tracing: Rename trace_buffer to array_buffer

As we are working to remove the generic "ring_buffer" name that is used by
both tracing and perf, the ring_buffer name for tracing will be renamed to
trace_buffer, and perf's ring buffer will be renamed to perf_buffer.

As there already exists a trace_buffer that is used by the trace_arrays, it
needs to be first renamed to array_buffer.

Link: https://lore.kernel.org/r/20191213153553.GE20583@kravaSigned-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

include/linux/trace_events.h

@@ -11,7 +11,7 @@
 #include <linux/tracepoint.h>
 
 struct trace_array;
-struct trace_buffer;
+struct array_buffer;
 struct tracer;
 struct dentry;
 struct bpf_prog;
@@ -79,7 +79,7 @@ struct trace_entry {
 struct trace_iterator {
 	struct trace_array	*tr;
 	struct tracer		*trace;
-	struct trace_buffer	*trace_buffer;
+	struct array_buffer	*array_buffer;
 	void			*private;
 	int			cpu_file;
 	struct mutex		mutex;

kernel/trace/blktrace.c

@@ -75,7 +75,7 @@ static void trace_note(struct blk_trace *bt, pid_t pid, int action,
 	ssize_t cgid_len = cgid ? sizeof(cgid) : 0;
 
 	if (blk_tracer) {
-		buffer = blk_tr->trace_buffer.buffer;
+		buffer = blk_tr->array_buffer.buffer;
 		pc = preempt_count();
 		event = trace_buffer_lock_reserve(buffer, TRACE_BLK,
 						  sizeof(*t) + len + cgid_len,
@@ -248,7 +248,7 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
 	if (blk_tracer) {
 		tracing_record_cmdline(current);
 
-		buffer = blk_tr->trace_buffer.buffer;
+		buffer = blk_tr->array_buffer.buffer;
 		pc = preempt_count();
 		event = trace_buffer_lock_reserve(buffer, TRACE_BLK,
 						  sizeof(*t) + pdu_len + cgid_len,

kernel/trace/ftrace.c

@@ -146,7 +146,7 @@ static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip,
 {
 	struct trace_array *tr = op->private;
 
-	if (tr && this_cpu_read(tr->trace_buffer.data->ftrace_ignore_pid))
+	if (tr && this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid))
 		return;
 
 	op->saved_func(ip, parent_ip, op, regs);
@@ -6922,7 +6922,7 @@ ftrace_filter_pid_sched_switch_probe(void *data, bool preempt,
 
 	pid_list = rcu_dereference_sched(tr->function_pids);
 
-	this_cpu_write(tr->trace_buffer.data->ftrace_ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ftrace_ignore_pid,
 		       trace_ignore_this_task(pid_list, next));
 }
 
@@ -6976,7 +6976,7 @@ static void clear_ftrace_pids(struct trace_array *tr)
 	unregister_trace_sched_switch(ftrace_filter_pid_sched_switch_probe, tr);
 
 	for_each_possible_cpu(cpu)
-		per_cpu_ptr(tr->trace_buffer.data, cpu)->ftrace_ignore_pid = false;
+		per_cpu_ptr(tr->array_buffer.data, cpu)->ftrace_ignore_pid = false;
 
 	rcu_assign_pointer(tr->function_pids, NULL);
 
@@ -7100,7 +7100,7 @@ static void ignore_task_cpu(void *data)
 	pid_list = rcu_dereference_protected(tr->function_pids,
 					     mutex_is_locked(&ftrace_lock));
 
-	this_cpu_write(tr->trace_buffer.data->ftrace_ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ftrace_ignore_pid,
 		       trace_ignore_this_task(pid_list, current));
 }
 

kernel/trace/trace.h

@@ -176,7 +176,7 @@ struct trace_array_cpu {
 struct tracer;
 struct trace_option_dentry;
 
-struct trace_buffer {
+struct array_buffer {
 	struct trace_array		*tr;
 	struct ring_buffer		*buffer;
 	struct trace_array_cpu __percpu	*data;
@@ -249,7 +249,7 @@ struct cond_snapshot {
 struct trace_array {
 	struct list_head	list;
 	char			*name;
-	struct trace_buffer	trace_buffer;
+	struct array_buffer	array_buffer;
 #ifdef CONFIG_TRACER_MAX_TRACE
 	/*
 	 * The max_buffer is used to snapshot the trace when a maximum
@@ -257,12 +257,12 @@ struct trace_array {
 	 * Some tracers will use this to store a maximum trace while
 	 * it continues examining live traces.
 	 *
-	 * The buffers for the max_buffer are set up the same as the trace_buffer
+	 * The buffers for the max_buffer are set up the same as the array_buffer
 	 * When a snapshot is taken, the buffer of the max_buffer is swapped
-	 * with the buffer of the trace_buffer and the buffers are reset for
-	 * the trace_buffer so the tracing can continue.
+	 * with the buffer of the array_buffer and the buffers are reset for
+	 * the array_buffer so the tracing can continue.
 	 */
-	struct trace_buffer	max_buffer;
+	struct array_buffer	max_buffer;
 	bool			allocated_snapshot;
 #endif
 #if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER)
@@ -685,7 +685,7 @@ trace_buffer_iter(struct trace_iterator *iter, int cpu)
 
 int tracer_init(struct tracer *t, struct trace_array *tr);
 int tracing_is_enabled(void);
-void tracing_reset_online_cpus(struct trace_buffer *buf);
+void tracing_reset_online_cpus(struct array_buffer *buf);
 void tracing_reset_current(int cpu);
 void tracing_reset_all_online_cpus(void);
 int tracing_open_generic(struct inode *inode, struct file *filp);
@@ -1057,7 +1057,7 @@ struct ftrace_func_command {
 extern bool ftrace_filter_param __initdata;
 static inline int ftrace_trace_task(struct trace_array *tr)
 {
-	return !this_cpu_read(tr->trace_buffer.data->ftrace_ignore_pid);
+	return !this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid);
 }
 extern int ftrace_is_dead(void);
 int ftrace_create_function_files(struct trace_array *tr,

kernel/trace/trace_branch.c

@@ -55,12 +55,12 @@ probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
 
 	raw_local_irq_save(flags);
 	current->trace_recursion |= TRACE_BRANCH_BIT;
-	data = this_cpu_ptr(tr->trace_buffer.data);
+	data = this_cpu_ptr(tr->array_buffer.data);
 	if (atomic_read(&data->disabled))
 		goto out;
 
 	pc = preempt_count();
-	buffer = tr->trace_buffer.buffer;
+	buffer = tr->array_buffer.buffer;
 	event = trace_buffer_lock_reserve(buffer, TRACE_BRANCH,
 					  sizeof(*entry), flags, pc);
 	if (!event)

kernel/trace/trace_events.c

@@ -237,7 +237,7 @@ bool trace_event_ignore_this_pid(struct trace_event_file *trace_file)
 	if (!pid_list)
 		return false;
 
-	data = this_cpu_ptr(tr->trace_buffer.data);
+	data = this_cpu_ptr(tr->array_buffer.data);
 
 	return data->ignore_pid;
 }
@@ -546,7 +546,7 @@ event_filter_pid_sched_switch_probe_pre(void *data, bool preempt,
 
 	pid_list = rcu_dereference_sched(tr->filtered_pids);
 
-	this_cpu_write(tr->trace_buffer.data->ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ignore_pid,
 		       trace_ignore_this_task(pid_list, prev) &&
 		       trace_ignore_this_task(pid_list, next));
 }
@@ -560,7 +560,7 @@ event_filter_pid_sched_switch_probe_post(void *data, bool preempt,
 
 	pid_list = rcu_dereference_sched(tr->filtered_pids);
 
-	this_cpu_write(tr->trace_buffer.data->ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ignore_pid,
 		       trace_ignore_this_task(pid_list, next));
 }
 
@@ -571,12 +571,12 @@ event_filter_pid_sched_wakeup_probe_pre(void *data, struct task_struct *task)
 	struct trace_pid_list *pid_list;
 
 	/* Nothing to do if we are already tracing */
-	if (!this_cpu_read(tr->trace_buffer.data->ignore_pid))
+	if (!this_cpu_read(tr->array_buffer.data->ignore_pid))
 		return;
 
 	pid_list = rcu_dereference_sched(tr->filtered_pids);
 
-	this_cpu_write(tr->trace_buffer.data->ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ignore_pid,
 		       trace_ignore_this_task(pid_list, task));
 }
 
@@ -587,13 +587,13 @@ event_filter_pid_sched_wakeup_probe_post(void *data, struct task_struct *task)
 	struct trace_pid_list *pid_list;
 
 	/* Nothing to do if we are not tracing */
-	if (this_cpu_read(tr->trace_buffer.data->ignore_pid))
+	if (this_cpu_read(tr->array_buffer.data->ignore_pid))
 		return;
 
 	pid_list = rcu_dereference_sched(tr->filtered_pids);
 
 	/* Set tracing if current is enabled */
-	this_cpu_write(tr->trace_buffer.data->ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ignore_pid,
 		       trace_ignore_this_task(pid_list, current));
 }
 
@@ -625,7 +625,7 @@ static void __ftrace_clear_event_pids(struct trace_array *tr)
 	}
 
 	for_each_possible_cpu(cpu)
-		per_cpu_ptr(tr->trace_buffer.data, cpu)->ignore_pid = false;
+		per_cpu_ptr(tr->array_buffer.data, cpu)->ignore_pid = false;
 
 	rcu_assign_pointer(tr->filtered_pids, NULL);
 
@@ -1594,7 +1594,7 @@ static void ignore_task_cpu(void *data)
 	pid_list = rcu_dereference_protected(tr->filtered_pids,
 					     mutex_is_locked(&event_mutex));
 
-	this_cpu_write(tr->trace_buffer.data->ignore_pid,
+	this_cpu_write(tr->array_buffer.data->ignore_pid,
 		       trace_ignore_this_task(pid_list, current));
 }
 

kernel/trace/trace_events_hist.c

@@ -895,7 +895,7 @@ static notrace void trace_event_raw_event_synth(void *__data,
 	 * Avoid ring buffer recursion detection, as this event
 	 * is being performed within another event.
 	 */
-	buffer = trace_file->tr->trace_buffer.buffer;
+	buffer = trace_file->tr->array_buffer.buffer;
 	ring_buffer_nest_start(buffer);
 
 	entry = trace_event_buffer_reserve(&fbuffer, trace_file,

kernel/trace/trace_functions.c

@@ -101,7 +101,7 @@ static int function_trace_init(struct trace_array *tr)
 
 	ftrace_init_array_ops(tr, func);
 
-	tr->trace_buffer.cpu = get_cpu();
+	tr->array_buffer.cpu = get_cpu();
 	put_cpu();
 
 	tracing_start_cmdline_record();
@@ -118,7 +118,7 @@ static void function_trace_reset(struct trace_array *tr)
 
 static void function_trace_start(struct trace_array *tr)
 {
-	tracing_reset_online_cpus(&tr->trace_buffer);
+	tracing_reset_online_cpus(&tr->array_buffer);
 }
 
 static void
@@ -143,7 +143,7 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
 		goto out;
 
 	cpu = smp_processor_id();
-	data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	data = per_cpu_ptr(tr->array_buffer.data, cpu);
 	if (!atomic_read(&data->disabled)) {
 		local_save_flags(flags);
 		trace_function(tr, ip, parent_ip, flags, pc);
@@ -192,7 +192,7 @@ function_stack_trace_call(unsigned long ip, unsigned long parent_ip,
 	 */
 	local_irq_save(flags);
 	cpu = raw_smp_processor_id();
-	data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	data = per_cpu_ptr(tr->array_buffer.data, cpu);
 	disabled = atomic_inc_return(&data->disabled);
 
 	if (likely(disabled == 1)) {

kernel/trace/trace_functions_graph.c

@@ -101,7 +101,7 @@ int __trace_graph_entry(struct trace_array *tr,
 {
 	struct trace_event_call *call = &event_funcgraph_entry;
 	struct ring_buffer_event *event;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 	struct ftrace_graph_ent_entry *entry;
 
 	event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_ENT,
@@ -171,7 +171,7 @@ int trace_graph_entry(struct ftrace_graph_ent *trace)
 
 	local_irq_save(flags);
 	cpu = raw_smp_processor_id();
-	data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	data = per_cpu_ptr(tr->array_buffer.data, cpu);
 	disabled = atomic_inc_return(&data->disabled);
 	if (likely(disabled == 1)) {
 		pc = preempt_count();
@@ -221,7 +221,7 @@ void __trace_graph_return(struct trace_array *tr,
 {
 	struct trace_event_call *call = &event_funcgraph_exit;
 	struct ring_buffer_event *event;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 	struct ftrace_graph_ret_entry *entry;
 
 	event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_RET,
@@ -252,7 +252,7 @@ void trace_graph_return(struct ftrace_graph_ret *trace)
 
 	local_irq_save(flags);
 	cpu = raw_smp_processor_id();
-	data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	data = per_cpu_ptr(tr->array_buffer.data, cpu);
 	disabled = atomic_inc_return(&data->disabled);
 	if (likely(disabled == 1)) {
 		pc = preempt_count();
@@ -444,9 +444,9 @@ get_return_for_leaf(struct trace_iterator *iter,
 			 * We need to consume the current entry to see
 			 * the next one.
 			 */
-			ring_buffer_consume(iter->trace_buffer->buffer, iter->cpu,
+			ring_buffer_consume(iter->array_buffer->buffer, iter->cpu,
 					    NULL, NULL);
-			event = ring_buffer_peek(iter->trace_buffer->buffer, iter->cpu,
+			event = ring_buffer_peek(iter->array_buffer->buffer, iter->cpu,
 						 NULL, NULL);
 		}
 
@@ -503,7 +503,7 @@ print_graph_rel_time(struct trace_iterator *iter, struct trace_seq *s)
 {
 	unsigned long long usecs;
 
-	usecs = iter->ts - iter->trace_buffer->time_start;
+	usecs = iter->ts - iter->array_buffer->time_start;
 	do_div(usecs, NSEC_PER_USEC);
 
 	trace_seq_printf(s, "%9llu us |  ", usecs);

kernel/trace/trace_hwlat.c

@@ -104,7 +104,7 @@ static void trace_hwlat_sample(struct hwlat_sample *sample)
 {
 	struct trace_array *tr = hwlat_trace;
 	struct trace_event_call *call = &event_hwlat;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 	struct ring_buffer_event *event;
 	struct hwlat_entry *entry;
 	unsigned long flags;

kernel/trace/trace_irqsoff.c

@@ -122,7 +122,7 @@ static int func_prolog_dec(struct trace_array *tr,
 	if (!irqs_disabled_flags(*flags) && !preempt_count())
 		return 0;
 
-	*data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	*data = per_cpu_ptr(tr->array_buffer.data, cpu);
 	disabled = atomic_inc_return(&(*data)->disabled);
 
 	if (likely(disabled == 1))
@@ -167,7 +167,7 @@ static int irqsoff_display_graph(struct trace_array *tr, int set)
 		per_cpu(tracing_cpu, cpu) = 0;
 
 	tr->max_latency = 0;
-	tracing_reset_online_cpus(&irqsoff_trace->trace_buffer);
+	tracing_reset_online_cpus(&irqsoff_trace->array_buffer);
 
 	return start_irqsoff_tracer(irqsoff_trace, set);
 }
@@ -382,7 +382,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip, int pc)
 	if (per_cpu(tracing_cpu, cpu))
 		return;
 
-	data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	data = per_cpu_ptr(tr->array_buffer.data, cpu);
 
 	if (unlikely(!data) || atomic_read(&data->disabled))
 		return;
@@ -420,7 +420,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip, int pc)
 	if (!tracer_enabled || !tracing_is_enabled())
 		return;
 
-	data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	data = per_cpu_ptr(tr->array_buffer.data, cpu);
 
 	if (unlikely(!data) ||
 	    !data->critical_start || atomic_read(&data->disabled))

kernel/trace/trace_kdb.c

@@ -43,7 +43,7 @@ static void ftrace_dump_buf(int skip_entries, long cpu_file)
 	if (cpu_file == RING_BUFFER_ALL_CPUS) {
 		for_each_tracing_cpu(cpu) {
 			iter.buffer_iter[cpu] =
-			ring_buffer_read_prepare(iter.trace_buffer->buffer,
+			ring_buffer_read_prepare(iter.array_buffer->buffer,
 						 cpu, GFP_ATOMIC);
 			ring_buffer_read_start(iter.buffer_iter[cpu]);
 			tracing_iter_reset(&iter, cpu);
@@ -51,7 +51,7 @@ static void ftrace_dump_buf(int skip_entries, long cpu_file)
 	} else {
 		iter.cpu_file = cpu_file;
 		iter.buffer_iter[cpu_file] =
-			ring_buffer_read_prepare(iter.trace_buffer->buffer,
+			ring_buffer_read_prepare(iter.array_buffer->buffer,
 						 cpu_file, GFP_ATOMIC);
 		ring_buffer_read_start(iter.buffer_iter[cpu_file]);
 		tracing_iter_reset(&iter, cpu_file);
@@ -124,7 +124,7 @@ static int kdb_ftdump(int argc, const char **argv)
 	iter.buffer_iter = buffer_iter;
 
 	for_each_tracing_cpu(cpu) {
-		atomic_inc(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
+		atomic_inc(&per_cpu_ptr(iter.array_buffer->data, cpu)->disabled);
 	}
 
 	/* A negative skip_entries means skip all but the last entries */
@@ -139,7 +139,7 @@ static int kdb_ftdump(int argc, const char **argv)
 	ftrace_dump_buf(skip_entries, cpu_file);
 
 	for_each_tracing_cpu(cpu) {
-		atomic_dec(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
+		atomic_dec(&per_cpu_ptr(iter.array_buffer->data, cpu)->disabled);
 	}
 
 	kdb_trap_printk--;

kernel/trace/trace_mmiotrace.c

@@ -32,7 +32,7 @@ static void mmio_reset_data(struct trace_array *tr)
 	overrun_detected = false;
 	prev_overruns = 0;
 
-	tracing_reset_online_cpus(&tr->trace_buffer);
+	tracing_reset_online_cpus(&tr->array_buffer);
 }
 
 static int mmio_trace_init(struct trace_array *tr)
@@ -122,7 +122,7 @@ static void mmio_close(struct trace_iterator *iter)
 static unsigned long count_overruns(struct trace_iterator *iter)
 {
 	unsigned long cnt = atomic_xchg(&dropped_count, 0);
-	unsigned long over = ring_buffer_overruns(iter->trace_buffer->buffer);
+	unsigned long over = ring_buffer_overruns(iter->array_buffer->buffer);
 
 	if (over > prev_overruns)
 		cnt += over - prev_overruns;
@@ -297,7 +297,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
 				struct mmiotrace_rw *rw)
 {
 	struct trace_event_call *call = &event_mmiotrace_rw;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 	struct ring_buffer_event *event;
 	struct trace_mmiotrace_rw *entry;
 	int pc = preempt_count();
@@ -318,7 +318,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
 void mmio_trace_rw(struct mmiotrace_rw *rw)
 {
 	struct trace_array *tr = mmio_trace_array;
-	struct trace_array_cpu *data = per_cpu_ptr(tr->trace_buffer.data, smp_processor_id());
+	struct trace_array_cpu *data = per_cpu_ptr(tr->array_buffer.data, smp_processor_id());
 	__trace_mmiotrace_rw(tr, data, rw);
 }
 
@@ -327,7 +327,7 @@ static void __trace_mmiotrace_map(struct trace_array *tr,
 				struct mmiotrace_map *map)
 {
 	struct trace_event_call *call = &event_mmiotrace_map;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 	struct ring_buffer_event *event;
 	struct trace_mmiotrace_map *entry;
 	int pc = preempt_count();
@@ -351,7 +351,7 @@ void mmio_trace_mapping(struct mmiotrace_map *map)
 	struct trace_array_cpu *data;
 
 	preempt_disable();
-	data = per_cpu_ptr(tr->trace_buffer.data, smp_processor_id());
+	data = per_cpu_ptr(tr->array_buffer.data, smp_processor_id());
 	__trace_mmiotrace_map(tr, data, map);
 	preempt_enable();
 }

kernel/trace/trace_output.c

@@ -538,7 +538,7 @@ lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
 	struct trace_array *tr = iter->tr;
 	unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
 	unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
-	unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
+	unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
 	unsigned long long rel_ts = next_ts - iter->ts;
 	struct trace_seq *s = &iter->seq;
 

kernel/trace/trace_sched_wakeup.c

@@ -82,7 +82,7 @@ func_prolog_preempt_disable(struct trace_array *tr,
 	if (cpu != wakeup_current_cpu)
 		goto out_enable;
 
-	*data = per_cpu_ptr(tr->trace_buffer.data, cpu);
+	*data = per_cpu_ptr(tr->array_buffer.data, cpu);
 	disabled = atomic_inc_return(&(*data)->disabled);
 	if (unlikely(disabled != 1))
 		goto out;
@@ -378,7 +378,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
 			   unsigned long flags, int pc)
 {
 	struct trace_event_call *call = &event_context_switch;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 	struct ring_buffer_event *event;
 	struct ctx_switch_entry *entry;
 
@@ -408,7 +408,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
 	struct trace_event_call *call = &event_wakeup;
 	struct ring_buffer_event *event;
 	struct ctx_switch_entry *entry;
-	struct ring_buffer *buffer = tr->trace_buffer.buffer;
+	struct ring_buffer *buffer = tr->array_buffer.buffer;
 
 	event = trace_buffer_lock_reserve(buffer, TRACE_WAKE,
 					  sizeof(*entry), flags, pc);
@@ -459,7 +459,7 @@ probe_wakeup_sched_switch(void *ignore, bool preempt,
 
 	/* disable local data, not wakeup_cpu data */
 	cpu = raw_smp_processor_id();
-	disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
+	disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->array_buffer.data, cpu)->disabled);
 	if (likely(disabled != 1))
 		goto out;
 
@@ -471,7 +471,7 @@ probe_wakeup_sched_switch(void *ignore, bool preempt,
 		goto out_unlock;
 
 	/* The task we are waiting for is waking up */
-	data = per_cpu_ptr(wakeup_trace->trace_buffer.data, wakeup_cpu);
+	data = per_cpu_ptr(wakeup_trace->array_buffer.data, wakeup_cpu);
 
 	__trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
 	tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc);
@@ -494,7 +494,7 @@ probe_wakeup_sched_switch(void *ignore, bool preempt,
 	arch_spin_unlock(&wakeup_lock);
 	local_irq_restore(flags);
 out:
-	atomic_dec(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
+	atomic_dec(&per_cpu_ptr(wakeup_trace->array_buffer.data, cpu)->disabled);
 }
 
 static void __wakeup_reset(struct trace_array *tr)
@@ -513,7 +513,7 @@ static void wakeup_reset(struct trace_array *tr)
 {
 	unsigned long flags;
 
-	tracing_reset_online_cpus(&tr->trace_buffer);
+	tracing_reset_online_cpus(&tr->array_buffer);
 
 	local_irq_save(flags);
 	arch_spin_lock(&wakeup_lock);
@@ -551,7 +551,7 @@ probe_wakeup(void *ignore, struct task_struct *p)
 		return;
 
 	pc = preempt_count();
-	disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
+	disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->array_buffer.data, cpu)->disabled);
 	if (unlikely(disabled != 1))
 		goto out;
 
@@ -583,7 +583,7 @@ probe_wakeup(void *ignore, struct task_struct *p)
 
 	local_save_flags(flags);
 
-	data = per_cpu_ptr(wakeup_trace->trace_buffer.data, wakeup_cpu);
+	data = per_cpu_ptr(wakeup_trace->array_buffer.data, wakeup_cpu);
 	data->preempt_timestamp = ftrace_now(cpu);
 	tracing_sched_wakeup_trace(wakeup_trace, p, current, flags, pc);
 	__trace_stack(wakeup_trace, flags, 0, pc);
@@ -598,7 +598,7 @@ probe_wakeup(void *ignore, struct task_struct *p)
 out_locked:
 	arch_spin_unlock(&wakeup_lock);
 out:
-	atomic_dec(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
+	atomic_dec(&per_cpu_ptr(wakeup_trace->array_buffer.data, cpu)->disabled);
 }
 
 static void start_wakeup_tracer(struct trace_array *tr)

kernel/trace/trace_selftest.c

@@ -23,7 +23,7 @@ static inline int trace_valid_entry(struct trace_entry *entry)
 	return 0;
 }
 
-static int trace_test_buffer_cpu(struct trace_buffer *buf, int cpu)
+static int trace_test_buffer_cpu(struct array_buffer *buf, int cpu)
 {
 	struct ring_buffer_event *event;
 	struct trace_entry *entry;
@@ -60,7 +60,7 @@ static int trace_test_buffer_cpu(struct trace_buffer *buf, int cpu)
  * Test the trace buffer to see if all the elements
  * are still sane.
  */
-static int __maybe_unused trace_test_buffer(struct trace_buffer *buf, unsigned long *count)
+static int __maybe_unused trace_test_buffer(struct array_buffer *buf, unsigned long *count)
 {
 	unsigned long flags, cnt = 0;
 	int cpu, ret = 0;
@@ -362,7 +362,7 @@ static int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
 	msleep(100);
 
 	/* we should have nothing in the buffer */
-	ret = trace_test_buffer(&tr->trace_buffer, &count);
+	ret = trace_test_buffer(&tr->array_buffer, &count);
 	if (ret)
 		goto out;
 
@@ -383,7 +383,7 @@ static int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
 	ftrace_enabled = 0;
 
 	/* check the trace buffer */
-	ret = trace_test_buffer(&tr->trace_buffer, &count);
+	ret = trace_test_buffer(&tr->array_buffer, &count);
 
 	ftrace_enabled = 1;
 	tracing_start();
@@ -682,7 +682,7 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
 	ftrace_enabled = 0;
 
 	/* check the trace buffer */
-	ret = trace_test_buffer(&tr->trace_buffer, &count);
+	ret = trace_test_buffer(&tr->array_buffer, &count);
 
 	ftrace_enabled = 1;
 	trace->reset(tr);
@@ -768,7 +768,7 @@ trace_selftest_startup_function_graph(struct tracer *trace,
 	 * Simulate the init() callback but we attach a watchdog callback
 	 * to detect and recover from possible hangs
 	 */
-	tracing_reset_online_cpus(&tr->trace_buffer);
+	tracing_reset_online_cpus(&tr->array_buffer);
 	set_graph_array(tr);
 	ret = register_ftrace_graph(&fgraph_ops);
 	if (ret) {
@@ -790,7 +790,7 @@ trace_selftest_startup_function_graph(struct tracer *trace,
 	tracing_stop();
 
 	/* check the trace buffer */
-	ret = trace_test_buffer(&tr->trace_buffer, &count);
+	ret = trace_test_buffer(&tr->array_buffer, &count);
 
 	/* Need to also simulate the tr->reset to remove this fgraph_ops */
 	tracing_stop_cmdline_record();
@@ -848,7 +848,7 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
+	ret = trace_test_buffer(&tr->array_buffer, NULL);
 	if (!ret)
 		ret = trace_test_buffer(&tr->max_buffer, &count);
 	trace->reset(tr);
@@ -910,7 +910,7 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
+	ret = trace_test_buffer(&tr->array_buffer, NULL);
 	if (!ret)
 		ret = trace_test_buffer(&tr->max_buffer, &count);
 	trace->reset(tr);
@@ -976,7 +976,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
+	ret = trace_test_buffer(&tr->array_buffer, NULL);
 	if (ret)
 		goto out;
 
@@ -1006,7 +1006,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
+	ret = trace_test_buffer(&tr->array_buffer, NULL);
 	if (ret)
 		goto out;
 
@@ -1136,7 +1136,7 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
 	/* stop the tracing. */
 	tracing_stop();
 	/* check both trace buffers */
-	ret = trace_test_buffer(&tr->trace_buffer, NULL);
+	ret = trace_test_buffer(&tr->array_buffer, NULL);
 	if (!ret)
 		ret = trace_test_buffer(&tr->max_buffer, &count);
 
@@ -1177,7 +1177,7 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
 	/* stop the tracing. */
 	tracing_stop();
 	/* check the trace buffer */
-	ret = trace_test_buffer(&tr->trace_buffer, &count);
+	ret = trace_test_buffer(&tr->array_buffer, &count);
 	trace->reset(tr);
 	tracing_start();
 

kernel/trace/trace_syscalls.c

@@ -345,7 +345,7 @@ static void ftrace_syscall_enter(void *data, struct pt_regs *regs, long id)
 	local_save_flags(irq_flags);
 	pc = preempt_count();
 
-	buffer = tr->trace_buffer.buffer;
+	buffer = tr->array_buffer.buffer;
 	event = trace_buffer_lock_reserve(buffer,
 			sys_data->enter_event->event.type, size, irq_flags, pc);
 	if (!event)
@@ -391,7 +391,7 @@ static void ftrace_syscall_exit(void *data, struct pt_regs *regs, long ret)
 	local_save_flags(irq_flags);
 	pc = preempt_count();
 
-	buffer = tr->trace_buffer.buffer;
+	buffer = tr->array_buffer.buffer;
 	event = trace_buffer_lock_reserve(buffer,
 			sys_data->exit_event->event.type, sizeof(*entry),
 			irq_flags, pc);