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bpf: guard BPF_NO_PRESERVE_ACCESS_INDEX in skb_pkt_end.c

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This little patch is a follow-up to:
https://lore.kernel.org/bpf/20240507095011.15867-1-jose.marchesi@oracle.com/T/#u

The temporary workaround of passing -DBPF_NO_PRESERVE_ACCESS_INDEX
when building with GCC triggers a redefinition preprocessor error when
building progs/skb_pkt_end.c.  This patch adds a guard to avoid
redefinition.

Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
Cc: david.faust@oracle.com
Cc: cupertino.miranda@oracle.com
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20240508110332.17332-1-jose.marchesi@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jose E. Marchesi 2024-05-08 13:03:32 +02:00 committed by Alexei Starovoitov
parent 1209a523f6
commit 911edc69c8
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/bpf/progs/skb_pkt_end.c
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@ -1,5 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#ifndef BPF_NO_PRESERVE_ACCESS_INDEX
#define BPF_NO_PRESERVE_ACCESS_INDEX
#endif
#include <vmlinux.h>
#include <bpf/bpf_core_read.h>
#include <bpf/bpf_helpers.h>