From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E2D7C43219 for ; Thu, 2 May 2019 20:20:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DBB732080C for ; Thu, 2 May 2019 20:20:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RQFE7+4k" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726327AbfEBUUE (ORCPT ); Thu, 2 May 2019 16:20:04 -0400 Received: from mail-it1-f196.google.com ([209.85.166.196]:35129 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725962AbfEBUUE (ORCPT ); Thu, 2 May 2019 16:20:04 -0400 Received: by mail-it1-f196.google.com with SMTP id l140so5715742itb.0; Thu, 02 May 2019 13:20:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=8rF3Gnx4uVH4vT8m+J/MHBp1IFdWlP4V/lANQLuXU0M=; b=RQFE7+4k4M8+wYI1I36VEomE+70DTGRCY2e78zXFq+B81n8sxAx18GFz4GgO3NFQ+f i5iUxn5WZnAVv3I8mWshGlNK4Splcr+bnc3szwrTNDtJPBH/b516CnUzhWQHvx/Mf8cv O5vwO52jV1tooZc1iA3sstlBaC0ewt4gencAIKc6YQCCDuKGq2WCj8/BRCWk6+2uK8LN ANSRHfV6GkaVz9KgknChBTqdcClODdr0xlboTb577IwkYThRF66gwS7joZ1F2LQv/AQP nmk5OQroaFZPYylRTUjRZmqf/p4XXbEp0phxn47UeGk9Da1TMNLRMxReL1JbqyNLJSXf FF2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=8rF3Gnx4uVH4vT8m+J/MHBp1IFdWlP4V/lANQLuXU0M=; b=lVRphhDY9Y/3HaHE/CHavsLWtRtEgl+zfhqPX5VPXL7OssD5wgdTFDZi1ZiSL8LRwZ yn/BOkCG1Hb4DUe9sAQO1Ky42jqLTrA8lH134YLJh4ynu56AAc94zTq3VSsRaGb8vRkH Sxys9W4kZNwPcdAvio5Z/Ng3RpAykjZjIpV8eNpzOIREYYldR0U2FqTDdQiFA1uYXMAr m32s3c0lJp+XEntjK64APRcI0FvKNRl1aVPnOT2pru827Y6m4fOtPfK0RxwlT+YI7CTy LT/xRyIaBTiiBSfPHuyOwHtziqoOfORQfEYqvn7JIaW/vvSr+Uwx7hoqVFHRTNeNGii0 2x1A== X-Gm-Message-State: APjAAAX0WfxUU4dxay1a4gqsHaFR2n+n+3DHJ199x2mrr+rsMXRpjs8V Bj/9uO4mPqxzTc9VlnDjoBjUA5p7FkHlQaPpryo= X-Google-Smtp-Source: APXvYqz7roQk4gRK1HEoWI9GAtvZPk3QvMFuzChbPtXXdtzeJkmNSXo3h52CK/tTfBBECFjLP9QPI5qO8G04gXgWM0A= X-Received: by 2002:a05:6638:214:: with SMTP id e20mr4243086jaq.59.1556828403141; Thu, 02 May 2019 13:20:03 -0700 (PDT) MIME-Version: 1.0 References: <1556812610-27957-1-git-send-email-vgupta@synopsys.com> In-Reply-To: <1556812610-27957-1-git-send-email-vgupta@synopsys.com> From: Y Song Date: Thu, 2 May 2019 13:19:27 -0700 Message-ID: Subject: Re: [PATCH v2] tools/bpf: fix perf build error with uClibc (seen on ARC) To: Vineet Gupta Cc: Alexei Starovoitov , Daniel Borkmann , netdev , Wang Nan , Song Liu , Yonghong Song , Martin KaFai Lau , bpf , LKML , linux-snps-arc@lists.infradead.org, linux-perf-users@vger.kernel.org, arnaldo.melo@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Thu, May 2, 2019 at 8:57 AM Vineet Gupta wrote: > > When build perf for ARC recently, there was a build failure due to lack > of __NR_bpf. > > | Auto-detecting system features: > | > | ... get_cpuid: [ OFF ] > | ... bpf: [ on ] > | > | # error __NR_bpf not defined. libbpf does not support your arch. > ^~~~~ > | bpf.c: In function 'sys_bpf': > | bpf.c:66:17: error: '__NR_bpf' undeclared (first use in this function) > | return syscall(__NR_bpf, cmd, attr, size); > | ^~~~~~~~ > | sys_bpf > > Signed-off-by: Vineet Gupta Acked-by: Yonghong Song > --- > v1 -> v2 > - Only add syscall nr for ARC, as asm-generic won't work with arm/sh [Y Song] > --- > tools/lib/bpf/bpf.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c > index 9cd015574e83..d82edadf7589 100644 > --- a/tools/lib/bpf/bpf.c > +++ b/tools/lib/bpf/bpf.c > @@ -46,6 +46,8 @@ > # define __NR_bpf 349 > # elif defined(__s390__) > # define __NR_bpf 351 > +# elif defined(__arc__) > +# define __NR_bpf 280 > # else > # error __NR_bpf not defined. libbpf does not support your arch. > # endif > -- > 2.7.4 >