locking: Move the spinlock code to kernel/locking/

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-b81ol0z3mon45m51o131yc9j@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 0 insertions, 399 deletions

diff --git a/kernel/spinlock.c b/kernel/spinlock.c
deleted file mode 100644
index 4b082b5cac9e..000000000000
--- a/kernel/spinlock.c
+++ /dev/null
@@ -1,399 +0,0 @@
-/*
- * Copyright (2004) Linus Torvalds
- *
- * Author: Zwane Mwaikambo <zwane@fsmlabs.com>
- *
- * Copyright (2004, 2005) Ingo Molnar
- *
- * This file contains the spinlock/rwlock implementations for the
- * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
- *
- * Note that some architectures have special knowledge about the
- * stack frames of these functions in their profile_pc. If you
- * change anything significant here that could change the stack
- * frame contact the architecture maintainers.
- */
-
-#include <linux/linkage.h>
-#include <linux/preempt.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/debug_locks.h>
-#include <linux/export.h>
-
-/*
- * If lockdep is enabled then we use the non-preemption spin-ops
- * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
- * not re-enabled during lock-acquire (which the preempt-spin-ops do):
- */
-#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
-/*
- * The __lock_function inlines are taken from
- * include/linux/spinlock_api_smp.h
- */
-#else
-#define raw_read_can_lock(l)	read_can_lock(l)
-#define raw_write_can_lock(l)	write_can_lock(l)
-
-/*
- * Some architectures can relax in favour of the CPU owning the lock.
- */
-#ifndef arch_read_relax
-# define arch_read_relax(l)	cpu_relax()
-#endif
-#ifndef arch_write_relax
-# define arch_write_relax(l)	cpu_relax()
-#endif
-#ifndef arch_spin_relax
-# define arch_spin_relax(l)	cpu_relax()
-#endif
-
-/*
- * We build the __lock_function inlines here. They are too large for
- * inlining all over the place, but here is only one user per function
- * which embedds them into the calling _lock_function below.
- *
- * This could be a long-held lock. We both prepare to spin for a long
- * time (making _this_ CPU preemptable if possible), and we also signal
- * towards that other CPU that it should break the lock ASAP.
- */
-#define BUILD_LOCK_OPS(op, locktype)					\
-void __lockfunc __raw_##op##_lock(locktype##_t *lock)			\
-{									\
-	for (;;) {							\
-		preempt_disable();					\
-		if (likely(do_raw_##op##_trylock(lock)))		\
-			break;						\
-		preempt_enable();					\
-									\
-		if (!(lock)->break_lock)				\
-			(lock)->break_lock = 1;				\
-		while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
-			arch_##op##_relax(&lock->raw_lock);		\
-	}								\
-	(lock)->break_lock = 0;						\
-}									\
-									\
-unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)	\
-{									\
-	unsigned long flags;						\
-									\
-	for (;;) {							\
-		preempt_disable();					\
-		local_irq_save(flags);					\
-		if (likely(do_raw_##op##_trylock(lock)))		\
-			break;						\
-		local_irq_restore(flags);				\
-		preempt_enable();					\
-									\
-		if (!(lock)->break_lock)				\
-			(lock)->break_lock = 1;				\
-		while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
-			arch_##op##_relax(&lock->raw_lock);		\
-	}								\
-	(lock)->break_lock = 0;						\
-	return flags;							\
-}									\
-									\
-void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)		\
-{									\
-	_raw_##op##_lock_irqsave(lock);					\
-}									\
-									\
-void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)		\
-{									\
-	unsigned long flags;						\
-									\
-	/*							*/	\
-	/* Careful: we must exclude softirqs too, hence the	*/	\
-	/* irq-disabling. We use the generic preemption-aware	*/	\
-	/* function:						*/	\
-	/**/								\
-	flags = _raw_##op##_lock_irqsave(lock);				\
-	local_bh_disable();						\
-	local_irq_restore(flags);					\
-}									\
-
-/*
- * Build preemption-friendly versions of the following
- * lock-spinning functions:
- *
- *         __[spin|read|write]_lock()
- *         __[spin|read|write]_lock_irq()
- *         __[spin|read|write]_lock_irqsave()
- *         __[spin|read|write]_lock_bh()
- */
-BUILD_LOCK_OPS(spin, raw_spinlock);
-BUILD_LOCK_OPS(read, rwlock);
-BUILD_LOCK_OPS(write, rwlock);
-
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_TRYLOCK
-int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
-{
-	return __raw_spin_trylock(lock);
-}
-EXPORT_SYMBOL(_raw_spin_trylock);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH
-int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
-{
-	return __raw_spin_trylock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_spin_trylock_bh);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_LOCK
-void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
-{
-	__raw_spin_lock(lock);
-}
-EXPORT_SYMBOL(_raw_spin_lock);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
-unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
-{
-	return __raw_spin_lock_irqsave(lock);
-}
-EXPORT_SYMBOL(_raw_spin_lock_irqsave);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ
-void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
-{
-	__raw_spin_lock_irq(lock);
-}
-EXPORT_SYMBOL(_raw_spin_lock_irq);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_LOCK_BH
-void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
-{
-	__raw_spin_lock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_spin_lock_bh);
-#endif
-
-#ifdef CONFIG_UNINLINE_SPIN_UNLOCK
-void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
-{
-	__raw_spin_unlock(lock);
-}
-EXPORT_SYMBOL(_raw_spin_unlock);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
-void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
-{
-	__raw_spin_unlock_irqrestore(lock, flags);
-}
-EXPORT_SYMBOL(_raw_spin_unlock_irqrestore);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ
-void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
-{
-	__raw_spin_unlock_irq(lock);
-}
-EXPORT_SYMBOL(_raw_spin_unlock_irq);
-#endif
-
-#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH
-void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
-{
-	__raw_spin_unlock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_spin_unlock_bh);
-#endif
-
-#ifndef CONFIG_INLINE_READ_TRYLOCK
-int __lockfunc _raw_read_trylock(rwlock_t *lock)
-{
-	return __raw_read_trylock(lock);
-}
-EXPORT_SYMBOL(_raw_read_trylock);
-#endif
-
-#ifndef CONFIG_INLINE_READ_LOCK
-void __lockfunc _raw_read_lock(rwlock_t *lock)
-{
-	__raw_read_lock(lock);
-}
-EXPORT_SYMBOL(_raw_read_lock);
-#endif
-
-#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE
-unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
-{
-	return __raw_read_lock_irqsave(lock);
-}
-EXPORT_SYMBOL(_raw_read_lock_irqsave);
-#endif
-
-#ifndef CONFIG_INLINE_READ_LOCK_IRQ
-void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
-{
-	__raw_read_lock_irq(lock);
-}
-EXPORT_SYMBOL(_raw_read_lock_irq);
-#endif
-
-#ifndef CONFIG_INLINE_READ_LOCK_BH
-void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
-{
-	__raw_read_lock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_read_lock_bh);
-#endif
-
-#ifndef CONFIG_INLINE_READ_UNLOCK
-void __lockfunc _raw_read_unlock(rwlock_t *lock)
-{
-	__raw_read_unlock(lock);
-}
-EXPORT_SYMBOL(_raw_read_unlock);
-#endif
-
-#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
-void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
-{
-	__raw_read_unlock_irqrestore(lock, flags);
-}
-EXPORT_SYMBOL(_raw_read_unlock_irqrestore);
-#endif
-
-#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ
-void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
-{
-	__raw_read_unlock_irq(lock);
-}
-EXPORT_SYMBOL(_raw_read_unlock_irq);
-#endif
-
-#ifndef CONFIG_INLINE_READ_UNLOCK_BH
-void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
-{
-	__raw_read_unlock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_read_unlock_bh);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_TRYLOCK
-int __lockfunc _raw_write_trylock(rwlock_t *lock)
-{
-	return __raw_write_trylock(lock);
-}
-EXPORT_SYMBOL(_raw_write_trylock);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_LOCK
-void __lockfunc _raw_write_lock(rwlock_t *lock)
-{
-	__raw_write_lock(lock);
-}
-EXPORT_SYMBOL(_raw_write_lock);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
-unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
-{
-	return __raw_write_lock_irqsave(lock);
-}
-EXPORT_SYMBOL(_raw_write_lock_irqsave);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_LOCK_IRQ
-void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
-{
-	__raw_write_lock_irq(lock);
-}
-EXPORT_SYMBOL(_raw_write_lock_irq);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_LOCK_BH
-void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
-{
-	__raw_write_lock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_write_lock_bh);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_UNLOCK
-void __lockfunc _raw_write_unlock(rwlock_t *lock)
-{
-	__raw_write_unlock(lock);
-}
-EXPORT_SYMBOL(_raw_write_unlock);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
-void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
-{
-	__raw_write_unlock_irqrestore(lock, flags);
-}
-EXPORT_SYMBOL(_raw_write_unlock_irqrestore);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQ
-void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
-{
-	__raw_write_unlock_irq(lock);
-}
-EXPORT_SYMBOL(_raw_write_unlock_irq);
-#endif
-
-#ifndef CONFIG_INLINE_WRITE_UNLOCK_BH
-void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
-{
-	__raw_write_unlock_bh(lock);
-}
-EXPORT_SYMBOL(_raw_write_unlock_bh);
-#endif
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-
-void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
-{
-	preempt_disable();
-	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
-	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
-}
-EXPORT_SYMBOL(_raw_spin_lock_nested);
-
-unsigned long __lockfunc _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock,
-						   int subclass)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	preempt_disable();
-	spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
-	LOCK_CONTENDED_FLAGS(lock, do_raw_spin_trylock, do_raw_spin_lock,
-				do_raw_spin_lock_flags, &flags);
-	return flags;
-}
-EXPORT_SYMBOL(_raw_spin_lock_irqsave_nested);
-
-void __lockfunc _raw_spin_lock_nest_lock(raw_spinlock_t *lock,
-				     struct lockdep_map *nest_lock)
-{
-	preempt_disable();
-	spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
-	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
-}
-EXPORT_SYMBOL(_raw_spin_lock_nest_lock);
-
-#endif
-
-notrace int in_lock_functions(unsigned long addr)
-{
-	/* Linker adds these: start and end of __lockfunc functions */
-	extern char __lock_text_start[], __lock_text_end[];
-
-	return addr >= (unsigned long)__lock_text_start
-	&& addr < (unsigned long)__lock_text_end;
-}
-EXPORT_SYMBOL(in_lock_functions);