From: Alexei Starovoitov <ast@fb.com>
Date: Thu, 28 Apr 2016 01:56:22 +0000 (-0700)
Subject: samples/bpf: fix trace_output example
X-Git-Tag: v4.5.5~79
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=59d0a01cc7af0c8556c64812a3429dc1e96cd006;p=thirdparty%2Fkernel%2Fstable.git

samples/bpf: fix trace_output example

[ Upstream commit 569cc39d39385a74b23145496bca2df5ac8b2fb8 ]

llvm cannot always recognize memset as builtin function and optimize
it away, so just delete it. It was a leftover from testing
of bpf_perf_event_output() with large data structures.

Fixes: 39111695b1b8 ("samples: bpf: add bpf_perf_event_output example")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/samples/bpf/trace_output_kern.c b/samples/bpf/trace_output_kern.c
index 8d8d1ec429eb6..9b96f4fb8cea6 100644
--- a/samples/bpf/trace_output_kern.c
+++ b/samples/bpf/trace_output_kern.c
@@ -18,7 +18,6 @@ int bpf_prog1(struct pt_regs *ctx)
 		u64 cookie;
 	} data;
 
-	memset(&data, 0, sizeof(data));
 	data.pid = bpf_get_current_pid_tgid();
 	data.cookie = 0x12345678;