From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f73.google.com (mail-wr1-f73.google.com [209.85.221.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01161373BE7 for ; Mon, 11 May 2026 11:38:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778499484; cv=none; b=B1hO5zaz58VLJTWIDd0WPDJsp65tCjVEm8OolGmUfk2fidZo9EyQCiswXmi9RuB8K3JCivfRg5LZkT+K+fWnWdQumWoagCmqGlFjapA/NdjXqlrSBpMX9C5ED4+JzJsguVyUjaFQ3ou5PIah5z1jfoRCgV5gMg+Iu0W4C879YVA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778499484; c=relaxed/simple; bh=eaY6TK+Qpe+lIaRuB6hMveOfH0bKxY7FKAgnCBah25M=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=VaRcx5NzFqxmJ17/K6d9QY+VKauXps9MsicviLm/mvOBejECN1SiYWZwf+boijW4hOYC/XAf9mRMbMPtQwgpCFRKJG37qJnWY7DTveyaN+0qlXN303l11SEX/zOhGyX1E76IM0MqSkIzGgv/1qpnwDD72UXYKjqwZgU9hTIac1E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--tabba.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=dYrKEV2v; arc=none smtp.client-ip=209.85.221.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--tabba.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dYrKEV2v" Received: by mail-wr1-f73.google.com with SMTP id ffacd0b85a97d-447f2ce5556so2650626f8f.2 for ; Mon, 11 May 2026 04:38:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1778499481; x=1779104281; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=kzm1887tbi5TpLOTPTV8msNtv3UBrK/MPRsLv3+5U+k=; b=dYrKEV2v14rwfKI8jnlPESyjvvZnNDJuuwiuTtWx6Qi2At/wOwN5BKKiOs68Md6+uk owjbQWjws9pu7TAB3TKlbGZ78WtJ0D5/IfQTx0CGDflYQckwBEBvLRnWVduqcG73SsBD npe0ROPc1RTK5ZmwgTu/fYiUBKzccjDgsDN+yrMzAdzGmr8vNuRbkFPQDaMVJYPJo1TI br8NP8BCqt+SFWa7MxvcetbeRxLuwUVMLG7Zepmy8CFQv3aUH0THWxCRO1Y+YQHPgzA6 e2Ga/T6OB4dgdXHtq+l0VNbLvv5tYCzatl9GbZnwi2jXRMhZXLPPEkIMSFwV+QOCB/1r XxQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778499481; x=1779104281; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=kzm1887tbi5TpLOTPTV8msNtv3UBrK/MPRsLv3+5U+k=; b=EjLwyUh9sTvZ9euTwae1llw7bfF6tdia1ET5ky7ArvpifljyaeMWETQS9u+DQiQujk xGaZddxGpoWU+2MUASd9LG4ds/1K0Qe6ln5YMJwMNlMSnMXGNFRQmjEwvuvX98r67Hla 9Pe3gb3KND1/QoSKrDJt6kuugnhUdJhK+vkegO7U6/gw3bq0WIq8CKA19MEzlRz9oKEd l95/gS+ZITxpVUJbMmdD0If5asyQzwCcYepHRB/TFFY4zWz0OZ9DY58vV6SxB8aFi2A2 SLIDjaYg6PDVYq67bqs8XcO/e7au9di2DYHEQp8CZiuwuoK5UmZqQOonBxw+egyyXPA3 kM8g== X-Forwarded-Encrypted: i=1; AFNElJ9ybOM5h9AvsuWd/NxI2IhMFgs0O20PZ3cyQlqYFEia+NFBff8pUh74xwCo7KoqzHIxTXRsWLP7+1cKEEQ=@vger.kernel.org X-Gm-Message-State: AOJu0YyW7lcoacTVaG8LQa+wH/HswcC5uhTH7YpwmG/a0Pri8oElqq0s aj+/Z6SATFrNiMymePL2fVRkZ80NOCo6fpCo4N7E6MM2nH8Ms+RFRbv4c/1SgvHr09hpO10I1fo 0Sg== X-Received: from wmfq17.prod.google.com ([2002:a05:600c:2e51:b0:48a:5970:2007]) (user=tabba job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:3055:b0:488:ac01:72de with SMTP id 5b1f17b1804b1-48e51e0bc2fmr222188565e9.5.1778499481339; Mon, 11 May 2026 04:38:01 -0700 (PDT) Date: Mon, 11 May 2026 12:37:58 +0100 In-Reply-To: <20260511113759.610924-1-tabba@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260511113759.610924-1-tabba@google.com> X-Mailer: git-send-email 2.54.0.563.g4f69b47b94-goog Message-ID: <20260511113759.610924-2-tabba@google.com> Subject: [PATCH 1/2] KVM: selftests: Fix MADV_COLLAPSE build failure on older toolchains From: Fuad Tabba To: Paolo Bonzini , Sean Christopherson , Shuah Khan Cc: Marc Zyngier , Oliver Upton , Will Deacon , Ackerley Tng , David Matlack , kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" guest_memfd_test.c uses MADV_COLLAPSE unconditionally, but the constant was only exposed in glibc 2.37. Distros still on older glibc (e.g. Debian Bookworm, glibc 2.36) cannot build the test. Add a compile-time fallback that defines MADV_COLLAPSE to its kernel-ABI value when the libc header does not, matching the established selftest pattern for sometimes-missing libc constants (see selftests/bpf/uprobe_multi.c, selftests/mm/hugetlb-soft-offline.c). Fixes: 9830209b4ae8 ("KVM: selftests: Test MADV_COLLAPSE on guest_memfd") Signed-off-by: Fuad Tabba --- tools/testing/selftests/kvm/guest_memfd_test.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c index d6528c6f5e03..45990ae5f1e5 100644 --- a/tools/testing/selftests/kvm/guest_memfd_test.c +++ b/tools/testing/selftests/kvm/guest_memfd_test.c @@ -23,6 +23,10 @@ #include "test_util.h" #include "ucall_common.h" +#ifndef MADV_COLLAPSE +#define MADV_COLLAPSE 25 +#endif + static size_t page_size; static void test_file_read_write(int fd, size_t total_size) -- 2.54.0.563.g4f69b47b94-goog