drivers/scsi: Replace rcu_swap_protected() with rcu_replace_pointer()

This commit replaces the use of rcu_swap_protected() with the more
intuitively appealing rcu_replace_pointer() as a step towards removing
rcu_swap_protected().

Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@mail.gmail.com/
Reported-by: Linus Torvalds <[email protected]>
[ paulmck: From rcu_replace() to rcu_replace_pointer() per Ingo Molnar. ]
Signed-off-by: Paul E. McKenney <[email protected]>
Acked-by: "Martin K. Petersen" <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>

Author: paulmckrcu

drivers/scsi/scsi.c

@@ -434,8 +434,8 @@ static void scsi_update_vpd_page(struct scsi_device *sdev, u8 page,
 		return;
 
 	mutex_lock(&sdev->inquiry_mutex);
-	rcu_swap_protected(*sdev_vpd_buf, vpd_buf,
-			   lockdep_is_held(&sdev->inquiry_mutex));
+	vpd_buf = rcu_replace_pointer(*sdev_vpd_buf, vpd_buf,
+				      lockdep_is_held(&sdev->inquiry_mutex));
 	mutex_unlock(&sdev->inquiry_mutex);
 
 	if (vpd_buf)

drivers/scsi/scsi_sysfs.c

@@ -466,10 +466,10 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
 	sdev->request_queue = NULL;
 
 	mutex_lock(&sdev->inquiry_mutex);
-	rcu_swap_protected(sdev->vpd_pg80, vpd_pg80,
-			   lockdep_is_held(&sdev->inquiry_mutex));
-	rcu_swap_protected(sdev->vpd_pg83, vpd_pg83,
-			   lockdep_is_held(&sdev->inquiry_mutex));
+	vpd_pg80 = rcu_replace_pointer(sdev->vpd_pg80, vpd_pg80,
+				       lockdep_is_held(&sdev->inquiry_mutex));
+	vpd_pg83 = rcu_replace_pointer(sdev->vpd_pg83, vpd_pg83,
+				       lockdep_is_held(&sdev->inquiry_mutex));
 	mutex_unlock(&sdev->inquiry_mutex);
 
 	if (vpd_pg83)