From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/arch/s390/lib/spinlock.c | 219 --------------------------------- 1 file changed, 219 deletions(-) delete mode 100644 ANDROID_3.4.5/arch/s390/lib/spinlock.c (limited to 'ANDROID_3.4.5/arch/s390/lib/spinlock.c') diff --git a/ANDROID_3.4.5/arch/s390/lib/spinlock.c b/ANDROID_3.4.5/arch/s390/lib/spinlock.c deleted file mode 100644 index 093eb694..00000000 --- a/ANDROID_3.4.5/arch/s390/lib/spinlock.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * arch/s390/lib/spinlock.c - * Out of line spinlock code. - * - * Copyright (C) IBM Corp. 2004, 2006 - * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) - */ - -#include -#include -#include -#include -#include -#include - -int spin_retry = 1000; - -/** - * spin_retry= parameter - */ -static int __init spin_retry_setup(char *str) -{ - spin_retry = simple_strtoul(str, &str, 0); - return 1; -} -__setup("spin_retry=", spin_retry_setup); - -void arch_spin_lock_wait(arch_spinlock_t *lp) -{ - int count = spin_retry; - unsigned int cpu = ~smp_processor_id(); - unsigned int owner; - - while (1) { - owner = lp->owner_cpu; - if (!owner || smp_vcpu_scheduled(~owner)) { - for (count = spin_retry; count > 0; count--) { - if (arch_spin_is_locked(lp)) - continue; - if (_raw_compare_and_swap(&lp->owner_cpu, 0, - cpu) == 0) - return; - } - if (MACHINE_IS_LPAR) - continue; - } - owner = lp->owner_cpu; - if (owner) - smp_yield_cpu(~owner); - if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0) - return; - } -} -EXPORT_SYMBOL(arch_spin_lock_wait); - -void arch_spin_lock_wait_flags(arch_spinlock_t *lp, unsigned long flags) -{ - int count = spin_retry; - unsigned int cpu = ~smp_processor_id(); - unsigned int owner; - - local_irq_restore(flags); - while (1) { - owner = lp->owner_cpu; - if (!owner || smp_vcpu_scheduled(~owner)) { - for (count = spin_retry; count > 0; count--) { - if (arch_spin_is_locked(lp)) - continue; - local_irq_disable(); - if (_raw_compare_and_swap(&lp->owner_cpu, 0, - cpu) == 0) - return; - local_irq_restore(flags); - } - if (MACHINE_IS_LPAR) - continue; - } - owner = lp->owner_cpu; - if (owner) - smp_yield_cpu(~owner); - local_irq_disable(); - if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0) - return; - local_irq_restore(flags); - } -} -EXPORT_SYMBOL(arch_spin_lock_wait_flags); - -int arch_spin_trylock_retry(arch_spinlock_t *lp) -{ - unsigned int cpu = ~smp_processor_id(); - int count; - - for (count = spin_retry; count > 0; count--) { - if (arch_spin_is_locked(lp)) - continue; - if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0) - return 1; - } - return 0; -} -EXPORT_SYMBOL(arch_spin_trylock_retry); - -void arch_spin_relax(arch_spinlock_t *lock) -{ - unsigned int cpu = lock->owner_cpu; - if (cpu != 0) { - if (MACHINE_IS_VM || MACHINE_IS_KVM || - !smp_vcpu_scheduled(~cpu)) - smp_yield_cpu(~cpu); - } -} -EXPORT_SYMBOL(arch_spin_relax); - -void _raw_read_lock_wait(arch_rwlock_t *rw) -{ - unsigned int old; - int count = spin_retry; - - while (1) { - if (count-- <= 0) { - smp_yield(); - count = spin_retry; - } - if (!arch_read_can_lock(rw)) - continue; - old = rw->lock & 0x7fffffffU; - if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old) - return; - } -} -EXPORT_SYMBOL(_raw_read_lock_wait); - -void _raw_read_lock_wait_flags(arch_rwlock_t *rw, unsigned long flags) -{ - unsigned int old; - int count = spin_retry; - - local_irq_restore(flags); - while (1) { - if (count-- <= 0) { - smp_yield(); - count = spin_retry; - } - if (!arch_read_can_lock(rw)) - continue; - old = rw->lock & 0x7fffffffU; - local_irq_disable(); - if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old) - return; - } -} -EXPORT_SYMBOL(_raw_read_lock_wait_flags); - -int _raw_read_trylock_retry(arch_rwlock_t *rw) -{ - unsigned int old; - int count = spin_retry; - - while (count-- > 0) { - if (!arch_read_can_lock(rw)) - continue; - old = rw->lock & 0x7fffffffU; - if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old) - return 1; - } - return 0; -} -EXPORT_SYMBOL(_raw_read_trylock_retry); - -void _raw_write_lock_wait(arch_rwlock_t *rw) -{ - int count = spin_retry; - - while (1) { - if (count-- <= 0) { - smp_yield(); - count = spin_retry; - } - if (!arch_write_can_lock(rw)) - continue; - if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0) - return; - } -} -EXPORT_SYMBOL(_raw_write_lock_wait); - -void _raw_write_lock_wait_flags(arch_rwlock_t *rw, unsigned long flags) -{ - int count = spin_retry; - - local_irq_restore(flags); - while (1) { - if (count-- <= 0) { - smp_yield(); - count = spin_retry; - } - if (!arch_write_can_lock(rw)) - continue; - local_irq_disable(); - if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0) - return; - } -} -EXPORT_SYMBOL(_raw_write_lock_wait_flags); - -int _raw_write_trylock_retry(arch_rwlock_t *rw) -{ - int count = spin_retry; - - while (count-- > 0) { - if (!arch_write_can_lock(rw)) - continue; - if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0) - return 1; - } - return 0; -} -EXPORT_SYMBOL(_raw_write_trylock_retry); -- cgit