From nobody Sun Feb 8 06:03:17 2026 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 5035C270542; 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=AuqHuQ+hIWdz1W+EB02CECFkKXfgAW7Tru97Pb4DYgGh288bLevYkc7d5Y1jrOgEXKT9xchNUut91x2W3JrOd5WTHroTMMLOWdUMF/o5motsaDjCS+oSAEvxgKqCKQ4vqy8Bzf9zflnunyhoK7Gcgi/YAszUjJnZlsp3IdUcKUk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745899577; c=relaxed/simple; bh=94UzipiV219n1Nsds3GgUffrYhVWmSEuqNwCotvgHTg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=okXwicw6ow8u2UYaSZrYe2r6zQjlfc2gqpKa7Tf86rp0b5mj88GP7vChJaLcmSMO5Y5ceySaRStFAtbzHsGj5r1XkoF1ftMB9QIZK0Llea2q0K9IyaVrpbXLqYw/2IRWuevD73VHziHSEOmpEp/hWfvybJMWfTULDKjK4TnFgiY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=umnHgPjx; 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="umnHgPjx" Received: by smtp.kernel.org (Postfix) with ESMTPS id BF675C4CEEE; 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=1745899576; bh=94UzipiV219n1Nsds3GgUffrYhVWmSEuqNwCotvgHTg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=umnHgPjx/uswvCkSmQAtfNXwh0J1RgCPXPtU15EJ3BJrGMr9TeAkv+02Hx8/aJrZP B9pids9hDCCRiksaveqMrCaUIPjjT40xeYtCj3KLeve1mYRGk57NEeo0YsYHn7kloJ Wb5lXlJ1ICFfjMDI7QXO7ihYek6tuetYOzZNrzvuaGAxSxtzS6wFaDjCD1KHmLlOpd mGs+bcfHf0EcMQwc5GWPCv3Q+hydECGq09BD3DqCK5uZZKY6iXbfQpCANImiozP2H4 ry6PlbZas22d5KF1Q/sW5U8JGsO3qzDZZJpJ9Sos51pOgukjAw6CGW4cOv/pPGGvJh 2wpUI2Qi0eYHg== 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 AC846C369D1; Tue, 29 Apr 2025 04:06:16 +0000 (UTC) From: Chen Linxuan via B4 Relay Date: Tue, 29 Apr 2025 12:06:05 +0800 Subject: [PATCH RFC v3 1/8] nvme: add __always_inline for nvme_pci_npages_prp Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250429-noautoinline-v3-1-4c49f28ea5b5@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. McKenney" , Boqun Feng , Dmitry Vyukov , Andrey Konovalov , Juergen Gross , Boris Ostrovsky , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. 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=2975; i=chenlinxuan@uniontech.com; h=from:subject:message-id; bh=Z0QiTYLHzEeebaywUqCSW16Ny4EMqCsjjX+KS5KBMNU=; b=owEBbQKS/ZANAwAKAXYe5hQ5ma6LAcsmYgBoEFAukhIgTV0U3xfinuIjd2L0FB1AExqdCchlv A3ri9QFLWiJAjMEAAEKAB0WIQTO1VElAk6xdvy0ZVp2HuYUOZmuiwUCaBBQLgAKCRB2HuYUOZmu i9PbD/0bxMLZB/tZ4Ta8gMq1WIv38DYhUP3aWnHRrfHrBmcZmF3pYKgj7U3bQhz1rGgW21/5jLf O6iQHC8JkszMXt7z43locXuD3D2XLaMzfIjJ4SYSBJJCUhLDwTO0hXO+SgM8VdRdhmjZUc1WhnK MotrwNb7+YScOJV7UKO27QZ4mEX9QtP1og5KDtG4fX2A4elJ/oUz5VyPu1ZVWaZIPGpR6UfQu2W 3V96onZcmtcYOTu7m+Q4YYn57iocabwdiYGXp9u6+muG1V36fqjgCWLFdJ87b10fBGpqSdLd78K Np/ZrE3r79VyFTS10nLQwcH5emDVtRsUooPidOTFB5RbtCiWZVwNXbzPXeUAOlpo1fud6r4VWu6 qQumY8DgxrRS5yYkJuqNuYsyMje5EqNF0cT9ACHUWaiTx2mc4D4GMZxmlK0Gb/i6H6b5Nn2r2Xj wAaoImxclHPRalFdhXU+KjoIiAQ+6sz9E+8WePUUrBdVGKfCKQPnIoZrmz83bxpZtjB8fQ0tEQM iAAaovwAWgBfxfbUHIa8VeSzTs5I5aHhO+aY/5Sd1k2ttkBswHZJumET7aNiQoPsJoewmJYilGQ jL21aH2TLLnbAvvZ8tf8QpXJtxzRSYrmcdb8wsQqvI0rVPoHUhioggOtX3jm+SKC+ApmPIpQr8u b//ZkECSNX3jkKQ== 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 On x86_64 with gcc version 13.3.0, I build drivers/nvme/host/pci.c with: make defconfig ./scripts/kconfig/merge_config.sh .config <( echo CONFIG_BLK_DEV_NVME=3Dm ) make KCFLAGS=3D"-fno-inline-small-functions -fno-inline-functions-called-= once" \ drivers/nvme/host/pci.o Then I get a compile error: CALL scripts/checksyscalls.sh DESCEND objtool INSTALL libsubcmd_headers CC drivers/nvme/host/pci.o In file included from : drivers/nvme/host/pci.c: In function 'nvme_init': ././include/linux/compiler_types.h:557:45: error: call to '__compiletime_= assert_878' declared with attribute error: BUILD_BUG_ON failed: nvme_pci_np= ages_prp() > NVME_MAX_NR_ALLOCATIONS 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 '_c= ompiletime_assert' 557 | _compiletime_assert(condition, msg, __compiletime_assert_= , __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compileti= me_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), m= sg) | ^~~~~~~~~~~~~~~~~~ ./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: " #cond= ition) | ^~~~~~~~~~~~~~~~ drivers/nvme/host/pci.c:3804:9: note: in expansion of macro 'BUILD_BUG_ON' 3804 | BUILD_BUG_ON(nvme_pci_npages_prp() > NVME_MAX_NR_ALLOCATI= ONS); | ^~~~~~~~~~~~ Mark nvme_pci_npages_prp() with __always_inline make it can be computed at compile time. Co-developed-by: Chen Linxuan Signed-off-by: Chen Linxuan Signed-off-by: Winston Wen --- drivers/nvme/host/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index b178d52eac1b7f7286e217226b9b3686d07b7b6c..9ab070a9f0372bc6595c29a884e= e9f2ffe5ae8e9 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -390,7 +390,7 @@ static bool nvme_dbbuf_update_and_check_event(u16 value= , __le32 *dbbuf_db, * as it only leads to a small amount of wasted memory for the lifetime of * the I/O. */ -static int nvme_pci_npages_prp(void) +static __always_inline int nvme_pci_npages_prp(void) { unsigned max_bytes =3D (NVME_MAX_KB_SZ * 1024) + NVME_CTRL_PAGE_SIZE; unsigned nprps =3D DIV_ROUND_UP(max_bytes, NVME_CTRL_PAGE_SIZE); --=20 2.43.0