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libgo patch committed: Remove unnecessary Entersyscall (RMs: OK for GCC 5 branch?)

From: Ian Lance Taylor <iant at golang dot org>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, "gofrontend-dev at googlegroups dot com" <gofrontend-dev at googlegroups dot com>
Cc: Lynn Boger <laboger at linux dot vnet dot ibm dot com>
Date: Mon, 13 Jul 2015 11:55:41 -0700
Subject: libgo patch committed: Remove unnecessary Entersyscall (RMs: OK for GCC 5 branch?)
Authentication-results: sourceware.org; auth=none

This patch by Lynn Boger removes unnecessary duplicate calls to
Entersyscall and Exitsyscall from the GNU/Linux Getdents function.
The calls are duplicates because they are called by Syscall, also
called by Getdents.  These duplicate calls sometimes cause the
deadlock detector to fire incorrectly, reported as
http://golang.org/issue/11406 .  This patch fixes that problem.
Bootstrapped and ran Go tests on mainline, GCC 4.9 branch, and GCC 5
branch.  Committed to mainline and 4.9 branch.

Release managers: OK to commit to GCC 5 branch?

Ian

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Follow-Ups:
- Re: libgo patch committed: Remove unnecessary Entersyscall (RMs: OK for GCC 5 branch?)
  - From: Richard Biener

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