From patchwork Fri Aug 30 07:43:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Gladkov X-Patchwork-Id: 13784484 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8B3EB15C154; Fri, 30 Aug 2024 07:44:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725003869; cv=none; b=FsFe1pnU9rX8lRzNPceyVlgX78/nkgn7N8bcQR+uO12aFp8Ncoajw/L/kafwuLqC7pcbj4YiAKDqpgeujTqE9YJQkU1CXh1aqUIJu0pc9a8WTyt8SAXqXiBW8dfMsUYXZXYuIBSZEVqnii9julfKcryKRROXd4bcv9kMBOnmiZY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725003869; c=relaxed/simple; bh=ab9E8yRsVsHNSM1VcLw6wnCuw/OKKKTdW168xZIgIJ4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RW/Ur0TXMGZeinaiRxtKJ6z9jBXLrwl4Zx6SHX0P77ck2bBinXPDLjj4tM0xbXHroyo/mIQz3RimRbB+tuh96QyPyqcRNLkv2y8i2K5idnWzAS0C+4nVrihC3nierTpS+cx4S7L8QbUeaGkm0pOgCkcu1iHeeRyCaNlTPQVpxH0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XZQ7phyN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XZQ7phyN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 242F5C4CEC2; Fri, 30 Aug 2024 07:44:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725003869; bh=ab9E8yRsVsHNSM1VcLw6wnCuw/OKKKTdW168xZIgIJ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XZQ7phyNKtZDX4or/EXnonJV+IXRySCOITTQgFC3nAfJkGcwv5cBgyOgzkghlE4T/ OPVQVey6bW+y090lIzs3/L1XoZpsapLBMxQRlC8SqQppy3WB2OvE8gOsFqvq0eC9xr VarKorz25elSSfFj73qUjYePvecRFUhdsdbdcIcjFNkby7Kc6QK0ZPxvXZyf6gtjxe ob/f7E6TV+hw536dhN5WAc8tEU+BV/AOu0mf26wOXSEGHRa+N23KIh1wFha6iYgWxQ scs4aVkAs+GB8TsO9IaAx4sEdw8CiA43jc+qvehsIXhWdBbdqEWD6OS9U58ojgQAul W6e8YActPrU7A== From: Alexey Gladkov To: linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kbuild@vger.kernel.org Cc: Masahiro Yamada , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Oleg Nesterov , Alan Maguire Subject: [PATCH v4] bpf: Remove custom build rule Date: Fri, 30 Aug 2024 09:43:50 +0200 Message-ID: <20240830074350.211308-1-legion@kernel.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 According to the documentation, when building a kernel with the C=2 parameter, all source files should be checked. But this does not happen for the kernel/bpf/ directory. $ touch kernel/bpf/core.o $ make C=2 CHECK=true kernel/bpf/core.o Outputs: CHECK scripts/mod/empty.c CALL scripts/checksyscalls.sh DESCEND objtool INSTALL libsubcmd_headers CC kernel/bpf/core.o As can be seen the compilation is done, but CHECK is not executed. This happens because kernel/bpf/Makefile has defined its own rule for compilation and forgotten the macro that does the check. There is no need to duplicate the build code, and this rule can be removed to use generic rules. Acked-by: Masahiro Yamada Tested-by: Oleg Nesterov Tested-by: Alan Maguire Signed-off-by: Alexey Gladkov --- kernel/bpf/Makefile | 6 ------ kernel/bpf/btf_iter.c | 2 ++ kernel/bpf/btf_relocate.c | 2 ++ kernel/bpf/relo_core.c | 2 ++ 4 files changed, 6 insertions(+), 6 deletions(-) create mode 100644 kernel/bpf/btf_iter.c create mode 100644 kernel/bpf/btf_relocate.c create mode 100644 kernel/bpf/relo_core.c diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile index 0291eef9ce92..9b9c151b5c82 100644 --- a/kernel/bpf/Makefile +++ b/kernel/bpf/Makefile @@ -52,9 +52,3 @@ obj-$(CONFIG_BPF_PRELOAD) += preload/ obj-$(CONFIG_BPF_SYSCALL) += relo_core.o obj-$(CONFIG_BPF_SYSCALL) += btf_iter.o obj-$(CONFIG_BPF_SYSCALL) += btf_relocate.o - -# Some source files are common to libbpf. -vpath %.c $(srctree)/kernel/bpf:$(srctree)/tools/lib/bpf - -$(obj)/%.o: %.c FORCE - $(call if_changed_rule,cc_o_c) diff --git a/kernel/bpf/btf_iter.c b/kernel/bpf/btf_iter.c new file mode 100644 index 000000000000..0e2c66a52df9 --- /dev/null +++ b/kernel/bpf/btf_iter.c @@ -0,0 +1,2 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "../../tools/lib/bpf/btf_iter.c" diff --git a/kernel/bpf/btf_relocate.c b/kernel/bpf/btf_relocate.c new file mode 100644 index 000000000000..c12ccbf66507 --- /dev/null +++ b/kernel/bpf/btf_relocate.c @@ -0,0 +1,2 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "../../tools/lib/bpf/btf_relocate.c" diff --git a/kernel/bpf/relo_core.c b/kernel/bpf/relo_core.c new file mode 100644 index 000000000000..aa822c9fcfde --- /dev/null +++ b/kernel/bpf/relo_core.c @@ -0,0 +1,2 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "../../tools/lib/bpf/relo_core.c"