diff options
Diffstat (limited to 'arch/arm64/include/asm/smp.h')
-rw-r--r-- | arch/arm64/include/asm/smp.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index 2013a4dc5124..a05033beb2a2 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -16,11 +16,20 @@ #ifndef __ASM_SMP_H #define __ASM_SMP_H +#include <asm/percpu.h> + #include <linux/threads.h> #include <linux/cpumask.h> #include <linux/thread_info.h> -#define raw_smp_processor_id() (current_thread_info()->cpu) +DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); + +/* + * We don't use this_cpu_read(cpu_number) as that has implicit writes to + * preempt_count, and associated (compiler) barriers, that we'd like to avoid + * the expense of. If we're preemptible, the value can be stale at use anyway. + */ +#define raw_smp_processor_id() (*this_cpu_ptr(&cpu_number)) struct seq_file; @@ -57,6 +66,9 @@ asmlinkage void secondary_start_kernel(void); */ struct secondary_data { void *stack; +#ifdef CONFIG_THREAD_INFO_IN_TASK + struct task_struct *task; +#endif }; extern struct secondary_data secondary_data; extern void secondary_entry(void); |