UPSTREAM: rcu/sync: Use call_rcu_hurry() instead of call_rcu

call_rcu() changes to save power will slow down rcu sync. Use the
call_rcu_hurry() API instead which reverts to the old behavior.

[ paulmck: Apply s/call_rcu_flush/call_rcu_hurry/ feedback from Tejun Heo. ]

Bug: 258241771
Bug: 222463781
Test: CQ
Change-Id: I5123ba52f47676305dbcfa1233bf3b41f140766c
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
(cherry picked from commit 7651d6b2)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/4318048


Reviewed-by: Sean Paul <sean@poorly.run>
Commit-Queue: Joel Fernandes <joelaf@google.com>
Reviewed-by: Vineeth Pillai <vineethrp@google.com>
Tested-by: Joel Fernandes <joelaf@google.com>
(cherry picked from commit 183fce4e1bfbbae1266ec90c6bb871b51d7af81c)
[Cherry picked from chromeos-5.15 tree. Minor tweaks to commit message
to match Android style]
Signed-off-by: Qais Yousef <qyousef@google.com>