From: Monam Agarwal Date: Sun, 23 Mar 2014 19:32:42 +0000 (+0530) Subject: crypto: nx - Use RCU_INIT_POINTER(x, NULL) X-Git-Tag: firefly_0821_release~176^2~3820^2~2^2~58 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7ded6e3d1bf5f83786753d1e0556a5c9711ced8a;p=firefly-linux-kernel-4.4.55.git crypto: nx - Use RCU_INIT_POINTER(x, NULL) This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL) The rcu_assign_pointer() ensures that the initialization of a structure is carried out before storing a pointer to that structure. And in the case of the NULL pointer, there is no structure to initialize. So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL) Signed-off-by: Monam Agarwal Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c index 1e5481d88a26..c4fcbf47475f 100644 --- a/drivers/crypto/nx/nx-842.c +++ b/drivers/crypto/nx/nx-842.c @@ -1234,7 +1234,7 @@ static int __exit nx842_remove(struct vio_dev *viodev) old_devdata = rcu_dereference_check(devdata, lockdep_is_held(&devdata_mutex)); of_reconfig_notifier_unregister(&nx842_of_nb); - rcu_assign_pointer(devdata, NULL); + RCU_INIT_POINTER(devdata, NULL); spin_unlock_irqrestore(&devdata_mutex, flags); synchronize_rcu(); dev_set_drvdata(&viodev->dev, NULL); @@ -1285,7 +1285,7 @@ static void __exit nx842_exit(void) spin_lock_irqsave(&devdata_mutex, flags); old_devdata = rcu_dereference_check(devdata, lockdep_is_held(&devdata_mutex)); - rcu_assign_pointer(devdata, NULL); + RCU_INIT_POINTER(devdata, NULL); spin_unlock_irqrestore(&devdata_mutex, flags); synchronize_rcu(); if (old_devdata)