diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Makefile | 1 | ||||
| -rw-r--r-- | kernel/sched.c | 4 | ||||
| -rw-r--r-- | kernel/spinlock.c | 15 |
3 files changed, 14 insertions, 6 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 8d57a2f1226ba..ff4dc02ce1702 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -12,6 +12,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \ obj-$(CONFIG_FUTEX) += futex.o obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_SMP) += cpu.o spinlock.o +obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o obj-$(CONFIG_UID16) += uid16.o obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_KALLSYMS) += kallsyms.o diff --git a/kernel/sched.c b/kernel/sched.c index 2632b812cf24a..15db82116e194 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1511,6 +1511,10 @@ static inline void finish_task_switch(runqueue_t *rq, task_t *prev) * Manfred Spraul <manfred@colorfullife.com> */ prev_task_flags = prev->flags; +#ifdef CONFIG_DEBUG_SPINLOCK + /* this is a valid case when another task releases the spinlock */ + rq->lock.owner = current; +#endif finish_arch_switch(prev); finish_lock_switch(rq, prev); if (mm) diff --git a/kernel/spinlock.c b/kernel/spinlock.c index 0c3f9d8bbe17b..0375fcd5921df 100644 --- a/kernel/spinlock.c +++ b/kernel/spinlock.c @@ -3,7 +3,10 @@ * * Author: Zwane Mwaikambo <zwane@fsmlabs.com> * - * Copyright (2004) Ingo Molnar + * Copyright (2004, 2005) Ingo Molnar + * + * This file contains the spinlock/rwlock implementations for the + * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them) */ #include <linux/config.h> @@ -17,12 +20,12 @@ * Generic declaration of the raw read_trylock() function, * architectures are supposed to optimize this: */ -int __lockfunc generic_raw_read_trylock(rwlock_t *lock) +int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock) { - _raw_read_lock(lock); + __raw_read_lock(lock); return 1; } -EXPORT_SYMBOL(generic_raw_read_trylock); +EXPORT_SYMBOL(generic__raw_read_trylock); int __lockfunc _spin_trylock(spinlock_t *lock) { @@ -57,7 +60,7 @@ int __lockfunc _write_trylock(rwlock_t *lock) } EXPORT_SYMBOL(_write_trylock); -#ifndef CONFIG_PREEMPT +#if !defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP) void __lockfunc _read_lock(rwlock_t *lock) { @@ -72,7 +75,7 @@ unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) local_irq_save(flags); preempt_disable(); - _raw_spin_lock_flags(lock, flags); + _raw_spin_lock_flags(lock, &flags); return flags; } EXPORT_SYMBOL(_spin_lock_irqsave); |