linux-kernel - [PATCH 22/21] lockdep: use stringify.h

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Date:	Thu, 29 Jan 2009 14:54:09 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org, npiggin@...e.de,
	Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 22/21] lockdep: use stringify.h

Subject: lockdep: use stringify.h
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Date: Thu Jan 29 14:50:36 CET 2009

Arnd pointed out we have the stringify macro magic already in-kernel.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC: Arnd Bergmann <arnd@...db.de>
---
 kernel/lockdep.c |   16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

Index: linux-2.6/kernel/lockdep.c
===================================================================
--- linux-2.6.orig/kernel/lockdep.c
+++ linux-2.6/kernel/lockdep.c
@@ -41,6 +41,7 @@
 #include <linux/utsname.h>
 #include <linux/hash.h>
 #include <linux/ftrace.h>
+#include <linux/stringify.h>
 
 #include <asm/sections.h>
 
@@ -445,14 +446,11 @@ atomic_t nr_find_usage_backwards_recursi
  * Locking printouts:
  */
 
-#define __STR(foo)	#foo
-#define STR(foo)	__STR(foo)
-
 #define __USAGE(__STATE)						\
-	[LOCK_USED_IN_##__STATE] = "IN-"STR(__STATE)"-W",		\
-	[LOCK_ENABLED_##__STATE] = STR(__STATE)"-ON-W",			\
-	[LOCK_USED_IN_##__STATE##_READ] = "IN-"STR(__STATE)"-R",	\
-	[LOCK_ENABLED_##__STATE##_READ] = STR(__STATE)"-ON-R",
+	[LOCK_USED_IN_##__STATE] = "IN-"__stringify(__STATE)"-W",	\
+	[LOCK_ENABLED_##__STATE] = __stringify(__STATE)"-ON-W",		\
+	[LOCK_USED_IN_##__STATE##_READ] = "IN-"__stringify(__STATE)"-R",\
+	[LOCK_ENABLED_##__STATE##_READ] = __stringify(__STATE)"-ON-R",
 
 static const char *usage_str[] =
 {
@@ -1270,14 +1268,14 @@ check_usage(struct task_struct *curr, st
 
 static const char *state_names[] = {
 #define LOCKDEP_STATE(__STATE) \
-	STR(__STATE),
+	__stringify(__STATE),
 #include "lockdep_states.h"
 #undef LOCKDEP_STATE
 };
 
 static const char *state_rnames[] = {
 #define LOCKDEP_STATE(__STATE) \
-	STR(__STATE)"-READ",
+	__stringify(__STATE)"-READ",
 #include "lockdep_states.h"
 #undef LOCKDEP_STATE
 };


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