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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A1183D3E781 for ; Wed, 10 Dec 2025 22:46:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0A0436B0007; Wed, 10 Dec 2025 17:46:41 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 0785A6B0008; Wed, 10 Dec 2025 17:46:41 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ECFD46B000A; Wed, 10 Dec 2025 17:46:40 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id DD72E6B0007 for ; Wed, 10 Dec 2025 17:46:40 -0500 (EST) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 66AD6BAB6B for ; Wed, 10 Dec 2025 22:46:40 +0000 (UTC) X-FDA: 84205047360.25.5D5DF2A Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf14.hostedemail.com (Postfix) with ESMTP id BD569100002 for ; Wed, 10 Dec 2025 22:46:38 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=p0j+r5f9; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of alx@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=alx@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1765406798; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=CNXDhEfUs2p7rqxHrG1BCgqb9DusTf8GED65ME2P2Z0=; b=g6rQ6EYFpy8LXC26QkBrh4WbPwWR68Q6GDeay11hdeZRCBEZ435jCjcpNTIwpF9+bwyOqV pIhZXPIPbmpVitfDM3sm5IXIc1vLovT6/ALWox1E5OnzNzoCcyFkW+yi+EADJh76sN8X2w 4rBjd0SzOUXWdltubszyKjxjEZnobrE= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=p0j+r5f9; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of alx@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=alx@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1765406798; a=rsa-sha256; cv=none; b=JirQttEPUFjbVd9J4xF/IzkC4kDRRG2B4hL4smmZeYp9LjGWTe+XiT2cx/XxZeeZeuglJn 8nmzUHKBfjy2zGsaGW2DjJn4WybTK8yzOQIDXL0LMoSA/AmTX09QXcN6dlRvcSHoTsRTXB 6ph8qQmI5ZCc9igvub3HfI6vKjAoggA= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id DA1A143C84; Wed, 10 Dec 2025 22:46:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF61DC4CEF7; Wed, 10 Dec 2025 22:46:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765406797; bh=2xVmGhP0PFx/hs6+oME8OSKXBynf/1IS5/aMFkAz6UI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=p0j+r5f9ceLd8JHdJaXG7/kP8pHtSxWUPFhU+TbgylfEi6XsCOmOT7ltMtjUZtofz Qs1F+acTHhoCLqplDmCTxk9we3iblfj2QoOLV78cMgJf2XnhfPwfuXrjyBm0TgaIuP D5OMULpUvRNtf24eC2PYQhofqtglZFrh2rA5QOqN0vK/E6WtbZ22LfeQD4pTYsuqye s3IZnsmwfqd1GpC8sFO37M4ynILFwQuQST9kbk47DJm6ArDM/BTk3WhCTA99mwg4iR ehvsbtK5Kwr39gN2HxoYTOuanvMnE16zsb0qeY/eVBI6ELoiJucKZE4NdeX2Fxt7ca nPMzwhrijLiww== Date: Wed, 10 Dec 2025 23:46:32 +0100 From: Alejandro Colomar To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Alejandro Colomar , Kees Cook , Christopher Bazley , Rasmus Villemoes , Marco Elver , Michal Hocko , Linus Torvalds , Al Viro , Alexander Potapenko , Dmitry Vyukov , Jann Horn , Andrew Morton , "Maciej W. Rozycki" Subject: [PATCH v5 1/4] array_size.h: Add ARRAY_END() Message-ID: <5973cfb674192bc8e533485dbfb54e3062896be1.1765406337.git.alx@kernel.org> X-Mailer: git-send-email 2.51.0 References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Stat-Signature: y7gbxfo981tqhs67hj67htekxtba59g9 X-Rspamd-Queue-Id: BD569100002 X-Rspamd-Server: rspam06 X-HE-Tag: 1765406798-843243 X-HE-Meta: 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 /uGtlmWk +8k7U1uZbx/CNW5elglZQkBGKWJe0rj0cpzXcwRwyr9iavhM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: ARRAY_END() returns a pointer one past the end of the last element in the array argument. This pointer is useful for iterating over the elements of an array: for (T *p = a, p < ARRAY_END(a); p++) ... Cc: Kees Cook Cc: Christopher Bazley Cc: Rasmus Villemoes Cc: Marco Elver Cc: Michal Hocko Cc: Linus Torvalds Cc: Al Viro Cc: "Maciej W. Rozycki" Signed-off-by: Alejandro Colomar Message-ID: <37b1088dbd01a21d2f9d460aa510726119b3bcb0.1752193588.git.alx@kernel.org> --- drivers/block/floppy.c | 2 -- include/linux/array_size.h | 6 ++++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 5336c3c5ca36..69661840397e 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -4802,8 +4802,6 @@ static void floppy_release_allocated_regions(int fdc, const struct io_region *p) } } -#define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) - static int floppy_request_regions(int fdc) { const struct io_region *p; diff --git a/include/linux/array_size.h b/include/linux/array_size.h index 06d7d83196ca..0c4fec98822e 100644 --- a/include/linux/array_size.h +++ b/include/linux/array_size.h @@ -10,4 +10,10 @@ */ #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) +/** + * ARRAY_END - get a pointer to one past the last element in array @arr + * @arr: array + */ +#define ARRAY_END(arr) (&(arr)[ARRAY_SIZE(arr)]) + #endif /* _LINUX_ARRAY_SIZE_H */ -- 2.51.0