On Wed, Mar 31, 2021 at 02:15:41PM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: 5e46d1b78a03d52306f21f77a4e4a144b6d31486 > commit: 826bfeb37bb4302ee6042f330c4c0c757152bdb8 preempt/dynamic: Support > dynamic preempt with preempt= boot option > date: 6 weeks ago > config: x86_64-randconfig-r011-20210331 (attached as .config) > compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 > reproduce (this is a W=1 build): > # > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=826bfeb37bb4302ee6042f330c4c0c757152bdb8 > git remote add linus > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout 826bfeb37bb4302ee6042f330c4c0c757152bdb8 > # save the attached .config to linux build tree > make W=1 ARCH=x86_64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <l...@intel.com> > > All warnings (new ones prefixed by >>): > > kernel/sched/core.c: In function 'schedule_tail': > kernel/sched/core.c:4252:13: warning: variable 'rq' set but not used > [-Wunused-but-set-variable] > 4252 | struct rq *rq; > | ^~ > In file included from include/linux/err.h:5, > from include/linux/kthread.h:5, > from include/trace/events/sched.h:8, > from kernel/sched/core.c:10: > kernel/sched/core.c: In function 'setup_preempt_mode': > >> kernel/sched/core.c:5370:37: warning: cast between incompatible function > >> types from 'long int (*)(void)' to 'int (*)(void)' [-Wcast-function-type]
That warning is broken IMO. Still, I have a patch for this somewhere.. I'll try and push it out sometime soon.
