redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

tracing: Apply soft-disabled and filter to tracepoints printk

Browse source 
Apply soft-disabled and the filter rule of the trace events to
the printk output of tracepoints (a.k.a. tp_printk kernel parameter)
as same as trace buffer output.

Link: http://lkml.kernel.org/r/157867231876.17873.15825819592284704068.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2020-01-11 01:05:18 +09:00 committed by Steven Rostedt (VMware)
parent 7b9b816f4b
commit d8d0c245a7
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
kernel/trace/trace.c
View file

@ -2610,6 +2610,7 @@ static DEFINE_MUTEX(tracepoint_printk_mutex);
static void output_printk(struct trace_event_buffer *fbuffer)
{
struct trace_event_call *event_call;
struct trace_event_file *file;
struct trace_event *event;
unsigned long flags;
struct trace_iterator *iter = tracepoint_print_iter;
@ -2623,6 +2624,12 @@ static void output_printk(struct trace_event_buffer *fbuffer)
!event_call->event.funcs->trace)
return;
file = fbuffer->trace_file;
if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags) ||
(unlikely(file->flags & EVENT_FILE_FL_FILTERED) &&
!filter_match_preds(file->filter, fbuffer->entry)))
return;
event = &fbuffer->trace_file->event_call->event;
spin_lock_irqsave(&tracepoint_iter_lock, flags);