[PATCH] Add and use new glibc-internal futex API in sparc code.

[Torvald Riegel]

This uses the futex API in the sparc-specific code.  It also cleans up
EINTR handling in the sparc semaphore code in that it follows the return
code documentation of futex_wait.

This applies on top of the patch with the new glibc-internal futex API:
https://sourceware.org/ml/libc-alpha/2015-06/msg00284.html

Not tested at all, but this is supposed to mirror the changes applied to
the generic code.

Dave, OK to commit provided the generic patch is committed?

2015-06-08  Torvald Riegel  <triegel@redhat.com>

	* sysdeps/sparc/nptl/pthread_barrier_wait.c (pthread_barrier_wait):
	Use futex wrappers with error checking.
	* sysdeps/sparc/sparc32/pthread_barrier_wait.c (pthread_barrier_wait):
	Likewise.
	* sysdeps/sparc/sparc32/sem_init.c (futex_private_if_supported): Remove.
	* sysdeps/sparc/sparc32/sem_post.c (futex_wake): Likewise.
	* sysdeps/sparc/sparc32/sem_open.c (sem_open): Use FUTEX_SHARED.
	* sysdeps/sparc/sparc32/sem_waitcommon.c (futex_abstimed_wait): Remove.
	(futex_wake): Likewise.
	(sem_assume_only_signals_cause_futex_EINTR): Likewise.
	(do_futex_wait): Use futex wrappers with error checking.
	(__new_sem_wait_slow): Update EINTR handling.
	* sysdeps/sparc/sparc32/sem_wait.c: Include lowlevellock.h.

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