From patchwork Thu Jan 24 16:54:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Fomichev X-Patchwork-Id: 1030570 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="ogHgD/cx"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43lpCv30Svz9sBn for ; Fri, 25 Jan 2019 03:54:35 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728943AbfAXQyd (ORCPT ); Thu, 24 Jan 2019 11:54:33 -0500 Received: from mail-pf1-f201.google.com ([209.85.210.201]:43213 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727658AbfAXQyc (ORCPT ); Thu, 24 Jan 2019 11:54:32 -0500 Received: by mail-pf1-f201.google.com with SMTP id b8so5062629pfe.10 for ; Thu, 24 Jan 2019 08:54:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=6Lcta1FUM4BERfWtuPISA8n1Kja36+ATdKo2gy2byZU=; b=ogHgD/cxkEqiye3YN0M/Er2n6gKES4WhktofJzrASWO6MdpzjxinM/t0rGmwYHDfxc YYrJrqWAsSd6bvfTFPtjOcIJWW55Y8vOc7hQ5lXTQ76u2aGvhrMNZCbuGfqqd6I4jHkO LExCPWaohltLfReDt7/B4pQyl67rGc8uHG5n883zbQ/7YuTlfErCPaCKSrwHKcemE85Q +LIMOiuSJd1CDV1LwAXwxHF7CyM4ZevwGfpEPo6QSRH7aZTgIoELCdjTmmaE7ZGbcWNJ PsG+Xf6UVpAMr/kodwYpZl1Jj38t5M4A5u1UuQ2hV4vbw5XocbJyNSeBnx0b95idUWG6 noNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=6Lcta1FUM4BERfWtuPISA8n1Kja36+ATdKo2gy2byZU=; b=BFI/ZK2wfXyBbyW4+T9hjxW6V3f95j5lspQmlvRqXdqUCG5n7mT5gh3tAM3HT1aM8L OlxGtQHhX1B5WQO45qO/Fer3xPPBhT8RJ1GI6gu6kEa1g1HZRJkN4G9Zb+emNwdF8jDj 7wRZtcxvUh0IVqnLbzLqQ1VjYtYKWaYktTHYYJvYCDuIcrxmc/yDo1CTPXDUnROpFDvs P0h+59aAT8AmmTNN/ZG6iIfTq8zF3/oMqQVqljlhydGM58bq3ImdapXQauROOt5fjTtq 4DtYHZsDObdYRmhNq/erFBJ7THHWMiLexZRJoLJGgY6cZQuW2JUUQTX0tcEcS1Z5wiTN jHzA== X-Gm-Message-State: AJcUukfv1qp3TeBd46s7BYVY2y4twEN+HP4wLBNvWO6vTrTacZbPBePS jWdynqVunBUgze5Eyvot1JrBYLI6kgxZcGbI6SUZUe6t1YnIqMtpKXfRHpkKrMqLnEdFx+paHa6 KFN00wHEZGY3UV/tqpNXRSPpmV4coSSEos4Y1/cAFlYf4nHKM/fe0EA== X-Google-Smtp-Source: ALg8bN5Q9DF/6gxRpJ7hPhNpm4+Dy90FX87bNy6dMJf+MMoV/2zExsen4TJvddqYWz3ONpPqz9r5ypc= X-Received: by 2002:a62:6802:: with SMTP id d2mr3021090pfc.118.1548348871790; Thu, 24 Jan 2019 08:54:31 -0800 (PST) Date: Thu, 24 Jan 2019 08:54:29 -0800 Message-Id: <20190124165429.36378-1-sdf@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.20.1.321.g9e740568ce-goog Subject: [PATCH bpf-next v2] selftests/bpf: suppress readelf stderr when probing for BTF support From: Stanislav Fomichev To: netdev@vger.kernel.org Cc: davem@davemloft.net, ast@kernel.org, daniel@iogearbox.net, Stanislav Fomichev Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Before: $ make -s -C tools/testing/selftests/bpf readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF sections of machine number 247 readelf: Warning: unable to apply unsupported reloc type 10 to section .debug_info readelf: Warning: unable to apply unsupported reloc type 1 to section .debug_info readelf: Warning: unable to apply unsupported reloc type 10 to section .debug_info After: $ make -s -C tools/testing/selftests/bpf v2: * use llvm-readelf instead of redirecting binutils' readelf stderr to /dev/null Signed-off-by: Stanislav Fomichev Acked-by: Song Liu --- tools/testing/selftests/bpf/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 70229de510f5..1cca5f2567c2 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -95,6 +95,7 @@ $(BPFOBJ): force CLANG ?= clang LLC ?= llc LLVM_OBJCOPY ?= llvm-objcopy +LLVM_READELF ?= llvm-readelf BTF_PAHOLE ?= pahole PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1) @@ -131,7 +132,7 @@ BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ - readelf -S ./llvm_btf_verify.o | grep BTF; \ + $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ /bin/rm -f ./llvm_btf_verify.o) ifneq ($(BTF_LLVM_PROBE),)