From mboxrd@z Thu Jan 1 00:00:00 1970 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 845C2270566; Tue, 29 Apr 2025 04:06:17 +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=1745899577; cv=none; b=PNhMf0wP+4X7TvesCoy/RB74NCQ+6GGgOLioXCooKIhdNIai/PxvAv7PRUFW0Tok6n/kG6w0B9Fpp5C/sEb9WbqnHYzsEtnZl/VXtBx1uq1I5d9ghTKG5Yojvidd2vDjmPTSNHQk5T0LwL5mbuN44iSEwfm3aTdqFraGNAvgIe8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745899577; c=relaxed/simple; bh=/prxRR17A4AUb6KENZNu6wyfYJfvM5OCsGMmrdX+6/8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Hna0yWEEbf/us2NLbbkX0ZoJOw0KN0jqCHELjH/Ct9JMYuyGitVf+su9sMSneC3LMuWxHKPTp07OKu3NDE1wHnyu2tvJXaPN7GkrR4/b+Zz2jCTYjJd9/uRc2sw0m2LAeA/dOTkcIAWfMJose6LtfC2aUzv78p4JWO5NdylnpJk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lG9VsAzy; 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="lG9VsAzy" Received: by smtp.kernel.org (Postfix) with ESMTPS id EE095C4CEF8; Tue, 29 Apr 2025 04:06:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745899577; bh=/prxRR17A4AUb6KENZNu6wyfYJfvM5OCsGMmrdX+6/8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=lG9VsAzybNMbTnUEEHKSZoytPudEOxylRsU+yA6SDAHUs3Vk7juqULDjS6C9O5LhB floTcFwObWWgd9Qy9P+MsJCS+3gFOAKzAAOH7m0u/4KWl+qdSjhZU9WQHFKvNXdN8W BSe3ulfFjmdzCAMY/eCXZehkexHdlwS5pZrZjTrqFgqJT72FDN8uZXwL8SBxJ7riwk AI428EO6T1lPUaWRb0VGqUy9vaGQ4WcwBN3SKW2NraiH6KEL9CXGwiRwCQCvt5x0qw YvgmY7X/yDpGTRvRh8Zxgu/GQZGWWwyBUifBfdMWpSe5cOyf5FDSzF4WkOsKwik//K Pr92s9YBYEgyA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E278EC369CB; Tue, 29 Apr 2025 04:06:16 +0000 (UTC) From: Chen Linxuan via B4 Relay Date: Tue, 29 Apr 2025 12:06:07 +0800 Subject: [PATCH RFC v3 3/8] vfio/virtio: add __always_inline for virtiovf_get_device_config_size Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250429-noautoinline-v3-3-4c49f28ea5b5@uniontech.com> References: <20250429-noautoinline-v3-0-4c49f28ea5b5@uniontech.com> In-Reply-To: <20250429-noautoinline-v3-0-4c49f28ea5b5@uniontech.com> To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Andrew Morton , Yishai Hadas , Jason Gunthorpe , Shameer Kolothum , Kevin Tian , Alex Williamson , Peter Huewe , Jarkko Sakkinen , Masahiro Yamada , Nathan Chancellor , Nicolas Schier , Nick Desaulniers , Bill Wendling , Justin Stitt , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Mathieu Desnoyers , Peter Zijlstra , "Paul E. 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Peter Anvin" Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, virtualization@lists.linux.dev, linux-integrity@vger.kernel.org, linux-kbuild@vger.kernel.org, llvm@lists.linux.dev, Winston Wen , kasan-dev@googlegroups.com, xen-devel@lists.xenproject.org, Chen Linxuan , Changbin Du X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3264; i=chenlinxuan@uniontech.com; h=from:subject:message-id; bh=xG7js8JRxRjbFUIGcKi60xVgk95Kd+hLnEeuvHk0cSk=; b=owEBbQKS/ZANAwAKAXYe5hQ5ma6LAcsmYgBoEFAwmuPV3ACiHfIboeRqguBq0EhDlCeY2gJxc awVBFVX6dWJAjMEAAEKAB0WIQTO1VElAk6xdvy0ZVp2HuYUOZmuiwUCaBBQMAAKCRB2HuYUOZmu i/7eD/9hIYexsn7L7GF/snRnakoE8V20CWkBNi/mt9lRdndsCiW2OdR1Ihha5YAXqecwmxRnfIk Emq8Rre/zUQpqoY7eJyR2xDIWhTnkwkCyfEyTsfGHJLEwQpKTt6VJJ194lzRgNJrsRGkdhoJgPI YVf5pd6n5+4vBUJ/2hfI/Wqt3KqqPR6vu9hUhNnSvGaEfJr67namCj1dKTEwipm+iyXGN7sYjwk snpKKFC8f1CyrsuOK1huwKroAFyXxK4bO9wRbSoE6Gt/WzfA3AIzffrZ/aMgOYpKOZs6Ing6PD3 JJtFMLXppoFpuxaeXTedKMV2BuZ+QBRT8o4qDbJfIlRShfkM7nmkNgwKfyWdeXJVC/xO2NpbaXw oP4yE1mGjdBOkSpdcza79ucV0LSYANd8QnYJp5U0wRF5sJzj2Nll37E/9/W1L6yc4KSM3WdsvwP RsV1dnU8iFNZu61T95iCwa1GRo9dBbiQkjhkOvrBKEnM4ASeS1O0D2PdUlpWE7vO5rmS4F+3XCa Y/P1rp+j9DMaFuEPisA/6hp+L1E2HvBW5Md/Z6qu10+dwT1kPXvMWF0HUIgHhAppENa897twV7b 6F9KYT4mFmdKNtZU6HSx6NzlGP2GxiJ1qZQP6mSPk+y5h2cOxYVABAdoN0CT/1P2jyc5Gq7LZo4 ETnYNoxJgZ1iw4Q== X-Developer-Key: i=chenlinxuan@uniontech.com; a=openpgp; fpr=D818ACDD385CAE92D4BAC01A6269794D24791D21 X-Endpoint-Received: by B4 Relay for chenlinxuan@uniontech.com/default with auth_id=380 X-Original-From: Chen Linxuan Reply-To: chenlinxuan@uniontech.com From: Winston Wen Presume that kernel is compiled for x86_64 with gcc version 13.3.0: make defconfig ./scripts/kconfig/merge_config.sh .config <( echo CONFIG_VFIO=m echo CONFIG_VIRTIO_PCI=y echo CONFIG_VIRTIO_PCI_LIB_LEGACY=y echo CONFIG_VIRTIO_VFIO_PCI=m echo CONFIG_VIRTIO_VFIO_PCI_ADMIN_LEGACY=y ) make KCFLAGS="-fno-inline-small-functions -fno-inline-functions-called-once" \ drivers/vfio/pci/virtio/legacy_io.o This results a compile error: CALL scripts/checksyscalls.sh DESCEND objtool INSTALL libsubcmd_headers CC drivers/vfio/pci/virtio/legacy_io.o In file included from : drivers/vfio/pci/virtio/legacy_io.c: In function 'virtiovf_init_legacy_io': ././include/linux/compiler_types.h:557:45: error: call to '__compiletime_assert_889' declared with attribute error: BUILD_BUG_ON failed: !is_power_of_2(virtvdev->bar0_virtual_buf_size) 557 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ ././include/linux/compiler_types.h:538:25: note: in definition of macro '__compiletime_assert' 538 | prefix ## suffix(); \ | ^~~~~~ ././include/linux/compiler_types.h:557:9: note: in expansion of macro '_compiletime_assert' 557 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG' 50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) | ^~~~~~~~~~~~~~~~ drivers/vfio/pci/virtio/legacy_io.c:401:9: note: in expansion of macro 'BUILD_BUG_ON' 401 | BUILD_BUG_ON(!is_power_of_2(virtvdev->bar0_virtual_buf_size)); | ^~~~~~~~~~~~ BUILD_BUG_ON needs virtvdev->bar0_virtual_buf_size to be computed at compile time. So we should mark virtiovf_get_device_config_size() with __always_inline here. Co-developed-by: Chen Linxuan Signed-off-by: Chen Linxuan Signed-off-by: Winston Wen --- drivers/vfio/pci/virtio/legacy_io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vfio/pci/virtio/legacy_io.c b/drivers/vfio/pci/virtio/legacy_io.c index 832af5ba267c49a079009cfe0fa93c15ba7a490f..b6871d50b9f9e278ef3c49a9cb2baf474b8271c6 100644 --- a/drivers/vfio/pci/virtio/legacy_io.c +++ b/drivers/vfio/pci/virtio/legacy_io.c @@ -350,7 +350,7 @@ int virtiovf_open_legacy_io(struct virtiovf_pci_core_device *virtvdev) return virtiovf_set_notify_addr(virtvdev); } -static int virtiovf_get_device_config_size(unsigned short device) +static __always_inline int virtiovf_get_device_config_size(unsigned short device) { /* Network card */ return offsetofend(struct virtio_net_config, status); -- 2.43.0