tree: https://github.com/zen-kernel/zen-kernel 5.5/muqss head: bf569053d0fe08b3615793a0105afff3d28f3676 commit: bf569053d0fe08b3615793a0105afff3d28f3676 [22/22] muqss: Re-define WF_* wake flags in wait.c reproduce: # apt-get install sparse # sparse version: v0.6.1-154-g1dc00f87-dirty git checkout bf569053d0fe08b3615793a0105afff3d28f3676 make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/sched/wait.c:14:9: sparse: sparse: preprocessor token WF_MIGRATED redefined vim +1659 kernel/sched/sched.h cca26e8009d193 Kirill Tkhai 2014-08-20 1653 b13095f07f2546 Li Zefan 2013-03-05 1654 /* b13095f07f2546 Li Zefan 2013-03-05 1655 * wake flags b13095f07f2546 Li Zefan 2013-03-05 1656 */ 97fb7a0a8944bd Ingo Molnar 2018-03-03 1657 #define WF_SYNC 0x01 /* Waker goes to sleep after wakeup */ 97fb7a0a8944bd Ingo Molnar 2018-03-03 1658 #define WF_FORK 0x02 /* Child wakeup after fork */ 97fb7a0a8944bd Ingo Molnar 2018-03-03 @1659 #define WF_MIGRATED 0x4 /* Internal use, task got migrated */ b13095f07f2546 Li Zefan 2013-03-05 1660 :::::: The code at line 1659 was first introduced by commit :::::: 97fb7a0a8944bd6d2c5634e1e0fa689a5c40bc22 sched: Clean up and harmonize the coding style of the scheduler code base :::::: TO: Ingo Molnar <mingo(a)kernel.org&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation