linux-kernel - [PATCH] kconfig: Centralize the selection of semaphore debugging in lib/Kconfig.debug.

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Date:	Wed, 21 Feb 2007 19:18:08 -0500 (EST)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
cc:	rth@...ddle.net
Subject: [PATCH] kconfig:  Centralize the selection of semaphore debugging
 in lib/Kconfig.debug.


  Remove the Kconfig selection of semaphore debugging from the ALPHA
and FRV Kconfig files, and centralize it in lib/Kconfig.debug.

Signed-off-by: Robert P. J. Day <rpjday@...dspring.com>

---

  there doesn't seem to be much point in letting individual
architectures independently define the same Kconfig option when it can
just as easily be put in a single Kconfig file and made dependent on a
subset of architectures.  that way, at least the option shows up in
the same relative location in the menu each time.

  not compile tested, but at least "make ARCH=??? menuconfig" tested.


 arch/alpha/Kconfig.debug    |    8 --------
 arch/frv/kernel/semaphore.c |    2 +-
 include/asm-frv/semaphore.h |   14 ++++++--------
 lib/Kconfig.debug           |   10 ++++++++++
 4 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/arch/alpha/Kconfig.debug b/arch/alpha/Kconfig.debug
index 36d0106..f45f28c 100644
--- a/arch/alpha/Kconfig.debug
+++ b/arch/alpha/Kconfig.debug
@@ -16,14 +16,6 @@ config DEBUG_RWLOCK
 	  too many attempts.  If you suspect a rwlock problem or a kernel
 	  hacker asks for this option then say Y.  Otherwise say N.

-config DEBUG_SEMAPHORE
-	bool "Semaphore debugging"
-	depends on DEBUG_KERNEL
-	help
-	  If you say Y here then semaphore processing will issue lots of
-	  verbose debugging messages.  If you suspect a semaphore problem or a
-	  kernel hacker asks for this option then say Y.  Otherwise say N.
-
 config ALPHA_LEGACY_START_ADDRESS
 	bool "Legacy kernel start address"
 	depends on ALPHA_GENERIC
diff --git a/arch/frv/kernel/semaphore.c b/arch/frv/kernel/semaphore.c
index f278cdf..8e182ce 100644
--- a/arch/frv/kernel/semaphore.c
+++ b/arch/frv/kernel/semaphore.c
@@ -19,7 +19,7 @@ struct sem_waiter {
 	struct task_struct	*task;
 };

-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 void semtrace(struct semaphore *sem, const char *str)
 {
 	if (sem->debug)
diff --git a/include/asm-frv/semaphore.h b/include/asm-frv/semaphore.h
index 907c5c3..0958652 100644
--- a/include/asm-frv/semaphore.h
+++ b/include/asm-frv/semaphore.h
@@ -20,8 +20,6 @@
 #include <linux/spinlock.h>
 #include <linux/rwsem.h>

-#define SEMAPHORE_DEBUG		0
-
 /*
  * the semaphore definition
  * - if counter is >0 then there are tokens available on the semaphore for down to collect
@@ -32,12 +30,12 @@ struct semaphore {
 	unsigned		counter;
 	spinlock_t		wait_lock;
 	struct list_head	wait_list;
-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 	unsigned		__magic;
 #endif
 };

-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 # define __SEM_DEBUG_INIT(name) , (long)&(name).__magic
 #else
 # define __SEM_DEBUG_INIT(name)
@@ -76,7 +74,7 @@ static inline void down(struct semaphore *sem)
 {
 	unsigned long flags;

-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 	CHECK_MAGIC(sem->__magic);
 #endif

@@ -95,7 +93,7 @@ static inline int down_interruptible(struct semaphore *sem)
 	unsigned long flags;
 	int ret = 0;

-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 	CHECK_MAGIC(sem->__magic);
 #endif

@@ -119,7 +117,7 @@ static inline int down_trylock(struct semaphore *sem)
 	unsigned long flags;
 	int success = 0;

-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 	CHECK_MAGIC(sem->__magic);
 #endif

@@ -136,7 +134,7 @@ static inline void up(struct semaphore *sem)
 {
 	unsigned long flags;

-#if SEMAPHORE_DEBUG
+#ifdef CONFIG_DEBUG_SEMAPHORE
 	CHECK_MAGIC(sem->__magic);
 #endif

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 3f3e740..16e1b81 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -201,6 +201,16 @@ config DEBUG_MUTEXES
 	 This feature allows mutex semantics violations to be detected and
 	 reported.

+config DEBUG_SEMAPHORE
+	bool "Semaphore debugging"
+	depends on DEBUG_KERNEL
+	depends on ALPHA || FRV
+	default n
+	help
+	  If you say Y here then semaphore processing will issue lots of
+	  verbose debugging messages.  If you suspect a semaphore problem or a
+	  kernel hacker asks for this option then say Y.  Otherwise say N.
+
 config DEBUG_LOCK_ALLOC
 	bool "Lock debugging: detect incorrect freeing of live locks"
 	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT

-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://fsdev.net/wiki/index.php?title=Main_Page
========================================================================
-
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