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hc

2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/kernel/trace/trace_branch.c
..
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@@ -32,12 +32,12 @@
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 {
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 	struct trace_event_call *call = &event_branch;
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 	struct trace_array *tr = branch_tracer;
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+	struct trace_buffer *buffer;
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 	struct trace_array_cpu *data;
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 	struct ring_buffer_event *event;
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 	struct trace_branch *entry;
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-	struct ring_buffer *buffer;
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 	unsigned long flags;
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-	int pc;
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+	unsigned int trace_ctx;
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 	const char *p;
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 	if (current->trace_recursion & TRACE_BRANCH_BIT)
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@@ -55,14 +55,14 @@
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 	raw_local_irq_save(flags);
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 	current->trace_recursion |= TRACE_BRANCH_BIT;
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-	data = this_cpu_ptr(tr->trace_buffer.data);
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+	data = this_cpu_ptr(tr->array_buffer.data);
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 	if (atomic_read(&data->disabled))
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 		goto out;
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-	pc = preempt_count();
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-	buffer = tr->trace_buffer.buffer;
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+	trace_ctx = tracing_gen_ctx_flags(flags);
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+	buffer = tr->array_buffer.buffer;
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 	event = trace_buffer_lock_reserve(buffer, TRACE_BRANCH,
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-					  sizeof(*entry), flags, pc);
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+					  sizeof(*entry), trace_ctx);
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 	if (!event)
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 		goto out;
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..
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@@ -205,6 +205,8 @@
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 void ftrace_likely_update(struct ftrace_likely_data *f, int val,
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 			  int expect, int is_constant)
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 {
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+	unsigned long flags = user_access_save();
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+
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 	/* A constant is always correct */
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 	if (is_constant) {
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 		f->constant++;
..
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@@ -223,6 +225,8 @@
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 		f->data.correct++;
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 	else
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 		f->data.incorrect++;
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+
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+	user_access_restore(flags);
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 }
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 EXPORT_SYMBOL(ftrace_likely_update);
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..
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@@ -240,7 +244,7 @@
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 	return 0;
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 }
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-static inline long get_incorrect_percent(struct ftrace_branch_data *p)
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+static inline long get_incorrect_percent(const struct ftrace_branch_data *p)
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 {
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 	long percent;
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..
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@@ -328,10 +332,10 @@
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 	return p;
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 }
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-static int annotated_branch_stat_cmp(void *p1, void *p2)
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+static int annotated_branch_stat_cmp(const void *p1, const void *p2)
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 {
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-	struct ftrace_branch_data *a = p1;
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-	struct ftrace_branch_data *b = p2;
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+	const struct ftrace_branch_data *a = p1;
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+	const struct ftrace_branch_data *b = p2;
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 	long percent_a, percent_b;
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