[PATCH] spinlock consolidation

This patch (written by me and also containing many suggestions of Arjan van
de Ven) does a major cleanup of the spinlock code.  It does the following
things:

 - consolidates and enhances the spinlock/rwlock debugging code

 - simplifies the asm/spinlock.h files

 - encapsulates the raw spinlock type and moves generic spinlock
   features (such as ->break_lock) into the generic code.

 - cleans up the spinlock code hierarchy to get rid of the spaghetti.

Most notably there's now only a single variant of the debugging code,
located in lib/spinlock_debug.c.  (previously we had one SMP debugging
variant per architecture, plus a separate generic one for UP builds)

Also, i've enhanced the rwlock debugging facility, it will now track
write-owners.  There is new spinlock-owner/CPU-tracking on SMP builds too.
All locks have lockup detection now, which will work for both soft and hard
spin/rwlock lockups.

The arch-level include files now only contain the minimally necessary
subset of the spinlock code - all the rest that can be generalized now
lives in the generic headers:

 include/asm-i386/spinlock_types.h       |   16
 include/asm-x86_64/spinlock_types.h     |   16

I have also split up the various spinlock variants into separate files,
making it easier to see which does what. The new layout is:

   SMP                         |  UP
   ----------------------------|-----------------------------------
   asm/spinlock_types_smp.h    |  linux/spinlock_types_up.h
   linux/spinlock_types.h      |  linux/spinlock_types.h
   asm/spinlock_smp.h          |  linux/spinlock_up.h
   linux/spinlock_api_smp.h    |  linux/spinlock_api_up.h
   linux/spinlock.h            |  linux/spinlock.h

/*
 * here's the role of the various spinlock/rwlock related include files:
 *
 * on SMP builds:
 *
 *  asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the
 *                        initializers
 *
 *  linux/spinlock_types.h:
 *                        defines the generic type and initializers
 *
 *  asm/spinlock.h:       contains the __raw_spin_*()/etc. lowlevel
 *                        implementations, mostly inline assembly code
 *
 *   (also included on UP-debug builds:)
 *
 *  linux/spinlock_api_smp.h:
 *                        contains the prototypes for the _spin_*() APIs.
 *
 *  linux/spinlock.h:     builds the final spin_*() APIs.
 *
 * on UP builds:
 *
 *  linux/spinlock_type_up.h:
 *                        contains the generic, simplified UP spinlock type.
 *                        (which is an empty structure on non-debug builds)
 *
 *  linux/spinlock_types.h:
 *                        defines the generic type and initializers
 *
 *  linux/spinlock_up.h:
 *                        contains the __raw_spin_*()/etc. version of UP
 *                        builds. (which are NOPs on non-debug, non-preempt
 *                        builds)
 *
 *   (included on UP-non-debug builds:)
 *
 *  linux/spinlock_api_up.h:
 *                        builds the _spin_*() APIs.
 *
 *  linux/spinlock.h:     builds the final spin_*() APIs.
 */

All SMP and UP architectures are converted by this patch.

arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via
crosscompilers.  m32r, mips, sh, sparc, have not been tested yet, but should
be mostly fine.

From: Grant Grundler <grundler@parisc-linux.org>

  Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU).
  Builds 32-bit SMP kernel (not booted or tested).  I did not try to build
  non-SMP kernels.  That should be trivial to fix up later if necessary.

  I converted bit ops atomic_hash lock to raw_spinlock_t.  Doing so avoids
  some ugly nesting of linux/*.h and asm/*.h files.  Those particular locks
  are well tested and contained entirely inside arch specific code.  I do NOT
  expect any new issues to arise with them.

 If someone does ever need to use debug/metrics with them, then they will
  need to unravel this hairball between spinlocks, atomic ops, and bit ops
  that exist only because parisc has exactly one atomic instruction: LDCW
  (load and clear word).

From: "Luck, Tony" <tony.luck@intel.com>

   ia64 fix

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjanv@infradead.org>
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Cc: Matthew Wilcox <willy@debian.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se>
Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

41 files changed, 1289 insertions, 1723 deletions

diff --git a/include/asm-alpha/spinlock.h b/include/asm-alpha/spinlock.h
index 80780dba998..8197c69eff4 100644
--- a/include/asm-alpha/spinlock.h
+++ b/include/asm-alpha/spinlock.h
@@ -6,7 +6,6 @@
 #include <linux/kernel.h>
 #include <asm/current.h>
 
-
 /*
  * Simple spin lock operations.  There are two variants, one clears IRQ's
  * on the local processor, one does not.
@@ -14,43 +13,18 @@
  * We make no fairness assumptions. They have a cost.
  */
 
-typedef struct {
-	volatile unsigned int lock;
-#ifdef CONFIG_DEBUG_SPINLOCK
-	int on_cpu;
-	int line_no;
-	void *previous;
-	struct task_struct * task;
-	const char *base_file;
-#endif
-} spinlock_t;
-
-#ifdef CONFIG_DEBUG_SPINLOCK
-#define SPIN_LOCK_UNLOCKED	(spinlock_t){ 0, -1, 0, NULL, NULL, NULL }
-#else
-#define SPIN_LOCK_UNLOCKED	(spinlock_t){ 0 }
-#endif
-
-#define spin_lock_init(x)	do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
-#define spin_is_locked(x)	((x)->lock != 0)
-#define spin_unlock_wait(x)	do { barrier(); } while ((x)->lock)
-
-#ifdef CONFIG_DEBUG_SPINLOCK
-extern void _raw_spin_unlock(spinlock_t * lock);
-extern void debug_spin_lock(spinlock_t * lock, const char *, int);
-extern int debug_spin_trylock(spinlock_t * lock, const char *, int);
-#define _raw_spin_lock(LOCK) \
-	debug_spin_lock(LOCK, __BASE_FILE__, __LINE__)
-#define _raw_spin_trylock(LOCK) \
-	debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__)
-#else
-static inline void _raw_spin_unlock(spinlock_t * lock)
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
+#define __raw_spin_is_locked(x)	((x)->lock != 0)
+#define __raw_spin_unlock_wait(x) \
+		do { cpu_relax(); } while ((x)->lock)
+
+static inline void __raw_spin_unlock(raw_spinlock_t * lock)
 {
 	mb();
 	lock->lock = 0;
 }
 
-static inline void _raw_spin_lock(spinlock_t * lock)
+static inline void __raw_spin_lock(raw_spinlock_t * lock)
 {
 	long tmp;
 
@@ -70,80 +44,64 @@ static inline void _raw_spin_lock(spinlock_t * lock)
 	: "m"(lock->lock) : "memory");
 }
 
-static inline int _raw_spin_trylock(spinlock_t *lock)
+static inline int __raw_spin_trylock(raw_spinlock_t *lock)
 {
 	return !test_and_set_bit(0, &lock->lock);
 }
-#endif /* CONFIG_DEBUG_SPINLOCK */
-
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
 
 /***********************************************************/
 
-typedef struct {
-	volatile unsigned int lock;
-} rwlock_t;
-
-#define RW_LOCK_UNLOCKED	(rwlock_t){ 0 }
-
-#define rwlock_init(x)		do { *(x) = RW_LOCK_UNLOCKED; } while(0)
-
-static inline int read_can_lock(rwlock_t *lock)
+static inline int __raw_read_can_lock(raw_rwlock_t *lock)
 {
 	return (lock->lock & 1) == 0;
 }
 
-static inline int write_can_lock(rwlock_t *lock)
+static inline int __raw_write_can_lock(raw_rwlock_t *lock)
 {
 	return lock->lock == 0;
 }
 
-#ifdef CONFIG_DEBUG_RWLOCK
-extern void _raw_write_lock(rwlock_t * lock);
-extern void _raw_read_lock(rwlock_t * lock);
-#else
-static inline void _raw_write_lock(rwlock_t * lock)
+static inline void __raw_read_lock(raw_rwlock_t *lock)
 {
 	long regx;
 
 	__asm__ __volatile__(
 	"1:	ldl_l	%1,%0\n"
-	"	bne	%1,6f\n"
-	"	lda	%1,1\n"
+	"	blbs	%1,6f\n"
+	"	subl	%1,2,%1\n"
 	"	stl_c	%1,%0\n"
 	"	beq	%1,6f\n"
 	"	mb\n"
 	".subsection 2\n"
 	"6:	ldl	%1,%0\n"
-	"	bne	%1,6b\n"
+	"	blbs	%1,6b\n"
 	"	br	1b\n"
 	".previous"
 	: "=m" (*lock), "=&r" (regx)
 	: "m" (*lock) : "memory");
 }
 
-static inline void _raw_read_lock(rwlock_t * lock)
+static inline void __raw_write_lock(raw_rwlock_t *lock)
 {
 	long regx;
 
 	__asm__ __volatile__(
 	"1:	ldl_l	%1,%0\n"
-	"	blbs	%1,6f\n"
-	"	subl	%1,2,%1\n"
+	"	bne	%1,6f\n"
+	"	lda	%1,1\n"
 	"	stl_c	%1,%0\n"
 	"	beq	%1,6f\n"
 	"	mb\n"
 	".subsection 2\n"
 	"6:	ldl	%1,%0\n"
-	"	blbs	%1,6b\n"
+	"	bne	%1,6b\n"
 	"	br	1b\n"
 	".previous"
 	: "=m" (*lock), "=&r" (regx)
 	: "m" (*lock) : "memory");
 }
-#endif /* CONFIG_DEBUG_RWLOCK */
 
-static inline int _raw_read_trylock(rwlock_t * lock)
+static inline int __raw_read_trylock(raw_rwlock_t * lock)
 {
 	long regx;
 	int success;
@@ -165,7 +123,7 @@ static inline int _raw_read_trylock(rwlock_t * lock)
 	return success;
 }
 
-static inline int _raw_write_trylock(rwlock_t * lock)
+static inline int __raw_write_trylock(raw_rwlock_t * lock)
 {
 	long regx;
 	int success;
@@ -187,13 +145,7 @@ static inline int _raw_write_trylock(rwlock_t * lock)
 	return success;
 }
 
-static inline void _raw_write_unlock(rwlock_t * lock)
-{
-	mb();
-	lock->lock = 0;
-}
-
-static inline void _raw_read_unlock(rwlock_t * lock)
+static inline void __raw_read_unlock(raw_rwlock_t * lock)
 {
 	long regx;
 	__asm__ __volatile__(
@@ -209,4 +161,10 @@ static inline void _raw_read_unlock(rwlock_t * lock)
 	: "m" (*lock) : "memory");
 }
 
+static inline void __raw_write_unlock(raw_rwlock_t * lock)
+{
+	mb();
+	lock->lock = 0;
+}
+
 #endif /* _ALPHA_SPINLOCK_H */
diff --git a/include/asm-alpha/spinlock_types.h b/include/asm-alpha/spinlock_types.h
new file mode 100644
index 00000000000..8141eb5ebf0
--- /dev/null
+++ b/include/asm-alpha/spinlock_types.h
@@ -0,0 +1,20 @@
+#ifndef _ALPHA_SPINLOCK_TYPES_H
+#define _ALPHA_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+typedef struct {
+	volatile unsigned int lock;
+} raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED	{ 0 }
+
+typedef struct {
+	volatile unsigned int lock;
+} raw_rwlock_t;
+
+#define __RAW_RW_LOCK_UNLOCKED		{ 0 }
+
+#endif
diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h
index 1f906d09b68..cb4906b4555 100644
--- a/include/asm-arm/spinlock.h
+++ b/include/asm-arm/spinlock.h
@@ -16,21 +16,14 @@
  * Unlocked value: 0
  * Locked value: 1
  */
-typedef struct {
-	volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
-	unsigned int break_lock;
-#endif
-} spinlock_t;
 
-#define SPIN_LOCK_UNLOCKED	(spinlock_t) { 0 }
+#define __raw_spin_is_locked(x)		((x)->lock != 0)
+#define __raw_spin_unlock_wait(lock) \
+	do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
 
-#define spin_lock_init(x)	do { *(x) = SPIN_LOCK_UNLOCKED; } while (0)
-#define spin_is_locked(x)	((x)->lock != 0)
-#define spin_unlock_wait(x)	do { barrier(); } while (spin_is_locked(x))
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
 
-static inline void _raw_spin_lock(spinlock_t *lock)
+static inline void __raw_spin_lock(raw_spinlock_t *lock)
 {
 	unsigned long tmp;
 
@@ -47,7 +40,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
 	smp_mb();
 }
 
-static inline int _raw_spin_trylock(spinlock_t *lock)
+static inline int __raw_spin_trylock(raw_spinlock_t *lock)
 {
 	unsigned long tmp;
 
@@ -67,7 +60,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock)
 	}
 }
 
-static inline void _raw_spin_unlock(spinlock_t *lock)
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
 {
 	smp_mb();
 
@@ -80,23 +73,14 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
 
 /*
  * RWLOCKS
- */
-typedef struct {
-	volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
-	unsigned int break_lock;
-#endif
-} rwlock_t;
-
-#define RW_LOCK_UNLOCKED	(rwlock_t) { 0 }
-#define rwlock_init(x)		do { *(x) = RW_LOCK_UNLOCKED; } while (0)
-#define rwlock_is_locked(x)	(*((volatile unsigned int *)(x)) != 0)
-
-/*
+ *
+ *
  * Write locks are easy - we just set bit 31.  When unlocking, we can
  * just write zero since the lock is exclusively held.
  */
-static inline void _raw_write_lock(rwlock_t *rw)
+#define rwlock_is_locked(x)	(*((volatile unsigned int *)(x)) != 0)
+
+static inline void __raw_write_lock(rwlock_t *rw)
 {
 	unsigned long tmp;
 
@@ -113,7 +97,7 @@ static inline void _raw_write_lock(rwlock_t *rw)
 	smp_mb();
 }
 
-static inline int _raw_write_trylock(rwlock_t *rw)
+static inline int __raw_write_trylock(rwlock_t *rw)
 {
 	unsigned long tmp;
 
@@ -133,7 +117,7 @@ static inline int _raw_write_trylock(rwlock_t *rw)
 	}
 }
 
-static inline void _raw_write_unlock(rwlock_t *rw)
+static inline void __raw_write_unlock(raw_rwlock_t *rw)
 {
 	smp_mb();
 
@@ -156,7 +140,7 @@ static inline void _raw_write_unlock(rwlock_t *rw)
  * currently active.  However, we know we won't have any write
  * locks.
  */
-static inline void _raw_read_lock(rwlock_t *rw)
+static inline void __raw_read_lock(raw_rwlock_t *rw)
 {
 	unsigned long tmp, tmp2;
 
@@ -173,7 +157,7 @@ static inline void _raw_read_lock(rwlock_t *rw)
 	smp_mb();
 }
 
-static inline void _raw_read_unlock(rwlock_t *rw)
+static inline void __raw_read_unlock(rwlock_t *rw)
 {
 	unsigned long tmp, tmp2;
 
@@ -190,6 +174,6 @@ static inline void _raw_read_unlock(rwlock_t *rw)
 	: "cc");
 }
 
-#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
+#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
 
 #endif /* __ASM_SPINLOCK_H */
diff --git a/include/asm-arm/spinlock_types.h b/include/asm-arm/spinlock_types.h
new file mode 100644
index 00000000000..43e83f6d2ee
--- /dev/null
+++ b/include/asm-arm/spinlock_types.h
@@ -0,0 +1,20 @@
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+typedef struct {
+	volatile unsigned int lock;
+} raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED	{ 0 }
+
+typedef struct {
+	volatile unsigned int lock;
+} raw_rwlock_t;
+
+#define __RAW_RW_LOCK_UNLOCKED		{ 0 }
+
+#endif
diff --git a/include/asm-i386/spinlock.h b/include/asm-i386/spinlock.h
index f9ff31f4003..23604350cdf 100644
--- a/include/asm-i386/spinlock.h
+++ b/include/asm-i386/spinlock.h
@@ -7,46 +7,21 @@
 #include <linux/config.h>
 #include <linux/compiler.h>
 
-asmlinkage int printk(const char * fmt, ...)
-	__attribute__ ((format (printf, 1, 2)));
-
 /*
  * Your basic SMP spinlocks, allowing only a single CPU anywhere
- */
-
-typedef struct {
-	volatile unsigned int slock;
-#ifdef CONFIG_DEBUG_SPINLOCK
-	unsigned magic;
-#endif
-#ifdef CONFIG_PREEMPT
-	unsigned int break_lock;
-#endif
-} spinlock_t;
-
-#define SPINLOCK_MAGIC	0xdead4ead
-
-#ifdef CONFIG_DEBUG_SPINLOCK
-#define SPINLOCK_MAGIC_INIT	, SPINLOCK_MAGIC
-#else
-#define SPINLOCK_MAGIC_INIT	/* */
-#endif
-
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 1 SPINLOCK_MAGIC_INIT }
-
-#define spin_lock_init(x)	do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
-
-/*
+ *
  * Simple spin lock operations.  There are two variants, one clears IRQ's
  * on the local processor, one does not.
  *
  * We make no fairness assumptions. They have a cost.
+ *
+ * (the type definitions are in asm/spinlock_types.h)
  */
 
-#define spin_is_locked(x)	(*(volatile signed char *)(&(x)->slock) <= 0)
-#define spin_unlock_wait(x)	do { barrier(); } while(spin_is_locked(x))
+#define __raw_spin_is_locked(x) \
+		(*(volatile signed char *)(&(x)->slock) <= 0)
 
-#define spin_lock_string \
+#define __raw_spin_lock_string \
 	"\n1:\t" \
 	"lock ; decb %0\n\t" \
 	"jns 3f\n" \
@@ -57,7 +32,7 @@ typedef struct {
 	"jmp 1b\n" \
 	"3:\n\t"
 
-#define spin_lock_string_flags \
+#define __raw_spin_lock_string_flags \
 	"\n1:\t" \
 	"lock ; decb %0\n\t" \
 	"jns 4f\n\t" \
@@ -73,86 +48,71 @@ typedef struct {
 	"jmp 1b\n" \
 	"4:\n\t"
 
+static inline void __raw_spin_lock(raw_spinlock_t *lock)
+{
+	__asm__ __volatile__(
+		__raw_spin_lock_string
+		:"=m" (lock->slock) : : "memory");
+}
+
+static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
+{
+	__asm__ __volatile__(
+		__raw_spin_lock_string_flags
+		:"=m" (lock->slock) : "r" (flags) : "memory");
+}
+
+static inline int __raw_spin_trylock(raw_spinlock_t *lock)
+{
+	char oldval;
+	__asm__ __volatile__(
+		"xchgb %b0,%1"
+		:"=q" (oldval), "=m" (lock->slock)
+		:"0" (0) : "memory");
+	return oldval > 0;
+}
+
 /*
- * This works. Despite all the confusion.
- * (except on PPro SMP or if we are using OOSTORE)
+ * __raw_spin_unlock based on writing $1 to the low byte.
+ * This method works. Despite all the confusion.
+ * (except on PPro SMP or if we are using OOSTORE, so we use xchgb there)
  * (PPro errata 66, 92)
  */
 
 #if !defined(CONFIG_X86_OOSTORE) && !defined(CONFIG_X86_PPRO_FENCE)
 
-#define spin_unlock_string \
+#define __raw_spin_unlock_string \
 	"movb $1,%0" \
 		:"=m" (lock->slock) : : "memory"
 
 
-static inline void _raw_spin_unlock(spinlock_t *lock)
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
 {
-#ifdef CONFIG_DEBUG_SPINLOCK
-	BUG_ON(lock->magic != SPINLOCK_MAGIC);
-	BUG_ON(!spin_is_locked(lock));
-#endif
 	__asm__ __volatile__(
-		spin_unlock_string
+		__raw_spin_unlock_string
 	);
 }
 
 #else
 
-#define spin_unlock_string \
+#define __raw_spin_unlock_string \
 	"xchgb %b0, %1" \
 		:"=q" (oldval), "=m" (lock->slock) \
 		:"0" (oldval) : "memory"
 
-static inline void _raw_spin_unlock(spinlock_t *lock)
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
 {
 	char oldval = 1;
-#ifdef CONFIG_DEBUG_SPINLOCK
-	BUG_ON(lock->magic != SPINLOCK_MAGIC);
-	BUG_ON(!spin_is_locked(lock));
-#endif
-	__asm__ __volatile__(
-		spin_unlock_string
-	);
-}
 
-#endif
-
-static inline int _raw_spin_trylock(spinlock_t *lock)
-{
-	char oldval;
 	__asm__ __volatile__(
-		"xchgb %b0,%1"
-		:"=q" (oldval), "=m" (lock->slock)
-		:"0" (0) : "memory");
-	return oldval > 0;
+		__raw_spin_unlock_string
+	);
 }
 
-static inline void _raw_spin_lock(spinlock_t *lock)
-{
-#ifdef CONFIG_DEBUG_SPINLOCK
-	if (unlikely(lock->magic != SPINLOCK_MAGIC)) {
-		printk("eip: %p\n", __builtin_return_address(0));
-		BUG();
-	}
 #endif
-	__asm__ __volatile__(
-		spin_lock_string
-		:"=m" (lock->slock) : : "memory");
-}
 
-static inline void _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
-{
-#ifdef CONFIG_DEBUG_SPINLOCK
-	if (unlikely(lock->magic != SPINLOCK_MAGIC)) {
-		printk("eip: %p\n", __builtin_return_address(0));
-		BUG();
-	}
-#endif
-	__asm__ __volatile__(
-		spin_lock_string_flags
-		:"=m" (lock->slock) : "r" (flags) : "memory");
-}
+#define __raw_spin_unlock_wait(lock) \
+	do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
 
 /*
  * Read-write spinlocks, allowing multiple readers
@@ -163,72 +123,41 @@ static inline void _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
  * can "mix" irq-safe locks - any writer needs to get a
  * irq-safe write-lock, but readers can get non-irqsafe
  * read-locks.
+ *
+ * On x86, we implement read-write locks as a 32-bit counter
+ * with the high bit (sign) being the "contended" bit.
+ *
+ * The inline assembly is non-obvious. Think about it.
+ *
+ * Changed to use the same technique as rw semaphores.  See
+ * semaphore.h for details.  -ben
+ *
+ * the helpers are in arch/i386/kernel/semaphore.c
  */
-typedef struct {
-	volatile unsigned int lock;
-#ifdef CONFIG_DEBUG_SPINLOCK
-	unsigned magic;
-#endif
-#ifdef CONFIG_PREEMPT
-	unsigned int break_lock;
-#endif
-} rwlock_t;
-
-#define RWLOCK_MAGIC	0xdeaf1eed
-
-#ifdef CONFIG_DEBUG_SPINLOCK
-#define RWLOCK_MAGIC_INIT	, RWLOCK_MAGIC
-#else
-#define RWLOCK_MAGIC_INIT	/* */
-#endif
-
-#define RW_LOCK_UNLOCKED (rwlock_t) { RW_LOCK_BIAS RWLOCK_MAGIC_INIT }
-
-#define rwlock_init(x)	do { *(x) = RW_LOCK_UNLOCKED; } while(0)
 
 /**
  * read_can_lock - would read_trylock() succeed?
  * @lock: the rwlock in question.
  */
-#define read_can_lock(x) ((int)(x)->lock > 0)
+#define __raw_read_can_lock(x)		((int)(x)->lock > 0)
 
 /**
  * write_can_lock - would write_trylock() succeed?
  * @lock: the rwlock in question.
  */
-#define write_can_lock(x) ((x)->lock == RW_LOCK_BIAS)
+#define __raw_write_can_lock(x)		((x)->lock == RW_LOCK_BIAS)
 
-/*
- * On x86, we implement read-write locks as a 32-bit counter
- * with the high bit (sign) being the "contended" bit.
- *
- * The inline assembly is non-obvious. Think about it.
- *
- * Changed to use the same technique as rw semaphores.  See
- * semaphore.h for details.  -ben
- */
-/* the spinlock helpers are in arch/i386/kernel/semaphore.c */
-
-static inline void _raw_read_lock(rwlock_t *rw)
+static inline void __raw_read_lock(raw_rwlock_t *rw)
 {
-#ifdef CONFIG_DEBUG_SPINLOCK
-	BUG_ON(rw->magic != RWLOCK_MAGIC);
-#endif
 	__build_read_lock(rw, "__read_lock_failed");
 }
 
-static inline void _raw_write_lock(rwlock_t *rw)
+static inline void __raw_write_lock(raw_rwlock_t *rw)
 {
-#ifdef CONFIG_DEBUG_SPINLOCK
-	BUG_ON(rw->magic != RWLOCK_MAGIC);
-#endif
 	__build_write_lock(rw, "__write_lock_failed");
 }
 
-#define _raw_read_unlock(rw)		asm volatile("lock ; incl %0" :"=m" ((rw)->lock) : : "memory")
-#define _raw_write_unlock(rw)	asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ",%0":"=m" ((rw)->lock) : : "memory")
-
-static inline int _raw_read_trylock(rwlock_t *lock)
+static inline int __raw_read_trylock(raw_rwlock_t *lock)
 {
 	atomic_t *count = (atomic_t *)lock;
 	atomic_dec(count);
@@ -238,7 +167,7 @@ static inline int _raw_read_trylock(rwlock_t *lock)
 	return 0;
 }
 
-static inline int _raw_write_trylock(rwlock_t *lock)
+static inline int __raw_write_trylock(raw_rwlock_t *lock)
 {
 	atomic_t *count = (atomic_t *)lock;
 	if (atomic_sub_and_test(RW_LOCK_BIAS, count))
@@ -247,4 +176,15 @@ static inline int _raw_write_trylock(rwlock_t *lock)
 	return 0;
 }
 
+static inline void __raw_read_unlock(raw_rwlock_t *rw)
+{
+	asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
+}
+
+static inline void __raw_write_unlock(raw_rwlock_t *rw)
+{
+	asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ", %0"
+				 : "=m" (rw->lock) : : "memory");
+}
+
 #endif /* __ASM_SPINLOCK_H */
diff --git a/include/asm-i386/spinlock_types.h b/include/asm-i386/spinlock_types.h
new file mode 100644
index 00000000000..59efe849f35
--- /dev/null
+++ b/include/asm-i386/spinlock_types.h
@@ -0,0 +1,20 @@
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+typedef struct {
+	volatile unsigned int slock;
+} raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED	{ 1 }
+
+typedef struct {
+	volatile unsigned int lock;
+} raw_rwlock_t;
+
+#define __RAW_RW_LOCK_UNLOCKED		{ RW_LOCK_BIAS }
+
+#endif
diff --git a/include/asm-ia64/spinlock.h b/include/asm-ia64/spinlock.h
index d2430aa0d49..5b78611411c 100644
--- a/include/asm-ia64/spinlock.h
+++ b/include/asm-ia64/spinlock.h
@@ -17,28 +17,20 @@
 #include <asm/intrinsics.h>
 #include <asm/system.h>
 
-typedef struct {
-	volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
-	unsigned int break_lock;
-#endif
-} spinlock_t;
-
-#define SPIN_LOCK_UNLOCKED			(spinlock_t) { 0 }
-#define spin_lock_init(x)			((x)->lock = 0)
+#define __raw_spin_lock_init(x)			((x)->lock = 0)
 
 #ifdef ASM_SUPPORTED
 /*
  * Try to get the lock.  If we fail to get the lock, make a non-standard call to
  * ia64_spinlock_contention().  We do not use a normal call because that would force all
- * callers of spin_lock() to be non-leaf routines.  Instead, ia64_spinlock_contention() is
- * carefully coded to touch only those registers that spin_lock() marks "clobbered".
+ * callers of __raw_spin_lock() to be non-leaf routines.  Instead, ia64_spinlock_contention() is
+ * carefully coded to touch only those registers that __raw_spin_lock() marks "clobbered".
  */
 
 #define IA64_SPINLOCK_CLOBBERS "ar.ccv", "ar.pfs", "p14", "p15", "r27", "r28", "r29", "r30", "b6", "memory"
 
 static inline void
-_raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
+__raw_spin_lock_flags (raw_spinlock_t *lock, unsigned long flags)
 {
 	register volatile unsigned int *ptr asm ("r31") = &lock->lock;
 
@@ -94,17 +86,17 @@ _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
 #endif
 }
 
-#define _raw_spin_lock(lock) _raw_spin_lock_flags(lock, 0)
+#define __raw_spin_lock(lock) __raw_spin_lock_flags(lock, 0)
 
 /* Unlock by doing an ordered store and releasing the cacheline with nta */
-static inline void _raw_spin_unlock(spinlock_t *x) {
+static inline void __raw_spin_unlock(raw_spinlock_t *x) {
 	barrier();
 	asm volatile ("st4.rel.nta [%0] = r0\n\t" :: "r"(x));
 }
 
 #else /* !ASM_SUPPORTED */
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
-# define _ra