ring-buffer: Place duplicate expression into a single function

}

EXPORT_SYMBOL_GPL(ring_buffer_record_enable_cpu);

/*

 * The total entries in the ring buffer is the running counter

 * of entries entered into the ring buffer, minus the sum of

 * the entries read from the ring buffer and the number of

 * entries that were overwritten.

 */

static inline unsigned long

rb_num_of_entries(struct ring_buffer_per_cpu *cpu_buffer)

{

	return local_read(&cpu_buffer->entries) -

		(local_read(&cpu_buffer->overrun) + cpu_buffer->read);

}

/**

 * ring_buffer_entries_cpu - get the number of entries in a cpu buffer

 * @buffer: The ring buffer

unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu)

{

	struct ring_buffer_per_cpu *cpu_buffer;

	unsigned long ret;

	if (!cpumask_test_cpu(cpu, buffer->cpumask))

		return 0;

	cpu_buffer = buffer->buffers[cpu];

	ret = (local_read(&cpu_buffer->entries) - local_read(&cpu_buffer->overrun))

		- cpu_buffer->read;

	return ret;

	return rb_num_of_entries(cpu_buffer);

}

EXPORT_SYMBOL_GPL(ring_buffer_entries_cpu);

	/* if you care about this being correct, lock the buffer */

	for_each_buffer_cpu(buffer, cpu) {

		cpu_buffer = buffer->buffers[cpu];

		entries += (local_read(&cpu_buffer->entries) -

			    local_read(&cpu_buffer->overrun)) - cpu_buffer->read;

		entries += rb_num_of_entries(cpu_buffer);

	}

	return entries;