AcoSail/kernel_optimize_test
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tracing: Fix userstacktrace option for instances

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When the instances were able to use their own options, the userstacktrace
option was left hardcoded for the top level. This made the instance
userstacktrace option bascially into a nop, and will confuse users that set
it, but nothing happens (I was confused when it happened to me!)

Cc: stable@vger.kernel.org
Fixes: 16270145ce ("tracing: Add trace options for core options to instances")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2020-12-04 16:36:16 -05:00
parent 05227490c5
commit bcee527895
1 changed files with 8 additions and 5 deletions
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13
kernel/trace/trace.c
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@ -163,7 +163,8 @@ static union trace_eval_map_item *trace_eval_maps;
#endif /* CONFIG_TRACE_EVAL_MAP_FILE */
int tracing_set_tracer(struct trace_array *tr, const char *buf);
static void ftrace_trace_userstack(struct trace_buffer *buffer,
static void ftrace_trace_userstack(struct trace_array *tr,
struct trace_buffer *buffer,
unsigned long flags, int pc);
#define MAX_TRACER_SIZE 100
@ -2870,7 +2871,7 @@ void trace_buffer_unlock_commit_regs(struct trace_array *tr,
* two. They are not that meaningful.
*/
ftrace_trace_stack(tr, buffer, flags, regs ? 0 : STACK_SKIP, pc, regs);
ftrace_trace_userstack(buffer, flags, pc);
ftrace_trace_userstack(tr, buffer, flags, pc);
}
/*
@ -3056,13 +3057,14 @@ EXPORT_SYMBOL_GPL(trace_dump_stack);
static DEFINE_PER_CPU(int, user_stack_count);
static void
ftrace_trace_userstack(struct trace_buffer *buffer, unsigned long flags, int pc)
ftrace_trace_userstack(struct trace_array *tr,
struct trace_buffer *buffer, unsigned long flags, int pc)
{
struct trace_event_call *call = &event_user_stack;
struct ring_buffer_event *event;
struct userstack_entry *entry;
if (!(global_trace.trace_flags & TRACE_ITER_USERSTACKTRACE))
if (!(tr->trace_flags & TRACE_ITER_USERSTACKTRACE))
return;
/*
@ -3101,7 +3103,8 @@ ftrace_trace_userstack(struct trace_buffer *buffer, unsigned long flags, int pc)
preempt_enable();
}
#else /* CONFIG_USER_STACKTRACE_SUPPORT */
static void ftrace_trace_userstack(struct trace_buffer *buffer,
static void ftrace_trace_userstack(struct trace_array *tr,
struct trace_buffer *buffer,
unsigned long flags, int pc)
{
}