Revert "perf: Avoid the read if the count is already updated"

This reverts commit 887e39ac which is
commit 8ce939a0 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I39e9126c8e78ae62d961dd9e3873d43b3b9e4498
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>