diff --git a/sys/compat/linuxkpi/common/include/linux/rwsem.h b/sys/compat/linuxkpi/common/include/linux/rwsem.h
--- a/sys/compat/linuxkpi/common/include/linux/rwsem.h
+++ b/sys/compat/linuxkpi/common/include/linux/rwsem.h
@@ -46,6 +46,7 @@
 #define	down_read(_rw)			sx_slock(&(_rw)->sx)
 #define	up_read(_rw)			sx_sunlock(&(_rw)->sx)
 #define	down_read_trylock(_rw)		!!sx_try_slock(&(_rw)->sx)
+#define	down_read_killable(_rw)		linux_down_read_killable(_rw)
 #define	down_write_trylock(_rw)		!!sx_try_xlock(&(_rw)->sx)
 #define	down_write_killable(_rw)	linux_down_write_killable(_rw)
 #define	downgrade_write(_rw)		sx_downgrade(&(_rw)->sx)
@@ -80,6 +81,7 @@
 	sx_init_flags(&rw->sx, name, SX_NOWITNESS);
 }
 
+extern int linux_down_read_killable(struct rw_semaphore *);
 extern int linux_down_write_killable(struct rw_semaphore *);
 
 #endif					/* _LINUXKPI_LINUX_RWSEM_H_ */
diff --git a/sys/compat/linuxkpi/common/src/linux_lock.c b/sys/compat/linuxkpi/common/src/linux_lock.c
--- a/sys/compat/linuxkpi/common/src/linux_lock.c
+++ b/sys/compat/linuxkpi/common/src/linux_lock.c
@@ -159,6 +159,19 @@
 	return (error);
 }
 
+int
+linux_down_read_killable(struct rw_semaphore *rw)
+{
+	int error;
+
+	error = -sx_slock_sig(&rw->sx);
+	if (error != 0) {
+		linux_schedule_save_interrupt_value(current, error);
+		error = -EINTR;
+	}
+	return (error);
+}
+
 int
 linux_down_write_killable(struct rw_semaphore *rw)
 {