Index: sys/compat/linuxkpi/common/include/linux/io.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/io.h
+++ sys/compat/linuxkpi/common/include/linux/io.h
@@ -390,7 +390,7 @@
 }
 #endif
 
-#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__)
+#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__) || defined(__riscv)
 void *_ioremap_attr(vm_paddr_t phys_addr, unsigned long size, int attr);
 #else
 #define	_ioremap_attr(...) NULL
Index: sys/compat/linuxkpi/common/src/linux_compat.c
===================================================================
--- sys/compat/linuxkpi/common/src/linux_compat.c
+++ sys/compat/linuxkpi/common/src/linux_compat.c
@@ -1819,7 +1819,7 @@
 	return (vmmap);
 }
 
-#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__)
+#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__) || defined(__riscv)
 void *
 _ioremap_attr(vm_paddr_t phys_addr, unsigned long size, int attr)
 {
@@ -1842,7 +1842,7 @@
 	vmmap = vmmap_remove(addr);
 	if (vmmap == NULL)
 		return;
-#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__)
+#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__) || defined(__riscv)
 	pmap_unmapdev((vm_offset_t)addr, vmmap->vm_size);
 #endif
 	kfree(vmmap);