linux-kernel - [tip:x86/asm] debug: Avoid setting BUGFLAG

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Message-ID: <tip-f26dee15103f4040bfe21c910131db0cfe6624fc@git.kernel.org>
Date:   Fri, 14 Apr 2017 02:27:15 -0700
From:   tip-bot for Peter Zijlstra <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        dan.carpenter@...cle.com, hpa@...or.com, mingo@...nel.org,
        peterz@...radead.org, tglx@...utronix.de
Subject: [tip:x86/asm] debug: Avoid setting BUGFLAG_WARNING twice

Commit-ID:  f26dee15103f4040bfe21c910131db0cfe6624fc
Gitweb:     http://git.kernel.org/tip/f26dee15103f4040bfe21c910131db0cfe6624fc
Author:     Peter Zijlstra <peterz@...radead.org>
AuthorDate: Mon, 10 Apr 2017 10:49:39 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 14 Apr 2017 10:20:13 +0200

debug: Avoid setting BUGFLAG_WARNING twice

Dan reported that his static checking complains about BUGFLAG_WARNING
being set on both sides of the bitwise-or, it figures that that might've
been an unintentional mistake.

Since there are no architectures that implement __WARN_TAINT() (I
converted them all to implement __WARN_FLAGS()), and all __WARN_FLAGS()
implementations already set BUGFLAG_WARNING, we can remove the bit from
BUGFLAG_TAINT() and make Dan's checker happy.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20170410084939.4bwhrvpmauwfzauq@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/asm-generic/bug.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 5fe9f39..d6f4aed 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -7,7 +7,7 @@
 #define BUGFLAG_WARNING		(1 << 0)
 #define BUGFLAG_ONCE		(1 << 1)
 #define BUGFLAG_DONE		(1 << 2)
-#define BUGFLAG_TAINT(taint)	(BUGFLAG_WARNING | ((taint) << 8))
+#define BUGFLAG_TAINT(taint)	((taint) << 8)
 #define BUG_GET_TAINT(bug)	((bug)->flags >> 8)
 #endif