rcu: Change EXPORT_SYMBOL() to EXPORT_SYMBOL_GPL()
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Sun, 8 Sep 2013 18:51:06 +0000 (11:51 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Wed, 25 Sep 2013 13:44:56 +0000 (06:44 -0700)
commitf9ffc31ebd38d2d74dbfe9f0b67274e99ad668f5
treeeb6d7441e41646201b767cfc638afa18c59c81c5
parentcc6783f788d8fe8b23ec6fc2762f5e8c9a418eee
rcu: Change EXPORT_SYMBOL() to EXPORT_SYMBOL_GPL()

Commit e6b80a3b (rcu: Detect illegal rcu dereference in extended
quiescent state) exported the pre-existing rcu_is_cpu_idle() function
using EXPORT_SYMBOL().  However, this is inconsistent with the remaining
exports from RCU, which are all EXPORT_SYMBOL_GPL().  The current state
of affairs means that a non-GPL module could use rcu_is_cpu_idle(),
but in a CONFIG_TREE_PREEMPT_RCU=y kernel would be unable to invoke
rcu_read_lock() and rcu_read_unlock().

This commit therefore makes rcu_is_cpu_idle()'s export be consistent
with the rest of RCU, namely EXPORT_SYMBOL_GPL().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
kernel/rcutree.c