rcu: Export init_rcu_head() and destroy_rcu_head() to GPL modules

Use of init_rcu_head() and destroy_rcu_head() from modules results in the following build-time error with CONFIG_DEBUG_OBJECTS_RCU_HEAD=y: ERROR: "init_rcu_head" [drivers/scsi/scsi_mod.ko] undefined! ERROR: "destroy_rcu_head" [drivers/scsi/scsi_mod.ko] undefined! This commit therefore adds EXPORT_SYMBOL_GPL() for each to allow them to be used by GPL-licensed kernel modules. Reported-by: Bart Van Assche <[email protected]> Reported-by: Stephen Rothwell <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]>
anholt · Dec 8, 2017 · 156baec · 156baec
1 parent fa576b4
commit 156baec
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
@@ -422,11 +422,13 @@ void init_rcu_head(struct rcu_head *head)
 {
 	debug_object_init(head, &rcuhead_debug_descr);
 }
+EXPORT_SYMBOL_GPL(init_rcu_head);
 
 void destroy_rcu_head(struct rcu_head *head)
 {
 	debug_object_free(head, &rcuhead_debug_descr);
 }
+EXPORT_SYMBOL_GPL(destroy_rcu_head);
 
 static bool rcuhead_is_static_object(void *addr)
 {