linux-kernel - [PATCHv1, RFC 01/33] tools: Add WARN_ON

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Message-Id: <1469493335-3622-2-git-send-email-kirill.shutemov@linux.intel.com>
Date:	Tue, 26 Jul 2016 03:35:03 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Jan Kara <jack@...e.com>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Hugh Dickins <hughd@...gle.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Matthew Wilcox <willy@...radead.org>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-block@...r.kernel.org,
	Matthew Wilcox <willy@...ux.intel.com>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv1, RFC 01/33] tools: Add WARN_ON_ONCE

From: Matthew Wilcox <willy@...ux.intel.com>

The radix tree uses its own buggy WARN_ON_ONCE.  Replace it with the
definition from asm-generic/bug.h

Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 tools/include/asm/bug.h              | 11 +++++++++++
 tools/testing/radix-tree/Makefile    |  2 +-
 tools/testing/radix-tree/linux/bug.h |  2 +-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/include/asm/bug.h b/tools/include/asm/bug.h
index 9e5f4846967f..beda1a884b50 100644
--- a/tools/include/asm/bug.h
+++ b/tools/include/asm/bug.h
@@ -12,6 +12,17 @@
 	unlikely(__ret_warn_on);		\
 })
 
+#define WARN_ON_ONCE(condition) ({			\
+	static int __warned;				\
+	int __ret_warn_once = !!(condition);		\
+							\
+	if (unlikely(__ret_warn_once && !__warned)) {	\
+		__warned = true;			\
+		WARN_ON(1);				\
+	}						\
+	unlikely(__ret_warn_once);			\
+})
+
 #define WARN_ONCE(condition, format...)	({	\
 	static int __warned;			\
 	int __ret_warn_once = !!(condition);	\
diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile
index 3b530467148e..20d8bb37017a 100644
--- a/tools/testing/radix-tree/Makefile
+++ b/tools/testing/radix-tree/Makefile
@@ -1,5 +1,5 @@
 
-CFLAGS += -I. -g -Wall -D_LGPL_SOURCE
+CFLAGS += -I. -I../../include -g -Wall -D_LGPL_SOURCE
 LDFLAGS += -lpthread -lurcu
 TARGETS = main
 OFILES = main.o radix-tree.o linux.o test.o tag_check.o find_next_bit.o \
diff --git a/tools/testing/radix-tree/linux/bug.h b/tools/testing/radix-tree/linux/bug.h
index ccbe444977df..23b8ed52f8c8 100644
--- a/tools/testing/radix-tree/linux/bug.h
+++ b/tools/testing/radix-tree/linux/bug.h
@@ -1 +1 @@
-#define WARN_ON_ONCE(x)		assert(x)
+#include "asm/bug.h"
-- 
2.8.1