b69c8b0e2b66fa6c
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Lorenzo-Stoakes/fs-proc-kcore-Avoid-bounce-buffer-for-ktext-data/20230319-082147
>         git checkout a28f374d35bd294a529fcba0b69c8b0e2b66fa6c
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc64 olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc64 SHELL=/bin/bash arch/sparc/vdso/
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202303190922.Wk376onx-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
>    In file included from include/linux/wait.h:11,
>                     from include/linux/swait.h:8,
>                     from include/linux/completion.h:12,
>                     from include/linux/mm_types.h:14,
>                     from include/linux/uio.h:10,
>                     from include/linux/vmalloc.h:12,
>                     from include/asm-generic/io.h:994,
>                     from arch/sparc/include/asm/io.h:22,
>                     from arch/sparc/vdso/vclock_gettime.c:18:
> >> arch/sparc/include/asm/current.h:18:30: warning: call-clobbered register used for global register variable
>       18 | register struct task_struct *current asm("g4");
>          |                              ^~~~~~~
>    arch/sparc/vdso/vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
>      254 | __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
>          | ^~~~~~~~~~~~~~~~~~~~
>    arch/sparc/vdso/vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
>      282 | __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
>          | ^~~~~~~~~~~~~~~~~~~~~~~~~~
>    arch/sparc/vdso/vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
>      307 | __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
>          | ^~~~~~~~~~~~~~~~~~~
>    arch/sparc/vdso/vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
>      343 | __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
>          | ^~~~~~~~~~~~~~~~~~~~~~~~~
>
>
> vim +18 arch/sparc/include/asm/current.h
>
> ^1da177e4c3f41 include/asm-sparc/current.h Linus Torvalds  2005-04-16  16
> ba89f59ab825d4 include/asm-sparc/current.h David S. Miller 2007-11-16  17  #ifdef CONFIG_SPARC64
> ba89f59ab825d4 include/asm-sparc/current.h David S. Miller 2007-11-16 @18  register struct task_struct *current asm("g4");
> ba89f59ab825d4 include/asm-sparc/current.h David S. Miller 2007-11-16  19  #endif
> ^1da177e4c3f41 include/asm-sparc/current.h Linus Torvalds  2005-04-16  20
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests

This doesn't seem even vaguely related to this patchset, possibly my not
specifying that I am basing on mm-unstable may be a factor here.