linux-kernel - [PATCH] tracing, AER: Hide PCIe AER event when PCIEAER is not configured

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Message-ID: <20250612094932.4a08abd6@batman.local.home>
Date: Thu, 12 Jun 2025 09:49:32 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>, Linux trace kernel
 <linux-trace-kernel@...r.kernel.org>, linux-edac@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>, Borislav Petkov <bp@...en8.de>, Tony Luck
 <tony.luck@...el.com>
Subject: [PATCH] tracing, AER: Hide PCIe AER event when PCIEAER is not
 configured

From: Steven Rostedt <rostedt@...dmis.org>

The event aer_event is only used when CONFIG_PCIEAER is configured. It
should not be created when it is not. When an event is created it creates
around 5K of text and meta data regardless if the tracepoint is used or
not. Instead of wasting this memory, put #ifdef around the event to not
create it when it is not used.

Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
Note, I will be adding code soon that will make unused events cause a warning.

 include/ras/ras_event.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index 14c9f943d53f..c8cd0f00c845 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -252,6 +252,7 @@ TRACE_EVENT(non_standard_event,
 		  __print_hex(__get_dynamic_array(buf), __entry->len))
 );
 
+#ifdef CONFIG_PCIEAER
 /*
  * PCIe AER Trace event
  *
@@ -337,6 +338,7 @@ TRACE_EVENT(aer_event,
 			__print_array(__entry->tlp_header, PCIE_STD_MAX_TLP_HEADERLOG, 4) :
 			"Not available")
 );
+#endif /* CONFIG_PCIEAER */
 
 /*
  * memory-failure recovery action result event
-- 
2.47.2