From patchwork Wed Nov 8 12:58:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 13449919 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E27E0C4332F for ; Wed, 8 Nov 2023 13:00:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 392B110E73D; Wed, 8 Nov 2023 13:00:38 +0000 (UTC) Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1A57C10E73D for ; Wed, 8 Nov 2023 13:00:36 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 3F15ACE109D; Wed, 8 Nov 2023 13:00:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE3C9C43395; Wed, 8 Nov 2023 13:00:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699448431; bh=K9YdPzoARD4njnEo80jUrY+DZkb+0aAdqYzClA8UgAI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HyUdTwUXtZOlnyvxdNKc+kj+jb0JvSjpSyNuNfinD/hOMX3R5j5WCRvrkFeKCIoaK dck1LhuXouzgxrjEZ+GfXmwACWuIHu7Z5T4tv5Ur3mBUern292mV3o4hHeM6goJmTl 07hDeR7Iqhwa3/f+qzmGQajf1dFdpx/z/q8jYxJI4nnayQSqsNQMlgpL0fthML/+e1 RUA1p/Ek88IwoPkFfFrEZT9/Y2MOyc8v/2srZE3JErq77d73XQLbdWL9p5SFFwRzqp V4Zk/JhktD/mAeNqOSIIMV3pGJDyvfJKmq7usGaEaG4ltRDerYT+4+zq3kRGWGhqoG rX6LOl910Dk3Q== From: Arnd Bergmann To: Andrew Morton , linux-kernel@vger.kernel.org, Masahiro Yamada , linux-kbuild@vger.kernel.org Subject: [PATCH 06/22] [RESEND] stackleak: add declarations for global functions Date: Wed, 8 Nov 2023 13:58:27 +0100 Message-Id: <20231108125843.3806765-7-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231108125843.3806765-1-arnd@kernel.org> References: <20231108125843.3806765-1-arnd@kernel.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Juri Lelli , linux-fbdev@vger.kernel.org, x86@kernel.org, loongarch@lists.linux.dev, linux-sh@vger.kernel.org, Peter Zijlstra , Catalin Marinas , dri-devel@lists.freedesktop.org, netdev@vger.kernel.org, Guo Ren , Anil S Keshavamurthy , sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, Vincenzo Frascino , Will Deacon , Greg Ungerer , Nicolas Schier , linux-s390@vger.kernel.org, Vincent Guittot , Michael Ellerman , Helge Deller , Huacai Chen , Russell King , Christophe Leroy , Ard Biesheuvel , linux-bcachefs@vger.kernel.org, Ingo Molnar , Vineet Gupta , "Naveen N. Rao" , Matt Turner , linux-snps-arc@lists.infradead.org, linux-trace-kernel@vger.kernel.org, Kees Cook , Arnd Bergmann , Heiko Carstens , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , linuxppc-dev@lists.ozlabs.org, Nicholas Piggin , Nathan Chancellor , linux-m68k@lists.linux-m68k.org, linux-csky@vger.kernel.org, Steven Rostedt , Andy Lutomirski , John Paul Adrian Glaubitz , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Michal Simek , Thomas Bogendoerfer , linux-parisc@vger.kernel.org, Timur Tabi , Geoff Levand , Greg Kroah-Hartman , Kent Overstreet , Nick Desaulniers , linux-mips@vger.kernel.org, Sudip Mukherjee , Dinh Nguyen , linux-usb@vger.kernel.org, Palmer Dabbelt , Masami Hiramatsu , linux-alpha@vger.kernel.org, linux-mtd@lists.infradead.org, David Woodhouse , "David S. Miller" , Al Viro Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Arnd Bergmann With -Wmissing-prototypes enabled, the stackleak code produces a couple of warnings that have no declarations because they are only called from assembler: stackleak.c:127:25: error: no previous prototype for 'stackleak_erase' [-Werror=missing-prototypes] stackleak.c:139:25: error: no previous prototype for 'stackleak_erase_on_task_stack' [-Werror=missing-prototypes] stackleak.c:151:25: error: no previous prototype for 'stackleak_erase_off_task_stack' [-Werror=missing-prototypes] stackleak.c:159:49: error: no previous prototype for 'stackleak_track_stack' [-Werror=missing-prototypes] Add declarations to the stackleak header to shut up the warnings. Signed-off-by: Arnd Bergmann --- include/linux/stackleak.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/stackleak.h b/include/linux/stackleak.h index c36e7a3b45e7..3be2cb564710 100644 --- a/include/linux/stackleak.h +++ b/include/linux/stackleak.h @@ -14,6 +14,7 @@ #ifdef CONFIG_GCC_PLUGIN_STACKLEAK #include +#include /* * The lowest address on tsk's stack which we can plausibly erase. @@ -76,6 +77,11 @@ static inline void stackleak_task_init(struct task_struct *t) # endif } +asmlinkage void noinstr stackleak_erase(void); +asmlinkage void noinstr stackleak_erase_on_task_stack(void); +asmlinkage void noinstr stackleak_erase_off_task_stack(void); +void __no_caller_saved_registers noinstr stackleak_track_stack(void); + #else /* !CONFIG_GCC_PLUGIN_STACKLEAK */ static inline void stackleak_task_init(struct task_struct *t) { } #endif