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 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 89E17CAC5B0 for ; Fri, 3 Oct 2025 07:03:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 22AEC10E8D5; Fri, 3 Oct 2025 07:03:35 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=amazon.com header.i=@amazon.com header.b="FTWyKD1Y"; dkim-atps=neutral Received: from fra-out-006.esa.eu-central-1.outbound.mail-perimeter.amazon.com (fra-out-006.esa.eu-central-1.outbound.mail-perimeter.amazon.com [18.197.217.180]) by gabe.freedesktop.org (Postfix) with ESMTPS id 74F8310E839; Thu, 2 Oct 2025 18:04:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1759428254; x=1790964254; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8djAgabF22BDsxfYcNFa72Q6mXnC3doUyHk+thXHzBc=; b=FTWyKD1YSY5D5HDq5Kv2QqUZLvLqLhHuljpd0kHqlCPlF5dvzjBOmrGW 2I0Nd9bQhF3y3YPDmZ3BNMM4Ro5TWEdRLs1gF3+JBqXuz/6vTzwaL5XQC j3eOISMmAGWl3cpn5DX9abHu5GulO4UPjoTFN4jH5vA2GuX6+Fbl7nnLI 4D+0DL5oi6YefaKHISaLQqVwofkHxV3xGK5FMGfzCBV9t0E3WP3DLpAoF NGXlATeajTmlxHfrn5ay7ughc6sQKgAfSR4PDBd3cXCXzOLBZAIQ+T2Z6 Zq0R+gPzMGDQPm12i4DNM/b8zZ3LhUMPz1SfGVTdGuDgGy6CWFamr/Tha Q==; X-CSE-ConnectionGUID: F7O/5rBXTzqs19lYsV5CmA== X-CSE-MsgGUID: o2hCyg+aTY+SwcYUrqeRgA== X-IronPort-AV: E=Sophos;i="6.18,310,1751241600"; d="scan'208";a="3022665" Received: from ip-10-6-11-83.eu-central-1.compute.internal (HELO smtpout.naws.eu-central-1.prod.farcaster.email.amazon.dev) ([10.6.11.83]) by internal-fra-out-006.esa.eu-central-1.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Oct 2025 18:04:12 +0000 Received: from EX19MTAEUC002.ant.amazon.com [54.240.197.228:20291] by smtpin.naws.eu-central-1.prod.farcaster.email.amazon.dev [10.0.44.161:2525] with esmtp (Farcaster) id 37e09462-d867-4507-b788-f974d13c29ea; Thu, 2 Oct 2025 18:04:12 +0000 (UTC) X-Farcaster-Flow-ID: 37e09462-d867-4507-b788-f974d13c29ea Received: from EX19D018EUA004.ant.amazon.com (10.252.50.85) by EX19MTAEUC002.ant.amazon.com (10.252.51.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.20; Thu, 2 Oct 2025 18:04:10 +0000 Received: from dev-dsk-farbere-1a-46ecabed.eu-west-1.amazon.com (172.19.116.181) by EX19D018EUA004.ant.amazon.com (10.252.50.85) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.20; Thu, 2 Oct 2025 18:03:58 +0000 From: Eliav Farber To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Arnd Bergmann , Christoph Hellwig , Dan Carpenter , "Jason A. Donenfeld" , Jens Axboe , Lorenzo Stoakes , Mateusz Guzik , "Matthew Wilcox" , Pedro Falcato Subject: [PATCH v3 10/11 6.1.y] minmax.h: simplify the variants of clamp() Date: Thu, 2 Oct 2025 18:00:28 +0000 Message-ID: <20251002180036.33738-11-farbere@amazon.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251002180036.33738-1-farbere@amazon.com> References: <20251002180036.33738-1-farbere@amazon.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [172.19.116.181] X-ClientProxiedBy: EX19D040UWA001.ant.amazon.com (10.13.139.22) To EX19D018EUA004.ant.amazon.com (10.252.50.85) X-Mailman-Approved-At: Fri, 03 Oct 2025 07:03:32 +0000 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: David Laight [ Upstream commit 495bba17cdf95e9703af1b8ef773c55ef0dfe703 ] Always pass a 'type' through to __clamp_once(), pass '__auto_type' from clamp() itself. The expansion of __types_ok3() is reasonable so it isn't worth the added complexity of avoiding it when a fixed type is used for all three values. Link: https://lkml.kernel.org/r/8f69f4deac014f558bab186444bac2e8@AcuMS.aculab.com Signed-off-by: David Laight Cc: Andy Shevchenko Cc: Arnd Bergmann Cc: Christoph Hellwig Cc: Dan Carpenter Cc: Jason A. Donenfeld Cc: Jens Axboe Cc: Lorenzo Stoakes Cc: Mateusz Guzik Cc: Matthew Wilcox Cc: Pedro Falcato Signed-off-by: Andrew Morton Signed-off-by: Eliav Farber --- include/linux/minmax.h | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/include/linux/minmax.h b/include/linux/minmax.h index 75fb7a6ad4c6..2bbdd5b5e07e 100644 --- a/include/linux/minmax.h +++ b/include/linux/minmax.h @@ -183,29 +183,29 @@ #define __clamp(val, lo, hi) \ ((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val))) -#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({ \ - __auto_type uval = (val); \ - __auto_type ulo = (lo); \ - __auto_type uhi = (hi); \ +#define __clamp_once(type, val, lo, hi, uval, ulo, uhi) ({ \ + type uval = (val); \ + type ulo = (lo); \ + type uhi = (hi); \ BUILD_BUG_ON_MSG(statically_true(ulo > uhi), \ "clamp() low limit " #lo " greater than high limit " #hi); \ BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi), \ "clamp("#val", "#lo", "#hi") signedness error"); \ __clamp(uval, ulo, uhi); }) -#define __careful_clamp(val, lo, hi) \ - __clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_)) +#define __careful_clamp(type, val, lo, hi) \ + __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_)) /** - * clamp - return a value clamped to a given range with strict typechecking + * clamp - return a value clamped to a given range with typechecking * @val: current value * @lo: lowest allowable value * @hi: highest allowable value * - * This macro does strict typechecking of @lo/@hi to make sure they are of the - * same type as @val. See the unnecessary pointer comparisons. + * This macro checks @val/@lo/@hi to make sure they have compatible + * signedness. */ -#define clamp(val, lo, hi) __careful_clamp(val, lo, hi) +#define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi) /** * clamp_t - return a value clamped to a given range using a given type @@ -217,7 +217,7 @@ * This macro does no typechecking and uses temporary variables of type * @type to make all the comparisons. */ -#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi)) +#define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi) /** * clamp_val - return a value clamped to a given range using val's type @@ -230,7 +230,7 @@ * type and @lo and @hi are literals that will otherwise be assigned a signed * integer type. */ -#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi) +#define clamp_val(val, lo, hi) __careful_clamp(typeof(val), val, lo, hi) /* * Do not check the array parameter using __must_be_array(). -- 2.47.3