[PATCH 4.5 023/101] samples/bpf: fix trace_output example

From: Greg Kroah-Hartman
Date: Mon May 16 2016 - 21:47:27 EST


4.5-stable review patch. If anyone has any objections, please let me know.

------------------

From: Alexei Starovoitov <ast@xxxxxx>

[ 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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
samples/bpf/trace_output_kern.c | 1 -
1 file changed, 1 deletion(-)

--- 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;