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d6212d82bf
The selftests build four kernel modules which use copy-pasted Makefile targets. This is a bit messy, and doesn't scale so well when we add more modules, so let's consolidate these rules into a single rule generated for each module name, and move the module sources into a single directory. To avoid parallel builds of the different modules stepping on each other's toes during the 'modpost' phase of the Kbuild 'make modules', the module files should really be a grouped target. However, make only added explicit support for grouped targets in version 4.3, which is newer than the minimum version supported by the kernel. However, make implicitly treats pattern matching rules with multiple targets as a grouped target, so we can work around this by turning the rule into a pattern matching target. We do this by replacing '.ko' with '%ko' in the targets with subst(). Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Viktor Malik <vmalik@redhat.com> Link: https://lore.kernel.org/bpf/20241204-bpf-selftests-mod-compile-v5-1-b96231134a49@redhat.com
22 lines
684 B
C
22 lines
684 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include "../test_kmods/bpf_testmod.h"
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char _license[] SEC("license") = "GPL";
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/*
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* This subprogram validates that libbpf handles the situation in which BPF
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* object has subprograms in .text section, but has no entry BPF programs.
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* At some point that was causing issues due to legacy logic of treating such
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* subprogram as entry program (with unknown program type, which would fail).
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*/
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int dangling_subprog(void)
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{
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/* do nothing, just be here */
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return 0;
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}
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SEC(".struct_ops.link")
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struct bpf_testmod_ops testmod_do_detach;
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