sh: stacktrace/lockdep/irqflags tracing support.

Wire up all of the essentials for lockdep..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 150 insertions, 101 deletions

diff --git a/include/asm-sh/irqflags.h b/include/asm-sh/irqflags.h
new file mode 100644
index 00000000000..9dedc1b693e
--- /dev/null
+++ b/include/asm-sh/irqflags.h
@@ -0,0 +1,123 @@
+#ifndef __ASM_SH_IRQFLAGS_H
+#define __ASM_SH_IRQFLAGS_H
+
+static inline void raw_local_irq_enable(void)
+{
+	unsigned long __dummy0, __dummy1;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"and	%1, %0\n\t"
+#ifdef CONFIG_CPU_HAS_SR_RB
+		"stc	r6_bank, %1\n\t"
+		"or	%1, %0\n\t"
+#endif
+		"ldc	%0, sr\n\t"
+		: "=&r" (__dummy0), "=r" (__dummy1)
+		: "1" (~0x000000f0)
+		: "memory"
+	);
+}
+
+static inline void raw_local_irq_disable(void)
+{
+	unsigned long flags;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"or	#0xf0, %0\n\t"
+		"ldc	%0, sr\n\t"
+		: "=&z" (flags)
+		: /* no inputs */
+		: "memory"
+	);
+}
+
+static inline void set_bl_bit(void)
+{
+	unsigned long __dummy0, __dummy1;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"or	%2, %0\n\t"
+		"and	%3, %0\n\t"
+		"ldc	%0, sr\n\t"
+		: "=&r" (__dummy0), "=r" (__dummy1)
+		: "r" (0x10000000), "r" (0xffffff0f)
+		: "memory"
+	);
+}
+
+static inline void clear_bl_bit(void)
+{
+	unsigned long __dummy0, __dummy1;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"and	%2, %0\n\t"
+		"ldc	%0, sr\n\t"
+		: "=&r" (__dummy0), "=r" (__dummy1)
+		: "1" (~0x10000000)
+		: "memory"
+	);
+}
+
+static inline unsigned long __raw_local_save_flags(void)
+{
+	unsigned long flags;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"and	#0xf0, %0\n\t"
+		: "=&z" (flags)
+		: /* no inputs */
+		: "memory"
+	);
+
+	return flags;
+}
+
+#define raw_local_save_flags(flags) \
+		do { (flags) = __raw_local_save_flags(); } while (0)
+
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+	return (flags != 0);
+}
+
+static inline int raw_irqs_disabled(void)
+{
+	unsigned long flags = __raw_local_save_flags();
+
+	return raw_irqs_disabled_flags(flags);
+}
+
+static inline unsigned long __raw_local_irq_save(void)
+{
+	unsigned long flags, __dummy;
+
+	__asm__ __volatile__ (
+		"stc	sr, %1\n\t"
+		"mov	%1, %0\n\t"
+		"or	#0xf0, %0\n\t"
+		"ldc	%0, sr\n\t"
+		"mov	%1, %0\n\t"
+		"and	#0xf0, %0\n\t"
+		: "=&z" (flags), "=&r" (__dummy)
+		: /* no inputs */
+		: "memory"
+	);
+
+	return flags;
+}
+
+#define raw_local_irq_save(flags) \
+		do { (flags) = __raw_local_irq_save(); } while (0)
+
+static inline void raw_local_irq_restore(unsigned long flags)
+{
+	if ((flags & 0xf0) != 0xf0)
+		raw_local_irq_enable();
+}
+
+#endif /* __ASM_SH_IRQFLAGS_H */
diff --git a/include/asm-sh/rwsem.h b/include/asm-sh/rwsem.h
index 9d2aea5e848..4931ba817d7 100644
--- a/include/asm-sh/rwsem.h
+++ b/include/asm-sh/rwsem.h
@@ -25,11 +25,21 @@ struct rw_semaphore {
 #define RWSEM_ACTIVE_WRITE_BIAS		(RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
 	spinlock_t		wait_lock;
 	struct list_head	wait_list;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lockdep_map	dep_map;
+#endif
 };
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
+#else
+# define __RWSEM_DEP_MAP_INIT(lockname)
+#endif
+
 #define __RWSEM_INITIALIZER(name) \
 	{ RWSEM_UNLOCKED_VALUE, SPIN_LOCK_UNLOCKED, \
-	  LIST_HEAD_INIT((name).wait_list) }
+	  LIST_HEAD_INIT((name).wait_list) \
+	  __RWSEM_DEP_MAP_INIT(name) }
 
 #define DECLARE_RWSEM(name)		\
 	struct rw_semaphore name = __RWSEM_INITIALIZER(name)
@@ -39,6 +49,16 @@ extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
 extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem);
 extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
 
+extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
+			 struct lock_class_key *key);
+
+#define init_rwsem(sem)				\
+do {						\
+	static struct lock_class_key __key;	\
+						\
+	__init_rwsem((sem), #sem, &__key);	\
+} while (0)
+
 static inline void init_rwsem(struct rw_semaphore *sem)
 {
 	sem->count = RWSEM_UNLOCKED_VALUE;
@@ -141,6 +161,11 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
 		rwsem_downgrade_wake(sem);
 }
 
+static inline void __down_write_nested(struct rw_semaphore *sem, int subclass)
+{
+	__down_write(sem);
+}
+
 /*
  * implement exchange and add functionality
  */
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index 3340126f4e0..b1e42e7f998 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -6,6 +6,7 @@
  * Copyright (C) 2002 Paul Mundt
  */
 
+#include <linux/irqflags.h>
 #include <asm/types.h>
 
 /*
@@ -131,103 +132,6 @@ static inline unsigned long tas(volatile int *m)
 
 #define set_mb(var, value) do { xchg(&var, value); } while (0)
 
-/* Interrupt Control */
-#ifdef CONFIG_CPU_HAS_SR_RB
-static inline void local_irq_enable(void)
-{
-	unsigned long __dummy0, __dummy1;
-
-	__asm__ __volatile__("stc	sr, %0\n\t"
-			     "and	%1, %0\n\t"
-			     "stc	r6_bank, %1\n\t"
-			     "or	%1, %0\n\t"
-			     "ldc	%0, sr"
-			     : "=&r" (__dummy0), "=r" (__dummy1)
-			     : "1" (~0x000000f0)
-			     : "memory");
-}
-#else
-static inline void local_irq_enable(void)
-{
-	unsigned long __dummy0, __dummy1;
-
-	__asm__ __volatile__ (
-		"stc	sr, %0\n\t"
-		"and	%1, %0\n\t"
-		"ldc	%0, sr\n\t"
-		: "=&r" (__dummy0), "=r" (__dummy1)
-		: "1" (~0x000000f0)
-		: "memory");
-}
-#endif
-
-static inline void local_irq_disable(void)
-{
-	unsigned long __dummy;
-	__asm__ __volatile__("stc	sr, %0\n\t"
-			     "or	#0xf0, %0\n\t"
-			     "ldc	%0, sr"
-			     : "=&z" (__dummy)
-			     : /* no inputs */
-			     : "memory");
-}
-
-static inline void set_bl_bit(void)
-{
-	unsigned long __dummy0, __dummy1;
-
-	__asm__ __volatile__ ("stc	sr, %0\n\t"
-			     "or	%2, %0\n\t"
-			     "and	%3, %0\n\t"
-			     "ldc	%0, sr"
-			     : "=&r" (__dummy0), "=r" (__dummy1)
-			     : "r" (0x10000000), "r" (0xffffff0f)
-			     : "memory");
-}
-
-static inline void clear_bl_bit(void)
-{
-	unsigned long __dummy0, __dummy1;
-
-	__asm__ __volatile__ ("stc	sr, %0\n\t"
-			     "and	%2, %0\n\t"
-			     "ldc	%0, sr"
-			     : "=&r" (__dummy0), "=r" (__dummy1)
-			     : "1" (~0x10000000)
-			     : "memory");
-}
-
-#define local_save_flags(x) \
-	__asm__("stc sr, %0; and #0xf0, %0" : "=&z" (x) :/**/: "memory" )
-
-#define irqs_disabled()			\
-({					\
-	unsigned long flags;		\
-	local_save_flags(flags);	\
-	(flags != 0);			\
-})
-
-static inline unsigned long local_irq_save(void)
-{
-	unsigned long flags, __dummy;
-
-	__asm__ __volatile__("stc	sr, %1\n\t"
-			     "mov	%1, %0\n\t"
-			     "or	#0xf0, %0\n\t"
-			     "ldc	%0, sr\n\t"
-			     "mov	%1, %0\n\t"
-			     "and	#0xf0, %0"
-			     : "=&z" (flags), "=&r" (__dummy)
-			     :/**/
-			     : "memory" );
-	return flags;
-}
-
-#define local_irq_restore(x) do {			\
-	if ((x & 0x000000f0) != 0x000000f0)		\
-		local_irq_enable();			\
-} while (0)
-
 /*
  * Jump to P2 area.
  * When handling TLB or caches, we need to do it from P2 area.
@@ -264,9 +168,6 @@ do {							\
 		: "=&r" (__dummy));			\
 } while (0)
 
-/* For spinlocks etc */
-#define local_irq_save(x)	x = local_irq_save()
-
 static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
 {
 	unsigned long flags, retval;