kernel/arch/s390/include/asm/percpu.h
.. .. @@ -31,7 +31,7 @@ 31 31 pcp_op_T__ *ptr__; \ 32 32 preempt_disable_notrace(); \ 33 33 ptr__ = raw_cpu_ptr(&(pcp)); \ 34 - prev__ = *ptr__; \34 + prev__ = READ_ONCE(*ptr__); \35 35 do { \ 36 36 old__ = prev__; \ 37 37 new__ = old__ op (val); \