tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/kcsan head: ffed638b6a2180da8fd002a46632d746af72b299 commit: 7b364f0949ae2dd205d5e9afa4b82ee17030d928 [14/21] READ_ONCE: Drop pointer qualifiers when reading from scalar types config: arm-randconfig-s002-20200521 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-193-gb8fad4bc-dirty git checkout 7b364f0949ae2dd205d5e9afa4b82ee17030d928 # save the attached .config to linux build tree make W=1 C=1 ARCH=arm CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) include/linux/bit_spinlock.h:41:19: sparse: sparse: context imbalance in 'zram_slot_trylock' - different lock contexts for basic block include/linux/bit_spinlock.h:66:9: sparse: sparse: context imbalance in 'zram_slot_unlock' - unexpected unlock vim +/zram_slot_lock +237 arch/arm/include/asm/atomic.h 125897908c71897 Peter Zijlstra 2014-04-23 229 6da068c1beba684 Peter Zijlstra 2016-04-18 230 #undef ATOMIC_OPS 6da068c1beba684 Peter Zijlstra 2016-04-18 231 #define ATOMIC_OPS(op, c_op, asm_op) \ 6da068c1beba684 Peter Zijlstra 2016-04-18 232 ATOMIC_OP(op, c_op, asm_op) \ 6da068c1beba684 Peter Zijlstra 2016-04-18 233 ATOMIC_FETCH_OP(op, c_op, asm_op) 6da068c1beba684 Peter Zijlstra 2016-04-18 234 6da068c1beba684 Peter Zijlstra 2016-04-18 235 ATOMIC_OPS(and, &=, and) 6da068c1beba684 Peter Zijlstra 2016-04-18 236 ATOMIC_OPS(andnot, &= ~, bic) 6da068c1beba684 Peter Zijlstra 2016-04-18 @237 ATOMIC_OPS(or, |=, orr) 6da068c1beba684 Peter Zijlstra 2016-04-18 238 ATOMIC_OPS(xor, ^=, eor) 125897908c71897 Peter Zijlstra 2014-04-23 239 :::::: The code at line 237 was first introduced by commit :::::: 6da068c1beba684b2a0dbf43a07b0529edd9e959 locking/atomic, arch/arm: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}() :::::: TO: Peter Zijlstra <peterz(a)infradead.org&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org