On Mon, 5 Apr 2021 02:16:25 +0800 kernel test robot <lkp@xxxxxxxxx> wrote: > Hi Andrey, > > First bad commit (maybe != root cause): > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 2023a53bdf41b7646b1d384b6816af06309f73a5 > commit: 5d92bdffd2d53f98de683229c0ad7d028703fdba kasan: rename CONFIG_TEST_KASAN_MODULE > date: 6 weeks ago > config: arm-randconfig-r024-20210404 (attached as .config) > compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 > 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d92bdffd2d53f98de683229c0ad7d028703fdba > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout 5d92bdffd2d53f98de683229c0ad7d028703fdba > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>): > > lib/test_kasan_module.c: In function 'copy_user_test': > >> lib/test_kasan_module.c:25:6: warning: variable 'unused' set but not used [-Wunused-but-set-variable] > 25 | int unused; > | ^~~~~~ Fair enough ;) --- a/lib/test_kasan_module.c~a +++ a/lib/test_kasan_module.c @@ -22,7 +22,7 @@ static noinline void __init copy_user_te char *kmem; char __user *usermem; size_t size = 10; - int unused; + int __maybe_unused unused; kmem = kmalloc(size, GFP_KERNEL); if (!kmem) _ I guess we could test the copy_*_user return values are as expected, but that isn't the point?
