From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC6AAC77B61 for ; Mon, 24 Apr 2023 13:33:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232515AbjDXNda (ORCPT ); Mon, 24 Apr 2023 09:33:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232544AbjDXNdI (ORCPT ); Mon, 24 Apr 2023 09:33:08 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C66B77EFA for ; Mon, 24 Apr 2023 06:32:52 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9195362388 for ; Mon, 24 Apr 2023 13:32:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5624C433EF; Mon, 24 Apr 2023 13:32:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1682343167; bh=0Sm3/m/sbl6YkZnwnL8cRMncGNL49HXMeMUIbD4wg4o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gXejPbC0N9TVpq/89bvKOdUaCrzgJFIe37LZ6SPk8rmIwnwEMneC5q+ImKwRjas3S T3LXteVEqV47knQ0OpTslCFAlecqccxbGm8JiLkG6hdaZ9XKXhDI3LSW6eWLicdtGH Lvw+z6akHMr8ljG7PETRBAg1wQX+cevGvHj4OR30= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, David Gow , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Vincenzo Palazzo , Miguel Ojeda Subject: [PATCH 6.2 062/110] rust: kernel: Mark rust_fmt_argument as extern "C" Date: Mon, 24 Apr 2023 15:17:24 +0200 Message-Id: <20230424131138.643637908@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230424131136.142490414@linuxfoundation.org> References: <20230424131136.142490414@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Gow commit c682e4c37d2b8ba3bde1125cbbea4ee88824b4e2 upstream. The rust_fmt_argument function is called from printk() to handle the %pA format specifier. Since it's called from C, we should mark it extern "C" to make sure it's ABI compatible. Cc: stable@vger.kernel.org Fixes: 247b365dc8dc ("rust: add `kernel` crate") Signed-off-by: David Gow Reviewed-by: Gary Guo Reviewed-by: Björn Roy Baron Reviewed-by: Vincenzo Palazzo [Applied `rustfmt`] Signed-off-by: Miguel Ojeda Signed-off-by: Greg Kroah-Hartman --- rust/kernel/print.rs | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/rust/kernel/print.rs +++ b/rust/kernel/print.rs @@ -18,7 +18,11 @@ use crate::bindings; // Called from `vsprintf` with format specifier `%pA`. #[no_mangle] -unsafe fn rust_fmt_argument(buf: *mut c_char, end: *mut c_char, ptr: *const c_void) -> *mut c_char { +unsafe extern "C" fn rust_fmt_argument( + buf: *mut c_char, + end: *mut c_char, + ptr: *const c_void, +) -> *mut c_char { use fmt::Write; // SAFETY: The C contract guarantees that `buf` is valid if it's less than `end`. let mut w = unsafe { RawFormatter::from_ptrs(buf.cast(), end.cast()) };