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Date:   Fri, 24 Jun 2022 07:31:35 +0900
From:   "Masami Hiramatsu (Google)" <>
To:     Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Andrii Nakryiko <>
Cc:     Masami Hiramatsu <>,
        Jiri Olsa <>,
        Steven Rostedt <>,,,
Subject: [PATCH bpf] fprobe, samples: Add module parameter descriptions

From: Masami Hiramatsu (Google) <>

Add module parameter descriptions for the fprobe_example module.

Signed-off-by: Masami Hiramatsu (Google) <>
 samples/fprobe/fprobe_example.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/samples/fprobe/fprobe_example.c b/samples/fprobe/fprobe_example.c
index 01ee6c8c8382..18b1e5c4b431 100644
--- a/samples/fprobe/fprobe_example.c
+++ b/samples/fprobe/fprobe_example.c
@@ -25,12 +25,19 @@ static unsigned long nhit;
 static char symbol[MAX_SYMBOL_LEN] = "kernel_clone";
 module_param_string(symbol, symbol, sizeof(symbol), 0644);
+MODULE_PARM_DESC(symbol, "Probed symbol(s), given by comma separated symbols or a wildcard pattern.");
 static char nosymbol[MAX_SYMBOL_LEN] = "";
 module_param_string(nosymbol, nosymbol, sizeof(nosymbol), 0644);
+MODULE_PARM_DESC(nosymbol, "Not-probed symbols, given by a wildcard pattern.");
 static bool stackdump = true;
 module_param(stackdump, bool, 0644);
+MODULE_PARM_DESC(stackdump, "Enable stackdump.");
 static bool use_trace = false;
 module_param(use_trace, bool, 0644);
+MODULE_PARM_DESC(use_trace, "Use trace_printk instead of printk. This is only for debugging.");
 static void show_backtrace(void)

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