diff --git a/sys/sys/systm.h b/sys/sys/systm.h
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -289,9 +289,9 @@
     void * _Nonnull __restrict kaddr, size_t len);
 int __result_use_check copyin_nofault(const void * __restrict udaddr,
     void * _Nonnull __restrict kaddr, size_t len);
-int __result_use_check copyout(const void * _Nonnull __restrict kaddr,
+int copyout(const void * _Nonnull __restrict kaddr,
     void * __restrict udaddr, size_t len);
-int __result_use_check copyout_nofault(const void * _Nonnull __restrict kaddr,
+int copyout_nofault(const void * _Nonnull __restrict kaddr,
     void * __restrict udaddr, size_t len);
 
 #ifdef SAN_NEEDS_INTERCEPTORS
@@ -313,11 +313,11 @@
 int __result_use_check fueword(volatile const void *base, long *val);
 int __result_use_check fueword32(volatile const void *base, int32_t *val);
 int __result_use_check fueword64(volatile const void *base, int64_t *val);
-int __result_use_check subyte(volatile void *base, int byte);
-int __result_use_check suword(volatile void *base, long word);
-int __result_use_check suword16(volatile void *base, int word);
-int __result_use_check suword32(volatile void *base, int32_t word);
-int __result_use_check suword64(volatile void *base, int64_t word);
+int subyte(volatile void *base, int byte);
+int suword(volatile void *base, long word);
+int suword16(volatile void *base, int word);
+int suword32(volatile void *base, int32_t word);
+int suword64(volatile void *base, int64_t word);
 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
 u_long	casuword(volatile u_long *p, u_long oldval, u_long newval);
 int	casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,