samples/bpf: change _kern suffix to .bpf with BPF test programs

This commit changes the _kern suffix to .bpf with the BPF test programs.
With this modification, test programs will inherit the benefit of the
new CLANG-BPF compile target.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Link: https://lore.kernel.org/r/20230115071613.125791-11-danieltimlee@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 62 deletions

diff --git a/samples/bpf/lwt_len_hist_kern.c b/samples/bpf/lwt_len_hist_kern.c
deleted file mode 100644
index dbab80e813fe..000000000000
--- a/samples/bpf/lwt_len_hist_kern.c
+++ /dev/null
@@ -1,62 +0,0 @@
-/* Copyright (c) 2016 Thomas Graf <tgraf@tgraf.ch>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- */
-
-#include "vmlinux.h"
-#include <bpf/bpf_helpers.h>
-
-struct {
-	__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
-	__type(key, u64);
-	__type(value, u64);
-	__uint(pinning, LIBBPF_PIN_BY_NAME);
-	__uint(max_entries, 1024);
-} lwt_len_hist_map SEC(".maps");
-
-static unsigned int log2(unsigned int v)
-{
-	unsigned int r;
-	unsigned int shift;
-
-	r = (v > 0xFFFF) << 4; v >>= r;
-	shift = (v > 0xFF) << 3; v >>= shift; r |= shift;
-	shift = (v > 0xF) << 2; v >>= shift; r |= shift;
-	shift = (v > 0x3) << 1; v >>= shift; r |= shift;
-	r |= (v >> 1);
-	return r;
-}
-
-static unsigned int log2l(unsigned long v)
-{
-	unsigned int hi = v >> 32;
-	if (hi)
-		return log2(hi) + 32;
-	else
-		return log2(v);
-}
-
-SEC("len_hist")
-int do_len_hist(struct __sk_buff *skb)
-{
-	__u64 *value, key, init_val = 1;
-
-	key = log2l(skb->len);
-
-	value = bpf_map_lookup_elem(&lwt_len_hist_map, &key);
-	if (value)
-		__sync_fetch_and_add(value, 1);
-	else
-		bpf_map_update_elem(&lwt_len_hist_map, &key, &init_val, BPF_ANY);
-
-	return BPF_OK;
-}
-
-char _license[] SEC("license") = "GPL";