Reaplace old PICK_OP style macros with the new PICK_FUNCTION macro. Signed-off-by: Daniel Walker --- include/linux/sched.h | 13 - include/linux/spinlock.h | 345 ++++++++++++++--------------------------------- kernel/rtmutex.c | 2 lib/dec_and_lock.c | 2 4 files changed, 111 insertions(+), 251 deletions(-) Index: linux-2.6.22/include/linux/sched.h =================================================================== --- linux-2.6.22.orig/include/linux/sched.h +++ linux-2.6.22/include/linux/sched.h @@ -1997,17 +1997,8 @@ extern int __cond_resched_raw_spinlock(r extern int __cond_resched_spinlock(spinlock_t *spinlock); #define cond_resched_lock(lock) \ -({ \ - int __ret; \ - \ - if (TYPE_EQUAL((lock), raw_spinlock_t)) \ - __ret = __cond_resched_raw_spinlock((raw_spinlock_t *)lock);\ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - __ret = __cond_resched_spinlock((spinlock_t *)lock); \ - else __ret = __bad_spinlock_type(); \ - \ - __ret; \ -}) + PICK_SPIN_OP_RET(__cond_resched_raw_spinlock, __cond_resched_spinlock,\ + lock) extern int cond_resched_softirq(void); extern int cond_resched_softirq_context(void); Index: linux-2.6.22/include/linux/spinlock.h =================================================================== --- linux-2.6.22.orig/include/linux/spinlock.h +++ linux-2.6.22/include/linux/spinlock.h @@ -91,6 +91,7 @@ #include #include #include +#include #include @@ -162,7 +163,7 @@ extern void __lockfunc rt_spin_unlock_wa extern int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags); extern int __lockfunc rt_spin_trylock(spinlock_t *lock); -extern int _atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock); +extern int _atomic_dec_and_spin_lock(spinlock_t *lock, atomic_t *atomic); /* * lockdep-less calls, for derived types like rwlock: @@ -243,54 +244,6 @@ do { \ # define _spin_trylock_irqsave(l,f) TSNBCONRT(l) #endif -#undef TYPE_EQUAL -#define TYPE_EQUAL(lock, type) \ - __builtin_types_compatible_p(typeof(lock), type *) - -#define PICK_OP(op, lock) \ -do { \ - if (TYPE_EQUAL((lock), raw_spinlock_t)) \ - __spin##op((raw_spinlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - _spin##op((spinlock_t *)(lock)); \ - else __bad_spinlock_type(); \ -} while (0) - -#define PICK_OP_RET(op, lock...) \ -({ \ - unsigned long __ret; \ - \ - if (TYPE_EQUAL((lock), raw_spinlock_t)) \ - __ret = __spin##op((raw_spinlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - __ret = _spin##op((spinlock_t *)(lock)); \ - else __ret = __bad_spinlock_type(); \ - \ - __ret; \ -}) - -#define PICK_OP2(op, lock, flags) \ -do { \ - if (TYPE_EQUAL((lock), raw_spinlock_t)) \ - __spin##op((raw_spinlock_t *)(lock), flags); \ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - _spin##op((spinlock_t *)(lock), flags); \ - else __bad_spinlock_type(); \ -} while (0) - -#define PICK_OP2_RET(op, lock, flags) \ -({ \ - unsigned long __ret; \ - \ - if (TYPE_EQUAL((lock), raw_spinlock_t)) \ - __ret = __spin##op((raw_spinlock_t *)(lock), flags); \ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - __ret = _spin##op((spinlock_t *)(lock), flags); \ - else __bad_spinlock_type(); \ - \ - __ret; \ -}) - extern void __lockfunc rt_write_lock(rwlock_t *rwlock); extern void __lockfunc rt_read_lock(rwlock_t *rwlock); extern int __lockfunc rt_write_trylock(rwlock_t *rwlock); @@ -349,76 +302,10 @@ do { \ # define _read_unlock_irqrestore(rwl, f) rt_read_unlock(rwl) # define _write_unlock_irqrestore(rwl, f) rt_write_unlock(rwl) -#define __PICK_RW_OP(optype, op, lock) \ -do { \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - __##optype##op((raw_rwlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - ##op((rwlock_t *)(lock)); \ - else __bad_rwlock_type(); \ -} while (0) - -#define PICK_RW_OP(optype, op, lock) \ -do { \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - __##optype##op((raw_rwlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - _##optype##op((rwlock_t *)(lock)); \ - else __bad_rwlock_type(); \ -} while (0) - -#define __PICK_RW_OP_RET(optype, op, lock...) \ -({ \ - unsigned long __ret; \ - \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - __ret = __##optype##op((raw_rwlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - __ret = _##optype##op((rwlock_t *)(lock)); \ - else __ret = __bad_rwlock_type(); \ - \ - __ret; \ -}) - -#define PICK_RW_OP_RET(optype, op, lock...) \ -({ \ - unsigned long __ret; \ - \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - __ret = __##optype##op((raw_rwlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - __ret = _##optype##op((rwlock_t *)(lock)); \ - else __ret = __bad_rwlock_type(); \ - \ - __ret; \ -}) - -#define PICK_RW_OP2(optype, op, lock, flags) \ -do { \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - __##optype##op((raw_rwlock_t *)(lock), flags); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - _##optype##op((rwlock_t *)(lock), flags); \ - else __bad_rwlock_type(); \ -} while (0) - -#define PICK_RW_OP2_RET(optype, op, lock, flags) \ -({ \ - unsigned long __ret; \ - \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - __ret = __##optype##op((raw_rwlock_t *)(lock), flags); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - __ret = _##optype##op((rwlock_t *)(lock), flags); \ - else __bad_rwlock_type(); \ - \ - __ret; \ -}) - #ifdef CONFIG_DEBUG_SPINLOCK extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, struct lock_class_key *key); -# define _raw_spin_lock_init(lock) \ +# define _raw_spin_lock_init(lock, name, file, line) \ do { \ static struct lock_class_key __key; \ \ @@ -428,25 +315,28 @@ do { \ #else #define __raw_spin_lock_init(lock) \ do { *(lock) = RAW_SPIN_LOCK_UNLOCKED(lock); } while (0) -# define _raw_spin_lock_init(lock) __raw_spin_lock_init(lock) +# define _raw_spin_lock_init(lock, name, file, line) __raw_spin_lock_init(lock) #endif -#define PICK_OP_INIT(op, lock) \ -do { \ - if (TYPE_EQUAL((lock), raw_spinlock_t)) \ - _raw_spin##op((raw_spinlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - _spin##op((spinlock_t *)(lock), #lock, __FILE__, __LINE__); \ - else __bad_spinlock_type(); \ -} while (0) - +/* + * PICK_SPIN_OP()/PICK_RW_OP() are simple redirectors for PICK_FUNCTION + */ +#define PICK_SPIN_OP(...) \ + PICK_FUNCTION(raw_spinlock_t, spinlock_t, ##__VA_ARGS__) +#define PICK_SPIN_OP_RET(...) \ + PICK_FUNCTION_RET(raw_spinlock_t, spinlock_t, ##__VA_ARGS__) +#define PICK_RW_OP(...) PICK_FUNCTION(raw_rwlock_t, rwlock_t, ##__VA_ARGS__) +#define PICK_RW_OP_RET(...) \ + PICK_FUNCTION_RET(raw_rwlock_t, rwlock_t, ##__VA_ARGS__) -#define spin_lock_init(lock) PICK_OP_INIT(_lock_init, lock) +#define spin_lock_init(lock) \ + PICK_SPIN_OP(_raw_spin_lock_init, _spin_lock_init, lock, #lock, \ + __FILE__, __LINE__) #ifdef CONFIG_DEBUG_SPINLOCK extern void __raw_rwlock_init(raw_rwlock_t *lock, const char *name, struct lock_class_key *key); -# define _raw_rwlock_init(lock) \ +# define _raw_rwlock_init(lock, name, file, line) \ do { \ static struct lock_class_key __key; \ \ @@ -455,83 +345,82 @@ do { \ #else #define __raw_rwlock_init(lock) \ do { *(lock) = RAW_RW_LOCK_UNLOCKED(lock); } while (0) -# define _raw_rwlock_init(lock) __raw_rwlock_init(lock) +# define _raw_rwlock_init(lock, name, file, line) __raw_rwlock_init(lock) #endif -#define __PICK_RW_OP_INIT(optype, op, lock) \ -do { \ - if (TYPE_EQUAL((lock), raw_rwlock_t)) \ - _raw_##optype##op((raw_rwlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, rwlock_t)) \ - _##optype##op((rwlock_t *)(lock), #lock, __FILE__, __LINE__);\ - else __bad_spinlock_type(); \ -} while (0) - -#define rwlock_init(lock) __PICK_RW_OP_INIT(rwlock, _init, lock) +#define rwlock_init(lock) \ + PICK_RW_OP(_raw_rwlock_init, _rwlock_init, lock, #lock, \ + __FILE__, __LINE__) #define __spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock) -#define spin_is_locked(lock) PICK_OP_RET(_is_locked, lock) +#define spin_is_locked(lock) \ + PICK_SPIN_OP_RET(__spin_is_locked, _spin_is_locked, lock) #define __spin_unlock_wait(lock) __raw_spin_unlock_wait(&(lock)->raw_lock) -#define spin_unlock_wait(lock) PICK_OP(_unlock_wait, lock) +#define spin_unlock_wait(lock) \ + PICK_SPIN_OP(__spin_unlock_wait, _spin_unlock_wait, lock) + /* * Define the various spin_lock and rw_lock methods. Note we define these * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various * methods are defined as nops in the case they are not required. */ -// #define spin_trylock(lock) _spin_trylock(lock) -#define spin_trylock(lock) __cond_lock(lock, PICK_OP_RET(_trylock, lock)) +#define spin_trylock(lock) \ + __cond_lock(lock, PICK_SPIN_OP_RET(__spin_trylock, _spin_trylock, lock)) -//#define read_trylock(lock) _read_trylock(lock) -#define read_trylock(lock) __cond_lock(lock, PICK_RW_OP_RET(read, _trylock, lock)) +#define read_trylock(lock) \ + __cond_lock(lock, PICK_RW_OP_RET(__read_trylock, _read_trylock, lock)) -//#define write_trylock(lock) _write_trylock(lock) -#define write_trylock(lock) __cond_lock(lock, PICK_RW_OP_RET(write, _trylock, lock)) +#define write_trylock(lock) \ + __cond_lock(lock, PICK_RW_OP_RET(__write_trylock, _write_trylock, lock)) #define write_trylock_irqsave(lock, flags) \ - __cond_lock(lock, PICK_RW_OP2_RET(write, _trylock_irqsave, lock, &flags)) + __cond_lock(lock, PICK_RW_OP_RET(__write_trylock_irqsave, \ + _write_trylock_irqsave, lock, &flags)) #define __spin_can_lock(lock) __raw_spin_can_lock(&(lock)->raw_lock) #define __read_can_lock(lock) __raw_read_can_lock(&(lock)->raw_lock) #define __write_can_lock(lock) __raw_write_can_lock(&(lock)->raw_lock) #define spin_can_lock(lock) \ - __cond_lock(lock, PICK_OP_RET(_can_lock, lock)) + __cond_lock(lock, PICK_SPIN_OP_RET(__spin_can_lock, _spin_can_lock,\ + lock)) #define read_can_lock(lock) \ - __cond_lock(lock, PICK_RW_OP_RET(read, _can_lock, lock)) + __cond_lock(lock, PICK_RW_OP_RET(__read_can_lock, _read_can_lock, lock)) #define write_can_lock(lock) \ - __cond_lock(lock, PICK_RW_OP_RET(write, _can_lock, lock)) + __cond_lock(lock, PICK_RW_OP_RET(__write_can_lock, _write_can_lock,\ + lock)) -// #define spin_lock(lock) _spin_lock(lock) -#define spin_lock(lock) PICK_OP(_lock, lock) +#define spin_lock(lock) PICK_SPIN_OP(__spin_lock, _spin_lock, lock) #ifdef CONFIG_DEBUG_LOCK_ALLOC -# define spin_lock_nested(lock, subclass) PICK_OP2(_lock_nested, lock, subclass) +# define spin_lock_nested(lock, subclass) \ + PICK_SPIN_OP(__spin_lock_nested, _spin_lock_nested, lock, subclass) #else # define spin_lock_nested(lock, subclass) spin_lock(lock) #endif -//#define write_lock(lock) _write_lock(lock) -#define write_lock(lock) PICK_RW_OP(write, _lock, lock) +#define write_lock(lock) PICK_RW_OP(__write_lock, _write_lock, lock) -// #define read_lock(lock) _read_lock(lock) -#define read_lock(lock) PICK_RW_OP(read, _lock, lock) +#define read_lock(lock) PICK_RW_OP(__read_lock, _read_lock, lock) # define spin_lock_irqsave(lock, flags) \ do { \ BUILD_CHECK_IRQ_FLAGS(flags); \ - flags = PICK_OP_RET(_lock_irqsave, lock); \ + flags = PICK_SPIN_OP_RET(__spin_lock_irqsave, _spin_lock_irqsave, \ + lock); \ } while (0) #ifdef CONFIG_DEBUG_LOCK_ALLOC # define spin_lock_irqsave_nested(lock, flags, subclass) \ do { \ BUILD_CHECK_IRQ_FLAGS(flags); \ - flags = PICK_OP2_RET(_lock_irqsave_nested, lock, subclass); \ + flags = PICK_SPIN_OP_RET(__spin_lock_irqsave_nested, \ + _spin_lock_irqsave_nested, lock, subclass); \ } while (0) #else # define spin_lock_irqsave_nested(lock, flags, subclass) \ @@ -541,112 +430,92 @@ do { \ # define read_lock_irqsave(lock, flags) \ do { \ BUILD_CHECK_IRQ_FLAGS(flags); \ - flags = PICK_RW_OP_RET(read, _lock_irqsave, lock); \ + flags = PICK_RW_OP_RET(__read_lock_irqsave, _read_lock_irqsave, lock);\ } while (0) # define write_lock_irqsave(lock, flags) \ do { \ BUILD_CHECK_IRQ_FLAGS(flags); \ - flags = PICK_RW_OP_RET(write, _lock_irqsave, lock); \ + flags = PICK_RW_OP_RET(__write_lock_irqsave, _write_lock_irqsave,lock);\ } while (0) -// #define spin_lock_irq(lock) _spin_lock_irq(lock) -// #define spin_lock_bh(lock) _spin_lock_bh(lock) -#define spin_lock_irq(lock) PICK_OP(_lock_irq, lock) -#define spin_lock_bh(lock) PICK_OP(_lock_bh, lock) - -// #define read_lock_irq(lock) _read_lock_irq(lock) -// #define read_lock_bh(lock) _read_lock_bh(lock) -#define read_lock_irq(lock) PICK_RW_OP(read, _lock_irq, lock) -#define read_lock_bh(lock) PICK_RW_OP(read, _lock_bh, lock) - -// #define write_lock_irq(lock) _write_lock_irq(lock) -// #define write_lock_bh(lock) _write_lock_bh(lock) -#define write_lock_irq(lock) PICK_RW_OP(write, _lock_irq, lock) -#define write_lock_bh(lock) PICK_RW_OP(write, _lock_bh, lock) - -// #define spin_unlock(lock) _spin_unlock(lock) -// #define write_unlock(lock) _write_unlock(lock) -// #define read_unlock(lock) _read_unlock(lock) -#define spin_unlock(lock) PICK_OP(_unlock, lock) -#define read_unlock(lock) PICK_RW_OP(read, _unlock, lock) -#define write_unlock(lock) PICK_RW_OP(write, _unlock, lock) +#define spin_lock_irq(lock) PICK_SPIN_OP(__spin_lock_irq, _spin_lock_irq, lock) -// #define spin_unlock(lock) _spin_unlock_no_resched(lock) -#define spin_unlock_no_resched(lock) \ - PICK_OP(_unlock_no_resched, lock) +#define spin_lock_bh(lock) PICK_SPIN_OP(__spin_lock_bh, _spin_lock_bh, lock) -//#define spin_unlock_irqrestore(lock, flags) -// _spin_unlock_irqrestore(lock, flags) -//#define spin_unlock_irq(lock) _spin_unlock_irq(lock) -//#define spin_unlock_bh(lock) _spin_unlock_bh(lock) -#define spin_unlock_irqrestore(lock, flags) \ -do { \ - BUILD_CHECK_IRQ_FLAGS(flags); \ - PICK_OP2(_unlock_irqrestore, lock, flags); \ -} while (0) +#define read_lock_irq(lock) PICK_RW_OP(__read_lock_irq, _read_lock_irq, lock) -#define spin_unlock_irq(lock) PICK_OP(_unlock_irq, lock) -#define spin_unlock_bh(lock) PICK_OP(_unlock_bh, lock) +#define read_lock_bh(lock) PICK_RW_OP(__read_lock_bh, _read_lock_bh, lock) -// #define read_unlock_irqrestore(lock, flags) -// _read_unlock_irqrestore(lock, flags) -// #define read_unlock_irq(lock) _read_unlock_irq(lock) -// #define read_unlock_bh(lock) _read_unlock_bh(lock) -#define read_unlock_irqrestore(lock, flags) \ -do { \ - BUILD_CHECK_IRQ_FLAGS(flags); \ - PICK_RW_OP2(read, _unlock_irqrestore, lock, flags); \ +#define write_lock_irq(lock) PICK_RW_OP(__write_lock_irq, _write_lock_irq, lock) + +#define write_lock_bh(lock) PICK_RW_OP(__write_lock_bh, _write_lock_bh, lock) + +#define spin_unlock(lock) PICK_SPIN_OP(__spin_unlock, _spin_unlock, lock) + +#define read_unlock(lock) PICK_RW_OP(__read_unlock, _read_unlock, lock) + +#define write_unlock(lock) PICK_RW_OP(__write_unlock, _write_unlock, lock) + +#define spin_unlock_no_resched(lock) \ + PICK_SPIN_OP(__spin_unlock_no_resched, _spin_unlock_no_resched, lock) + +#define spin_unlock_irqrestore(lock, flags) \ +do { \ + BUILD_CHECK_IRQ_FLAGS(flags); \ + PICK_SPIN_OP(__spin_unlock_irqrestore, _spin_unlock_irqrestore, \ + lock, flags); \ } while (0) -#define read_unlock_irq(lock) PICK_RW_OP(read, _unlock_irq, lock) -#define read_unlock_bh(lock) PICK_RW_OP(read, _unlock_bh, lock) +#define spin_unlock_irq(lock) \ + PICK_SPIN_OP(__spin_unlock_irq, _spin_unlock_irq, lock) +#define spin_unlock_bh(lock) \ + PICK_SPIN_OP(__spin_unlock_bh, _spin_unlock_bh, lock) -// #define write_unlock_irqrestore(lock, flags) -// _write_unlock_irqrestore(lock, flags) -// #define write_unlock_irq(lock) _write_unlock_irq(lock) -// #define write_unlock_bh(lock) _write_unlock_bh(lock) -#define write_unlock_irqrestore(lock, flags) \ -do { \ - BUILD_CHECK_IRQ_FLAGS(flags); \ - PICK_RW_OP2(write, _unlock_irqrestore, lock, flags); \ +#define read_unlock_irqrestore(lock, flags) \ +do { \ + BUILD_CHECK_IRQ_FLAGS(flags); \ + PICK_RW_OP(__read_unlock_irqrestore, _read_unlock_irqrestore, \ + lock, flags); \ } while (0) -#define write_unlock_irq(lock) PICK_RW_OP(write, _unlock_irq, lock) -#define write_unlock_bh(lock) PICK_RW_OP(write, _unlock_bh, lock) -// #define spin_trylock_bh(lock) _spin_trylock_bh(lock) -#define spin_trylock_bh(lock) __cond_lock(lock, PICK_OP_RET(_trylock_bh, lock)) +#define read_unlock_irq(lock) \ + PICK_RW_OP(__read_unlock_irq, _read_unlock_irq, lock) +#define read_unlock_bh(lock) PICK_RW_OP(__read_unlock_bh, _read_unlock_bh, lock) -// #define spin_trylock_irq(lock) +#define write_unlock_irqrestore(lock, flags) \ +do { \ + BUILD_CHECK_IRQ_FLAGS(flags); \ + PICK_RW_OP(__write_unlock_irqrestore, _write_unlock_irqrestore, \ + lock, flags); \ +} while (0) +#define write_unlock_irq(lock) \ + PICK_RW_OP(__write_unlock_irq, _write_unlock_irq, lock) -#define spin_trylock_irq(lock) __cond_lock(lock, PICK_OP_RET(_trylock_irq, lock)) +#define write_unlock_bh(lock) \ + PICK_RW_OP(__write_unlock_bh, _write_unlock_bh, lock) -// #define spin_trylock_irqsave(lock, flags) +#define spin_trylock_bh(lock) \ + __cond_lock(lock, PICK_SPIN_OP_RET(__spin_trylock_bh, _spin_trylock_bh,\ + lock)) + +#define spin_trylock_irq(lock) \ + __cond_lock(lock, PICK_SPIN_OP_RET(__spin_trylock_irq, \ + __spin_trylock_irq, lock)) #define spin_trylock_irqsave(lock, flags) \ - __cond_lock(lock, PICK_OP2_RET(_trylock_irqsave, lock, &flags)) + __cond_lock(lock, PICK_SPIN_OP_RET(__spin_trylock_irqsave, \ + _spin_trylock_irqsave, lock, &flags)) /* "lock on reference count zero" */ #ifndef ATOMIC_DEC_AND_LOCK # include - extern int __atomic_dec_and_spin_lock(atomic_t *atomic, raw_spinlock_t *lock); + extern int __atomic_dec_and_spin_lock(raw_spinlock_t *lock, atomic_t *atomic); #endif #define atomic_dec_and_lock(atomic, lock) \ -__cond_lock(lock, ({ \ - unsigned long __ret; \ - \ - if (TYPE_EQUAL(lock, raw_spinlock_t)) \ - __ret = __atomic_dec_and_spin_lock(atomic, \ - (raw_spinlock_t *)(lock)); \ - else if (TYPE_EQUAL(lock, spinlock_t)) \ - __ret = _atomic_dec_and_spin_lock(atomic, \ - (spinlock_t *)(lock)); \ - else __ret = __bad_spinlock_type(); \ - \ - __ret; \ -})) - + __cond_lock(lock, PICK_SPIN_OP_RET(__atomic_dec_and_spin_lock, \ + _atomic_dec_and_spin_lock, lock, atomic)) /* * bit-based spin_lock() Index: linux-2.6.22/kernel/rtmutex.c =================================================================== --- linux-2.6.22.orig/kernel/rtmutex.c +++ linux-2.6.22/kernel/rtmutex.c @@ -857,7 +857,7 @@ int __lockfunc rt_spin_trylock_irqsave(s } EXPORT_SYMBOL(rt_spin_trylock_irqsave); -int _atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock) +int _atomic_dec_and_spin_lock(spinlock_t *lock, atomic_t *atomic) { /* Subtract 1 from counter unless that drops it to 0 (ie. it was 1) */ if (atomic_add_unless(atomic, -1, 1)) Index: linux-2.6.22/lib/dec_and_lock.c =================================================================== --- linux-2.6.22.orig/lib/dec_and_lock.c +++ linux-2.6.22/lib/dec_and_lock.c @@ -17,7 +17,7 @@ * because the spin-lock and the decrement must be * "atomic". */ -int __atomic_dec_and_spin_lock(atomic_t *atomic, raw_spinlock_t *lock) +int __atomic_dec_and_spin_lock(raw_spinlock_t *lock, atomic_t *atomic) { #ifdef CONFIG_SMP /* Subtract 1 from counter unless that drops it to 0 (ie. it was 1) */ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/