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

This reverts commit e1c3bfe3 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: I9c672a97df39e7381e10c7cf113a5a36f76c90e4
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>