tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git misc.cmpxchg head: 9e2f22ef1ae21b949a3903727d7e7cd5eb48810f commit: 1b2857f7277164d8bed4e831e3c3696572a51f0b [4/8] sparc32: add __cmpxchg_u{8,16}() and teach __cmpxchg() to handle those sizes config: sparc-randconfig-r132-20240403 (https://download.01.org/0day-ci/archive/20240403/202404030332.d8MKrNbM-lkp@xxxxxxxxx/config) compiler: sparc-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20240403/202404030332.d8MKrNbM-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202404030332.d8MKrNbM-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) kernel/bpf/helpers.c:2157:18: sparse: sparse: symbol 'bpf_task_release_dtor' was not declared. Should it be static? kernel/bpf/helpers.c:2187:18: sparse: sparse: symbol 'bpf_cgroup_release_dtor' was not declared. Should it be static? kernel/bpf/helpers.c: note: in included file (through arch/sparc/include/asm/cmpxchg.h, arch/sparc/include/asm/atomic_32.h, arch/sparc/include/asm/atomic.h, ...): >> arch/sparc/include/asm/cmpxchg_32.h:51:61: sparse: sparse: cast truncates bits from constant value (eb9f becomes 9f) kernel/bpf/helpers.c: note: in included file (through include/linux/timer.h, include/linux/workqueue.h, include/linux/bpf.h): include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true kernel/bpf/helpers.c: note: in included file (through arch/sparc/include/asm/cmpxchg.h, arch/sparc/include/asm/atomic_32.h, arch/sparc/include/asm/atomic.h, ...): >> arch/sparc/include/asm/cmpxchg_32.h:51:61: sparse: sparse: cast truncates bits from constant value (eb9f becomes 9f) kernel/bpf/helpers.c:2495:18: sparse: sparse: context imbalance in 'bpf_rcu_read_lock' - wrong count at exit kernel/bpf/helpers.c:2500:18: sparse: sparse: context imbalance in 'bpf_rcu_read_unlock' - unexpected unlock vim +51 arch/sparc/include/asm/cmpxchg_32.h 44 45 /* don't worry...optimizer will get rid of most of this */ 46 static inline unsigned long 47 __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size) 48 { 49 switch (size) { 50 case 1: > 51 return __cmpxchg_u8((u8 *)ptr, (u8)old, (u8)new_); 52 case 2: 53 return __cmpxchg_u16((u16 *)ptr, (u16)old, (u16)new_); 54 case 4: 55 return __cmpxchg_u32((u32 *)ptr, (u32)old, (u32)new_); 56 default: 57 __cmpxchg_called_with_bad_pointer(); 58 break; 59 } 60 return old; 61 } 62 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
