4.19-stable review patch. If anyone has any objections, please let me know.
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From: Quentin Perret quentin.perret@arm.com
commit 9e7382153f80ba45a0bbcd540fb77d4b15f6e966 upstream.
The following commit
441dae8f2f29 ("tracing: Add support for display of tgid in trace output")
removed the call to print_event_info() from print_func_help_header_irq() which results in the ftrace header not reporting the number of entries written in the buffer. As this wasn't the original intent of the patch, re-introduce the call to print_event_info() to restore the orginal behaviour.
Link: http://lkml.kernel.org/r/20190214152950.4179-1-quentin.perret@arm.com
Acked-by: Joel Fernandes joelaf@google.com Cc: stable@vger.kernel.org Fixes: 441dae8f2f29 ("tracing: Add support for display of tgid in trace output") Signed-off-by: Quentin Perret quentin.perret@arm.com Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- kernel/trace/trace.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3383,6 +3383,8 @@ static void print_func_help_header_irq(s const char tgid_space[] = " "; const char space[] = " ";
+ print_event_info(buf, m); + seq_printf(m, "# %s _-----=> irqs-off\n", tgid ? tgid_space : space); seq_printf(m, "# %s / _----=> need-resched\n",