From mboxrd@z Thu Jan 1 00:00:00 1970 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 9E31521CFF6 for ; Sun, 9 Nov 2025 18:06:59 +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=1762711620; cv=none; b=Jc5q0S6RD8aajEDSKxyfx8YERSQLal+AXA1ylhz3cRpR+VfSKDRnjekuAxhEAwdXuWjcyFptbca2zZcZh4lI0d3pcpUHHQZwULu1AsMosGhq2KbA0DRUM/166qJz9XUEOj/Tvs+3T2sUQHAh6L0Q2bb2LvC9/VLCORzVpnV+Ahc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762711620; c=relaxed/simple; bh=NCUBtJbYbJUSM0PsF/hMhn60Ld0of4iArhANi0uVhgc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Cb6yEtySAGbgV5JBvr/vVGXMo9folT27PQUk/B/n5tnjECtMXr6ZW9JvhwvnhosigeshJIf01EwCeT+XfgSswXrxRFxrYxWkYDWA5mN1oxdlaAoZuR9LaXQRUPtjFDOEA+KOh1R1kIMnG1XfVOU/EyjgiAzEVj7Z/+k0TvpiY0Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aDkCAdDT; 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="aDkCAdDT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 423E4C4CEFB; Sun, 9 Nov 2025 18:06:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762711619; bh=NCUBtJbYbJUSM0PsF/hMhn60Ld0of4iArhANi0uVhgc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aDkCAdDTBKcWRXGOcI+UXsgw84QaqZW8IzPm/a5rL26dy7qe0gMOs2b6A+v9DgZj2 +DIGa0IqVmPRS/VbYmO4TJJYdIUvsj6jXaQrQ5yBqUR+cIN15YTt73BjpaPdLFmRgc vCkxN7ZDOIWaOzuTDOqZDjpFyoH7hQBXCTHATd8m+SIsmvc0x6wH3gc2CAC2NYPxwf SabU9UBOkBkGKWrKgWjHub/Rdr7mMOcbR4e8SQ1306D4JrbsjjG6JKhkTsnrDhrs8P HGTtJ+zmeAlXnotgcVFov1Ztmv6+6SauSlmGzOAKT2Gt4meJIs6ftUeg0as/tFPkNy SCdW6cr5zTyAQ== Date: Sun, 9 Nov 2025 19:06:54 +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 Subject: [PATCH v3 1/4] array_size.h: Add ARRAY_END() Message-ID: <2cb4ddff93b3d3037ef8d094de94227982117f87.1762711279.git.alx@kernel.org> X-Mailer: git-send-email 2.51.0 References: 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-Disposition: inline In-Reply-To: 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 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..b5775b8f13de 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 @a + * @a: array + */ +#define ARRAY_END(a) (&(a)[ARRAY_SIZE(a)]) + #endif /* _LINUX_ARRAY_SIZE_H */ -- 2.51.0