linux-kernel - [PATCH v11 perf, bpf-next 9/9] bpf: add module name [bpf] to ksymbols for bpf programs

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Message-ID: <20190117161521.1341602-10-songliubraving@fb.com>
Date:   Thu, 17 Jan 2019 08:15:21 -0800
From:   Song Liu <songliubraving@...com>
To:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC:     Song Liu <songliubraving@...com>, <peterz@...radead.org>,
        <acme@...nel.org>, <ast@...nel.org>, <daniel@...earbox.net>,
        <kernel-team@...com>
Subject: [PATCH v11 perf, bpf-next 9/9] bpf: add module name [bpf] to ksymbols for bpf programs

With this patch, /proc/kallsyms will show BPF programs as

  <addr> t bpf_prog_<tag>_<name> [bpf]

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Song Liu <songliubraving@...com>
---
 kernel/kallsyms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index f3a04994e063..14934afa9e68 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -494,7 +494,7 @@ static int get_ksymbol_ftrace_mod(struct kallsym_iter *iter)
 
 static int get_ksymbol_bpf(struct kallsym_iter *iter)
 {
-	iter->module_name[0] = '\0';
+	strlcpy(iter->module_name, "bpf", MODULE_NAME_LEN);
 	iter->exported = 0;
 	return bpf_get_kallsym(iter->pos - iter->pos_ftrace_mod_end,
 			       &iter->value, &iter->type,
-- 
2.17.1