[RFC 5/5] rcuwait: Replace rcu_assign_pointer with smp_store_release

[Joel Fernandes (Google)]

From: Joel Fernandes <j...@joelfernandes.org>

This suppresses a sparse error generated to the recently added
rcu_assign_pointer sparse check:

>> kernel//locking/percpu-rwsem.c:162:9: sparse: error: incompatible
types in comparison expression (different address spaces)

Signed-off-by: Joel Fernandes <j...@joelfernandes.org>
---
 include/linux/rcuwait.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rcuwait.h b/include/linux/rcuwait.h
index 90bfa3279a01..da613efee45c 100644
--- a/include/linux/rcuwait.h
+++ b/include/linux/rcuwait.h
@@ -44,7 +44,7 @@ extern void rcuwait_wake_up(struct rcuwait *w);
         */                                                             \
        WARN_ON(current->exit_state);                                   \
                                                                        \
-       rcu_assign_pointer((w)->task, current);                         \
+       smp_store_release(&((w)->task), current);                       \
        for (;;) {                                                      \
                /*                                                      \
                 * Implicit barrier (A) pairs with (B) in               \
-- 
2.21.0.rc0.258.g878e2cd30e-goog