linux-kernel - [PATCH] compiler-gcc*.h: remove inaccurate comment about 'asm goto' miscompiles

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Message-Id: <1414274982-14040-1-git-send-email-steven@uplinklabs.net>
Date:	Sat, 25 Oct 2014 15:09:42 -0700
From:	Steven Noonan <steven@...inklabs.net>
To:	linux-kernel@...r.kernel.org
Cc:	Steven Noonan <steven@...inklabs.net>,
	Ingo Molnar <mingo@...nel.org>
Subject: [PATCH] compiler-gcc*.h: 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[1]. 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.

[1] https://lkml.org/lkml/2014/2/12/797
Signed-off-by: Steven Noonan <steven@...inklabs.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.)
  */
-- 
2.1.2

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