diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/kernel/acpi/boot.c | 22 | ||||
| -rw-r--r-- | arch/ia64/kernel/cpufreq/acpi-cpufreq.c | 4 |
2 files changed, 23 insertions, 3 deletions
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c index c8f96cff07c..094300b3a81 100644 --- a/arch/i386/kernel/acpi/boot.c +++ b/arch/i386/kernel/acpi/boot.c @@ -1327,3 +1327,25 @@ static int __init setup_acpi_sci(char *s) return 0; } early_param("acpi_sci", setup_acpi_sci); + +int __acpi_acquire_global_lock(unsigned int *lock) +{ + unsigned int old, new, val; + do { + old = *lock; + new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); + val = cmpxchg(lock, old, new); + } while (unlikely (val != old)); + return (new < 3) ? -1 : 0; +} + +int __acpi_release_global_lock(unsigned int *lock) +{ + unsigned int old, new, val; + do { + old = *lock; + new = old & ~0x3; + val = cmpxchg(lock, old, new); + } while (unlikely (val != old)); + return old & 0x1; +} diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c index 088f130197a..15c08d52f09 100644 --- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c +++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c @@ -276,12 +276,10 @@ acpi_cpufreq_cpu_init ( dprintk("acpi_cpufreq_cpu_init\n"); - data = kmalloc(sizeof(struct cpufreq_acpi_io), GFP_KERNEL); + data = kzalloc(sizeof(struct cpufreq_acpi_io), GFP_KERNEL); if (!data) return (-ENOMEM); - memset(data, 0, sizeof(struct cpufreq_acpi_io)); - acpi_io_data[cpu] = data; result = acpi_processor_register_performance(&data->acpi_data, cpu); |