linux-kernel - [PATCH] tracepoint: Print the function symbol when tracepoint

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Message-Id: <20250304101843.12562-1-shijie@os.amperecomputing.com>
Date: Tue,  4 Mar 2025 18:18:43 +0800
From: Huang Shijie <shijie@...amperecomputing.com>
To: rostedt@...dmis.org
Cc: patches@...erecomputing.com,
	cl@...ux.com,
	yang@...amperecomputing.com,
	mathieu.desnoyers@...icios.com,
	peterz@...radead.org,
	jpoimboe@...nel.org,
	linux-kernel@...r.kernel.org,
	Huang Shijie <shijie@...amperecomputing.com>
Subject: [PATCH] tracepoint: Print the function symbol when tracepoint_debug is set

When tracepoint_debug is set, we may get the output in kernel log:
     [  380.013843] Probe 0 : 00000000f0d68cda

It is not readable, so change to print the function symbol.
After this patch, the output may becomes:
     [   54.930567] Probe 0 : perf_trace_sched_wakeup_template

Reviewed-by: Christoph Lameter <cl@...ux.com>
Signed-off-by: Huang Shijie <shijie@...amperecomputing.com>
---
 kernel/tracepoint.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 1848ce7e2976..82bef4b9400a 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -127,7 +127,7 @@ static void debug_print_probes(struct tracepoint_func *funcs)
 		return;
 
 	for (i = 0; funcs[i].func; i++)
-		printk(KERN_DEBUG "Probe %d : %p\n", i, funcs[i].func);
+		printk(KERN_DEBUG "Probe %d : %ps\n", i, funcs[i].func);
 }
 
 static struct tracepoint_func *
-- 
2.40.1