The documentation was misleading, as for a lot of use-cases holding the RCU read side lock is sufficient.
Signed-off-by: Lucas Stach l.stach@pengutronix.de --- include/linux/reservation.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/reservation.h b/include/linux/reservation.h index 21fc84d82d41..ae1175e5997c 100644 --- a/include/linux/reservation.h +++ b/include/linux/reservation.h @@ -204,7 +204,8 @@ reservation_object_unlock(struct reservation_object *obj) * @obj: the reservation object * * Returns the exclusive fence (if any). Does NOT take a - * reference. The obj->lock must be held. + * reference. Writers must hold obj->lock, readers may only + * hold a RCU read side lock. * * RETURNS * The exclusive fence or NULL