From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 DF1733D3D05; Tue, 8 Sep 2026 20:59:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788901171; cv=none; b=M/j49EEdG8viO/5aAa9S4CwU0wfXvxN0TpYzJ+0uRA7g+WJhGezn6zKT17EVInva+QBX4FHfj+l7KhkbzewGrhGPeN0srmURPyidKzPX2f7gpdYlk0QvxqtlDMsG0pfPIyYNW8KNZcVqePe3ISEvxb30IH0CmOyHUB62220c/OI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788901171; c=relaxed/simple; bh=kx145CbsbOZNlrJo3YNnQ6X8zzclemP0tqvdTYAGrNw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=IlOB2Yh5P2A7mTgi46aiydOfYNgyLzB9R6P5xs0kA0jTL/nAxeE7zjaiKu4UX4EjUJs0klh/M2MN5Xz+cPIB6HpkbGLOk9TBvD7HpU3C16bIrVSif2xKYFovppEHfX2Up+FA4PjaajzUkZ5aNVT0XnqanUhX+Zrl3S0tnCzLgOo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OIpDOBSg; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OIpDOBSg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 046F01F00A3A; Tue, 8 Sep 2026 20:59:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788901168; bh=RpyglNkLvgtO+g1zDJNpkY3JopuChXGi3ttcKAuST+8=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=OIpDOBSgJrH76v4qVZGsW50WfuCBkHgvg4YvO+ZN3uJi1EdpWYnqx9/rxijC1G8Y2 VmSITaucbZMwSNTrXt+SWMY3umH2RYhUY9lg8jXa+zDPf6/z26mQyBH6CgVrjNi3NQ B2IlUKR/DopfAfvqCauFgd0ycxSvLywvK9BKj3UvpoAkW+0BzLMFCXb/P5rNbzhqK/ JomapY4q5gpgznQ6qVwqt0ZH9qq4WWdA8YAfsA0whir9iAxDmqsIfvPFDUxhSBP6v+ MDdFlVH88zzAe38RNflu9HCao15bxZR9oE8mh13QjCKeM/zrvUOJfBkBoNAveTh4ui c227LJShut05w== From: "Lorenzo Stoakes (ARM)" Date: Tue, 08 Sep 2026 21:55:21 +0100 Subject: [PATCH 21/23] rust: make exports.o depend on the headers generated for it Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260908-build-speedup-v1-21-5dc1ac01672d@kernel.org> References: <20260908-build-speedup-v1-0-5dc1ac01672d@kernel.org> In-Reply-To: <20260908-build-speedup-v1-0-5dc1ac01672d@kernel.org> To: Linus Torvalds , Nathan Chancellor , Nicolas Schier , Nick Desaulniers , Bill Wendling , Justin Stitt , Masahiro Yamada , Alexey Gladkov , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Arnd Bergmann , Catalin Marinas , Will Deacon , Mark Rutland , Ard Biesheuvel , Ilias Apalodimas , Josh Poimboeuf , Peter Zijlstra , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , Jonathan Corbet , Randy Dunlap Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, Jens Axboe , "Lorenzo Stoakes (ARM)" X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1286; i=ljs@kernel.org; h=from:subject:message-id; bh=kx145CbsbOZNlrJo3YNnQ6X8zzclemP0tqvdTYAGrNw=; b=owGbwMvMwCV2fu7ZrsZH9SKMp9WSGLIWlFmyftt0/rHJ4/XeJ5NNZMp8m66+kNfu9lsnecLy8 QEXFo2SjlIWBjEuBlkxRZbnX8T3B4mEzeu84O8GM4eVCWQIAxenAEwkPJGRoT+U9y0318zvJ0XM dT6t5PNlvlHHN0H8/Wup7seP/9x/r8bI8Hra9b3v2RsWHzq2frJy1QIuIS+b/yHHakRzt3woe77 sJicA X-Developer-Key: i=ljs@kernel.org; a=openpgp; fpr=E7F417BF5214569E89D04F46CF9DCD8A81E27F14 rust/exports.c includes the exports_*_generated.h listing the symbols of the core, bindings, kernel and helpers objects, but this is not expressed in its Makefile. This worked previously because the headers are always-y targets, and make prepare built all of the rust crates first, which is an implicit dependency. Fix this as it is a dependency of the subsequent commit. Assisted-by: LLM Signed-off-by: Lorenzo Stoakes (ARM) --- rust/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/rust/Makefile b/rust/Makefile index da1a7409d984..74d21ae6f383 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -728,6 +728,11 @@ endef $(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE +$(call if_changed_rule,rust_cc_library) +# The exported symbol lists are generated from the crates' objects. +$(obj)/exports.o: $(obj)/exports_core_generated.h \ + $(obj)/exports_bindings_generated.h $(obj)/exports_kernel_generated.h \ + $(if $(CONFIG_RUST_INLINE_HELPERS),,$(obj)/exports_helpers_generated.h) + # Disable symbol versioning for exports.o to avoid conflicts with the actual # symbol versions generated from Rust objects. $(obj)/exports.o: private skip_gendwarfksyms = 1 -- 2.55.0