/** * @file cpu_buffer.h * * @remark Copyright 2002 OProfile authors * @remark Read the file COPYING * * @author John Levon <levon@movementarian.org> */ #ifndef OPROFILE_CPU_BUFFER_H#define OPROFILE_CPU_BUFFER_H #include <linux/types.h>#include <linux/spinlock.h>#include <linux/workqueue.h>#include <linux/cache.h> struct task_struct; int alloc_cpu_buffers(void);void free_cpu_buffers(void); void start_cpu_work(void);void end_cpu_work(void); /* CPU buffer is composed of such entries (which are * also used for context switch notes) */struct op_sample {	unsigned long eip;	unsigned long event;}; struct oprofile_cpu_buffer {	volatile unsigned long head_pos;	volatile unsigned long tail_pos;	unsigned long buffer_size;	struct task_struct * last_task;	int last_is_kernel;	int tracing;	struct op_sample * buffer;	unsigned long sample_received;	unsigned long sample_lost_overflow;	unsigned long backtrace_aborted;	int cpu;	struct delayed_work work;} ____cacheline_aligned; extern struct oprofile_cpu_buffer cpu_buffer[]; void cpu_buffer_reset(struct oprofile_cpu_buffer * cpu_buf); /* transient events for the CPU buffer -> event buffer */#define CPU_IS_KERNEL 1#define CPU_TRACE_BEGIN 2 #endif /* OPROFILE_CPU_BUFFER_H */