rcu: Replace this_cpu_ptr() with __this_cpu_read()

Because __this_cpu_read() can be lighter weight than equivalent uses of
this_cpu_ptr(), this commit replaces the latter with the former.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-11-05 14:20:57 -08:00
commit 117f683c6e