UPSTREAM: locking: avoid passing around 'thread_info' in mutex debugging code

commit 6720a305df74ca30bcc10fc316881641b6ff0c80 upstream.

None of the code actually wants a thread_info, it all wants a
task_struct, and it's just converting back and forth between the two
("ti->task" to get the task_struct from the thread_info, and
"task_thread_info(task)" to go the other way).

No semantic change.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Change-Id: Idd7d0fe0b2b57ece9a969d178576a12f3ae90701
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>