linux-kernel - [tip:core/urgent] compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles

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Date:	Tue, 28 Oct 2014 04:12:31 -0700
From:	tip-bot for Steven Noonan <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, steven@...inklabs.net, rostedt@...dmis.org,
	hpa@...or.com, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, rth@...ddle.net, tglx@...utronix.de,
	jakub@...hat.com
Subject: [tip:core/urgent] compiler/gcc4+:
  Remove inaccurate comment about 'asm goto' miscompiles

Commit-ID:  5631b8fba640a4ab2f8a954f63a603fa34eda96b
Gitweb:     http://git.kernel.org/tip/5631b8fba640a4ab2f8a954f63a603fa34eda96b
Author:     Steven Noonan <steven@...inklabs.net>
AuthorDate: Sat, 25 Oct 2014 15:09:42 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 28 Oct 2014 11:03:40 +0100

compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles

The bug referenced by the comment in this commit was not
completely fixed in GCC 4.8.2, as I mentioned in a thread back
in February:

   https://lkml.org/lkml/2014/2/12/797

The conclusion at that time was to make the quirk unconditional
until the bug could be found and fixed in GCC. Unfortunately,
when I submitted the patch (commit a9f18034) I left a comment
in that claimed the bug was fixed in GCC 4.8.2+.

This comment is inaccurate, and should be removed.

Signed-off-by: Steven Noonan <steven@...inklabs.net>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Jakub Jelinek <jakub@...hat.com>
Cc: Richard Henderson <rth@...ddle.net>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/r/1414274982-14040-1-git-send-email-steven@uplinklabs.net
Cc: Ingo Molnar <mingo@...nel.org>
---
 include/linux/compiler-gcc4.h | 1 -
 include/linux/compiler-gcc5.h | 1 -
 2 files changed, 2 deletions(-)

diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index 2507fd2..d1a5582 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -71,7 +71,6 @@
  *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  *
  * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
- * Fixed in GCC 4.8.2 and later versions.
  *
  * (asm goto is automatically volatile - the naming reflects this.)
  */
diff --git a/include/linux/compiler-gcc5.h b/include/linux/compiler-gcc5.h
index cdd1cc2..c8c5659 100644
--- a/include/linux/compiler-gcc5.h
+++ b/include/linux/compiler-gcc5.h
@@ -53,7 +53,6 @@
  *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
  *
  * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
- * Fixed in GCC 4.8.2 and later versions.
  *
  * (asm goto is automatically volatile - the naming reflects this.)
  */
--
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