diff --git a/arch/s390/include/asm/preempt.h b/arch/s390/include/asm/preempt.h index 6d6a28bee4e7..ef6ea3163c27 100644 --- a/arch/s390/include/asm/preempt.h +++ b/arch/s390/include/asm/preempt.h @@ -84,7 +84,17 @@ static __always_inline void __preempt_count_add(int val) */ if (!IS_ENABLED(CONFIG_PROFILE_ALL_BRANCHES)) { if (__builtin_constant_p(val) && (val >= -128) && (val <= 127)) { - __atomic_add_const(val, &get_lowcore()->preempt_count); + unsigned long lc_preempt; + + lc_preempt = offsetof(struct lowcore, preempt_count); + asm_inline( + ALTERNATIVE("asi %[offzero](%%r0),%[val]\n", + "asi %[offalt](%%r0),%[val]\n", + ALT_FEATURE(MFEATURE_LOWCORE)) + : "+m" (((struct lowcore *)0)->preempt_count) + : [offzero] "i" (lc_preempt), [val] "i" (val), + [offalt] "i" (lc_preempt + LOWCORE_ALT_ADDRESS) + : "cc"); return; } }