diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2010-02-17 18:27:37 +0100 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2010-02-17 18:28:05 +0100 |
commit | b7e56edba4b02f2079042c326a8cd72a44635817 (patch) | |
tree | b5042002e9747cd8fb1278d61f86d8b92a74c018 /kernel/spinlock.c | |
parent | 13ca0fcaa33f6b1984c4111b6ec5df42689fea6f (diff) | |
parent | b0483e78e5c4c9871fc5541875b3bc006846d46b (diff) |
Merge branch 'linus' into x86/mm
x86/mm is on 32-rc4 and missing the spinlock namespace changes which
are needed for further commits into this topic.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/spinlock.c')
-rw-r--r-- | kernel/spinlock.c | 448 |
1 files changed, 223 insertions, 225 deletions
diff --git a/kernel/spinlock.c b/kernel/spinlock.c index 5ddab730cb2..be6517fb9c1 100644 --- a/kernel/spinlock.c +++ b/kernel/spinlock.c @@ -21,193 +21,72 @@ #include <linux/debug_locks.h> #include <linux/module.h> -#ifndef _spin_trylock -int __lockfunc _spin_trylock(spinlock_t *lock) -{ - return __spin_trylock(lock); -} -EXPORT_SYMBOL(_spin_trylock); -#endif - -#ifndef _read_trylock -int __lockfunc _read_trylock(rwlock_t *lock) -{ - return __read_trylock(lock); -} -EXPORT_SYMBOL(_read_trylock); -#endif - -#ifndef _write_trylock -int __lockfunc _write_trylock(rwlock_t *lock) -{ - return __write_trylock(lock); -} -EXPORT_SYMBOL(_write_trylock); -#endif - /* * 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) - -#ifndef _read_lock -void __lockfunc _read_lock(rwlock_t *lock) -{ - __read_lock(lock); -} -EXPORT_SYMBOL(_read_lock); -#endif - -#ifndef _spin_lock_irqsave -unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) -{ - return __spin_lock_irqsave(lock); -} -EXPORT_SYMBOL(_spin_lock_irqsave); -#endif - -#ifndef _spin_lock_irq -void __lockfunc _spin_lock_irq(spinlock_t *lock) -{ - __spin_lock_irq(lock); -} -EXPORT_SYMBOL(_spin_lock_irq); -#endif - -#ifndef _spin_lock_bh -void __lockfunc _spin_lock_bh(spinlock_t *lock) -{ - __spin_lock_bh(lock); -} -EXPORT_SYMBOL(_spin_lock_bh); -#endif - -#ifndef _read_lock_irqsave -unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock) -{ - return __read_lock_irqsave(lock); -} -EXPORT_SYMBOL(_read_lock_irqsave); -#endif - -#ifndef _read_lock_irq -void __lockfunc _read_lock_irq(rwlock_t *lock) -{ - __read_lock_irq(lock); -} -EXPORT_SYMBOL(_read_lock_irq); -#endif - -#ifndef _read_lock_bh -void __lockfunc _read_lock_bh(rwlock_t *lock) -{ - __read_lock_bh(lock); -} -EXPORT_SYMBOL(_read_lock_bh); -#endif - -#ifndef _write_lock_irqsave -unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock) -{ - return __write_lock_irqsave(lock); -} -EXPORT_SYMBOL(_write_lock_irqsave); -#endif - -#ifndef _write_lock_irq -void __lockfunc _write_lock_irq(rwlock_t *lock) -{ - __write_lock_irq(lock); -} -EXPORT_SYMBOL(_write_lock_irq); -#endif - -#ifndef _write_lock_bh -void __lockfunc _write_lock_bh(rwlock_t *lock) -{ - __write_lock_bh(lock); -} -EXPORT_SYMBOL(_write_lock_bh); -#endif - -#ifndef _spin_lock -void __lockfunc _spin_lock(spinlock_t *lock) -{ - __spin_lock(lock); -} -EXPORT_SYMBOL(_spin_lock); -#endif - -#ifndef _write_lock -void __lockfunc _write_lock(rwlock_t *lock) -{ - __write_lock(lock); -} -EXPORT_SYMBOL(_write_lock); -#endif - -#else /* CONFIG_PREEMPT: */ - /* + * 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) +/* + * 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. - * - * (We do this in a function because inlining it would be excessive.) */ - #define BUILD_LOCK_OPS(op, locktype) \ -void __lockfunc _##op##_lock(locktype##_t *lock) \ +void __lockfunc __raw_##op##_lock(locktype##_t *lock) \ { \ for (;;) { \ preempt_disable(); \ - if (likely(_raw_##op##_trylock(lock))) \ + if (likely(do_raw_##op##_trylock(lock))) \ break; \ preempt_enable(); \ \ if (!(lock)->break_lock) \ (lock)->break_lock = 1; \ - while (!op##_can_lock(lock) && (lock)->break_lock) \ - _raw_##op##_relax(&lock->raw_lock); \ + while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\ + arch_##op##_relax(&lock->raw_lock); \ } \ (lock)->break_lock = 0; \ } \ \ -EXPORT_SYMBOL(_##op##_lock); \ - \ -unsigned long __lockfunc _##op##_lock_irqsave(locktype##_t *lock) \ +unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock) \ { \ unsigned long flags; \ \ for (;;) { \ preempt_disable(); \ local_irq_save(flags); \ - if (likely(_raw_##op##_trylock(lock))) \ + if (likely(do_raw_##op##_trylock(lock))) \ break; \ local_irq_restore(flags); \ preempt_enable(); \ \ if (!(lock)->break_lock) \ (lock)->break_lock = 1; \ - while (!op##_can_lock(lock) && (lock)->break_lock) \ - _raw_##op##_relax(&lock->raw_lock); \ + while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\ + arch_##op##_relax(&lock->raw_lock); \ } \ (lock)->break_lock = 0; \ return flags; \ } \ \ -EXPORT_SYMBOL(_##op##_lock_irqsave); \ - \ -void __lockfunc _##op##_lock_irq(locktype##_t *lock) \ +void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock) \ { \ - _##op##_lock_irqsave(lock); \ + _raw_##op##_lock_irqsave(lock); \ } \ \ -EXPORT_SYMBOL(_##op##_lock_irq); \ - \ -void __lockfunc _##op##_lock_bh(locktype##_t *lock) \ +void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \ { \ unsigned long flags; \ \ @@ -216,164 +95,283 @@ void __lockfunc _##op##_lock_bh(locktype##_t *lock) \ /* irq-disabling. We use the generic preemption-aware */ \ /* function: */ \ /**/ \ - flags = _##op##_lock_irqsave(lock); \ + flags = _raw_##op##_lock_irqsave(lock); \ local_bh_disable(); \ local_irq_restore(flags); \ } \ - \ -EXPORT_SYMBOL(_##op##_lock_bh) /* * 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() + * __[spin|read|write]_lock() + * __[spin|read|write]_lock_irq() + * __[spin|read|write]_lock_irqsave() + * __[spin|read|write]_lock_bh() */ -BUILD_LOCK_OPS(spin, spinlock); +BUILD_LOCK_OPS(spin, raw_spinlock); BUILD_LOCK_OPS(read, rwlock); BUILD_LOCK_OPS(write, rwlock); -#endif /* CONFIG_PREEMPT */ +#endif -#ifdef CONFIG_DEBUG_LOCK_ALLOC +#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 -void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass) +#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH +int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock) { - preempt_disable(); - spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_); - LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); + return __raw_spin_trylock_bh(lock); } -EXPORT_SYMBOL(_spin_lock_nested); +EXPORT_SYMBOL(_raw_spin_trylock_bh); +#endif -unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass) +#ifndef CONFIG_INLINE_SPIN_LOCK +void __lockfunc _raw_spin_lock(raw_spinlock_t *lock) { - unsigned long flags; + __raw_spin_lock(lock); +} +EXPORT_SYMBOL(_raw_spin_lock); +#endif - local_irq_save(flags); - preempt_disable(); - spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_); - LOCK_CONTENDED_FLAGS(lock, _raw_spin_trylock, _raw_spin_lock, - _raw_spin_lock_flags, &flags); - return flags; +#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(_spin_lock_irqsave_nested); +EXPORT_SYMBOL(_raw_spin_lock_irqsave); +#endif -void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, - struct lockdep_map *nest_lock) +#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ +void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock) { - preempt_disable(); - spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_); - LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); + __raw_spin_lock_irq(lock); } -EXPORT_SYMBOL(_spin_lock_nest_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 -#ifndef _spin_unlock -void __lockfunc _spin_unlock(spinlock_t *lock) +#ifndef CONFIG_INLINE_SPIN_UNLOCK +void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock) { - __spin_unlock(lock); + __raw_spin_unlock(lock); } -EXPORT_SYMBOL(_spin_unlock); +EXPORT_SYMBOL(_raw_spin_unlock); #endif -#ifndef _write_unlock -void __lockfunc _write_unlock(rwlock_t *lock) +#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE +void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags) { - __write_unlock(lock); + __raw_spin_unlock_irqrestore(lock, flags); } -EXPORT_SYMBOL(_write_unlock); +EXPORT_SYMBOL(_raw_spin_unlock_irqrestore); #endif -#ifndef _read_unlock -void __lockfunc _read_unlock(rwlock_t *lock) +#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ +void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock) { - __read_unlock(lock); + __raw_spin_unlock_irq(lock); } -EXPORT_SYMBOL(_read_unlock); +EXPORT_SYMBOL(_raw_spin_unlock_irq); #endif -#ifndef _spin_unlock_irqrestore -void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) +#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH +void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) { - __spin_unlock_irqrestore(lock, flags); + __raw_spin_unlock_bh(lock); } -EXPORT_SYMBOL(_spin_unlock_irqrestore); +EXPORT_SYMBOL(_raw_spin_unlock_bh); #endif -#ifndef _spin_unlock_irq -void __lockfunc _spin_unlock_irq(spinlock_t *lock) +#ifndef CONFIG_INLINE_READ_TRYLOCK +int __lockfunc _raw_read_trylock(rwlock_t *lock) { - __spin_unlock_irq(lock); + return __raw_read_trylock(lock); } -EXPORT_SYMBOL(_spin_unlock_irq); +EXPORT_SYMBOL(_raw_read_trylock); #endif -#ifndef _spin_unlock_bh -void __lockfunc _spin_unlock_bh(spinlock_t *lock) +#ifndef CONFIG_INLINE_READ_LOCK +void __lockfunc _raw_read_lock(rwlock_t *lock) { - __spin_unlock_bh(lock); + __raw_read_lock(lock); } -EXPORT_SYMBOL(_spin_unlock_bh); +EXPORT_SYMBOL(_raw_read_lock); #endif -#ifndef _read_unlock_irqrestore -void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) +#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE +unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock) { - __read_unlock_irqrestore(lock, flags); + return __raw_read_lock_irqsave(lock); } -EXPORT_SYMBOL(_read_unlock_irqrestore); +EXPORT_SYMBOL(_raw_read_lock_irqsave); #endif -#ifndef _read_unlock_irq -void __lockfunc _read_unlock_irq(rwlock_t *lock) +#ifndef CONFIG_INLINE_READ_LOCK_IRQ +void __lockfunc _raw_read_lock_irq(rwlock_t *lock) { - __read_unlock_irq(lock); + __raw_read_lock_irq(lock); } -EXPORT_SYMBOL(_read_unlock_irq); +EXPORT_SYMBOL(_raw_read_lock_irq); #endif -#ifndef _read_unlock_bh -void __lockfunc _read_unlock_bh(rwlock_t *lock) +#ifndef CONFIG_INLINE_READ_LOCK_BH +void __lockfunc _raw_read_lock_bh(rwlock_t *lock) { - __read_unlock_bh(lock); + __raw_read_lock_bh(lock); } -EXPORT_SYMBOL(_read_unlock_bh); +EXPORT_SYMBOL(_raw_read_lock_bh); #endif -#ifndef _write_unlock_irqrestore -void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) +#ifndef CONFIG_INLINE_READ_UNLOCK +void __lockfunc _raw_read_unlock(rwlock_t *lock) { - __write_unlock_irqrestore(lock, flags); + __raw_read_unlock(lock); } -EXPORT_SYMBOL(_write_unlock_irqrestore); +EXPORT_SYMBOL(_raw_read_unlock); #endif -#ifndef _write_unlock_irq -void __lockfunc _write_unlock_irq(rwlock_t *lock) +#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE +void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) { - __write_unlock_irq(lock); + __raw_read_unlock_irqrestore(lock, flags); } -EXPORT_SYMBOL(_write_unlock_irq); +EXPORT_SYMBOL(_raw_read_unlock_irqrestore); #endif -#ifndef _write_unlock_bh -void __lockfunc _write_unlock_bh(rwlock_t *lock) +#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ +void __lockfunc _raw_read_unlock_irq(rwlock_t *lock) { - __write_unlock_bh(lock); + __raw_read_unlock_irq(lock); } -EXPORT_SYMBOL(_write_unlock_bh); +EXPORT_SYMBOL(_raw_read_unlock_irq); #endif -#ifndef _spin_trylock_bh -int __lockfunc _spin_trylock_bh(spinlock_t *lock) +#ifndef CONFIG_INLINE_READ_UNLOCK_BH +void __lockfunc _raw_read_unlock_bh(rwlock_t *lock) { - return __spin_trylock_bh(lock); + __raw_read_unlock_bh(lock); } -EXPORT_SYMBOL(_spin_trylock_bh); +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) |