tree a7b49b135dc7703a4a709562178a847fb9bc4f77
parent 9b0fc9c09f1b262b7fe697eba6b05095d78850e5
author Michel Lespinasse <walken@google.com> 1367934358 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1367936416 -0700

rwsem: simplify __rwsem_do_wake

This is mostly for cleanup value:

- We don't need several gotos to handle the case where the first
  waiter is a writer. Two simple tests will do (and generate very
  similar code).

- In the remainder of the function, we know the first waiter is a reader,
  so we don't have to double check that. We can use do..while loops
  to iterate over the readers to wake (generates slightly better code).

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>