From: "Daniel T. Lee" <danieltimlee@gmail.com>
Date: Thu, 5 Dec 2019 17:01:13 +0900
Subject: samples: bpf: Replace symbol compare of trace_event
Patch-mainline: v5.5-rc3
Git-commit: bba1b2a890253528c45aa66cf856f289a215bfbc
References: bsc#1155518

Previously, when this sample is added, commit 1c47910ef8013
("samples/bpf: add perf_event+bpf example"), a symbol 'sys_read' and
'sys_write' has been used without no prefixes. But currently there are
no exact symbols with these under kallsyms and this leads to failure.

This commit changes exact compare to substring compare to keep compatible
with exact symbol or prefixed symbol.

Fixes: 1c47910ef8013 ("samples/bpf: add perf_event+bpf example")
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191205080114.19766-2-danieltimlee@gmail.com
Acked-by: Gary Lin <glin@suse.com>
---
 samples/bpf/trace_event_user.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/samples/bpf/trace_event_user.c
+++ b/samples/bpf/trace_event_user.c
@@ -37,9 +37,9 @@ static void print_ksym(__u64 addr)
 	}
 
 	printf("%s;", sym->name);
-	if (!strcmp(sym->name, "sys_read"))
+	if (!strstr(sym->name, "sys_read"))
 		sys_read_seen = true;
-	else if (!strcmp(sym->name, "sys_write"))
+	else if (!strstr(sym->name, "sys_write"))
 		sys_write_seen = true;
 }