This is a note to let you know that I've just added the patch titled
rcu: Export init_rcu_head() and destroy_rcu_head() to GPL modules
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rcu-export-init_rcu_head-and-destroy_rcu_head-to-gpl-modules.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 156baec39732f025dc778e00da95fc10d6e45885 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Date: Thu, 7 Dec 2017 09:40:38 -0800
Subject: rcu: Export init_rcu_head() and destroy_rcu_head() to GPL modules
From: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
commit 156baec39732f025dc778e00da95fc10d6e45885 upstream.
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 <Bart.VanAssche@xxxxxxx>
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/rcu/update.c | 2 ++
1 file changed, 2 insertions(+)
--- 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)
{
Patches currently in stable-queue which might be from paulmck@xxxxxxxxxxxxxxxxxx are
queue-4.15/rcu-export-init_rcu_head-and-destroy_rcu_head-to-gpl-modules.patch