[tip: core/rcu] rcu: Remove rcu_swap_protected()

[tip-bot2 for Paul E. McKenney]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     4414abf89158d734a83c99f6504f648417bd9550
Gitweb:        https://git.kernel.org/tip/4414abf89158d734a83c99f6504f648417bd9550
Author:        Paul E. McKenney <paulmck@xxxxxxxxxx>
AuthorDate:    Mon, 23 Sep 2019 16:31:42 -07:00
Committer:     Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Thu, 12 Dec 2019 10:24:52 -08:00

rcu: Remove rcu_swap_protected()

Now that the calls to rcu_swap_protected() have been replaced by
rcu_replace_pointer(), this commit removes rcu_swap_protected().

Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@xxxxxxxxxxxxxx/
Reported-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Cc: Bart Van Assche <bart.vanassche@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Johannes Thumshirn <jthumshirn@xxxxxxx>
Cc: Shane M Seymour <shane.seymour@xxxxxxx>
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
---
 include/linux/rcupdate.h | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 0b75063..fe47024 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -401,22 +401,6 @@ do {									      \
 })
 
 /**
- * rcu_swap_protected() - swap an RCU and a regular pointer
- * @rcu_ptr: RCU pointer
- * @ptr: regular pointer
- * @c: the conditions under which the dereference will take place
- *
- * Perform swap(@rcu_ptr, @ptr) where @rcu_ptr is an RCU-annotated pointer and
- * @c is the argument that is passed to the rcu_dereference_protected() call
- * used to read that pointer.
- */
-#define rcu_swap_protected(rcu_ptr, ptr, c) do {			\
-	typeof(ptr) __tmp = rcu_dereference_protected((rcu_ptr), (c));	\
-	rcu_assign_pointer((rcu_ptr), (ptr));				\
-	(ptr) = __tmp;							\
-} while (0)
-
-/**
  * rcu_access_pointer() - fetch RCU pointer with no dereferencing
  * @p: The pointer to read
  *