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 01D78C43458 for ; Fri, 3 Jul 2026 00:43:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 557786B0102; Thu, 2 Jul 2026 20:43:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4E1DD6B0115; Thu, 2 Jul 2026 20:43:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3D1076B0116; Thu, 2 Jul 2026 20:43:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 0B0DB6B0102 for ; Thu, 2 Jul 2026 20:43:03 -0400 (EDT) Received: from smtpin18.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id EC58FC1827 for ; Thu, 2 Jul 2026 21:06:16 +0000 (UTC) X-FDA: 84945069552.18.EE7D2EE Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf15.hostedemail.com (Postfix) with ESMTP id 522F2A0007 for ; Thu, 2 Jul 2026 21:06:15 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=XjJmr1gQ; spf=pass (imf15.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783026375; b=soLWt7Mb1t5Gaej9HtZw1sZqW/ugRlYYfa8LGy1sUkG1LsUC41eHJuhs0RzUiy4u9/E5MY dTxjvR0571/daJb/GdHkL7I51mAw/E3tpisGiFF7mY0t2k9CGeFAJw8Cpnmbte8JJ0vexQ ldO3SgO1OANoLdgYm+yeHcg1N+aaspU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783026375; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=3BUtL0wdhRHBCOaPZNQsX8fjUI9m5nC+jbrg8ueFSt4=; b=P0sT32bfwVHIsGXtQ2FFsLmm8x9eBg+7BetwgqYZtJi/zB4Y2BALCmmULkBisIMsXY6Nzu Id/tbwnaI2LbHtJNV92kaLbJGSz6Stohps5FdpFJs5jUOj2M6amn7puhvIxa5jIdQaZL6b oBLSSI9E6SMeNKMcvnn2jn9QmQNhHdg= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=XjJmr1gQ; spf=pass (imf15.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 9F0CE42D61; Thu, 2 Jul 2026 21:06:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1F951F00A3E; Thu, 2 Jul 2026 21:06:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783026374; bh=3BUtL0wdhRHBCOaPZNQsX8fjUI9m5nC+jbrg8ueFSt4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=XjJmr1gQ51HXvJVpcXxk/bKSPfbeoxDgQExOGa2UWh8rMvyKzhr1k4+rn794A4jD1 Uncize0oEBLHFHMtajttgUcGKDfZPq128HITOPFHWlO2nezZAyDKmIc5NZgF1QVIJ/ +g1Ixii4KVAr1aCJhWnW1P1tQbB0WJJc+6yYap7s9rWM1FyXTSt9K1lNDPXbC+OaeM IABNn7MGGQVgVm1hJbOwakWUajkzQS3e4YECRdaeh+4izzNvjFT8sDJ/QwayXDNe7Y d6aMfWSqftpt+BRoHY+bHJZ4Ic1PXEo8mYk7aBYTCK/5lQdp8dRiEaiGc+kj3OPcwE +WYi6Ms0NAj0g== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v1.1 7/8] mm/damon/core: remove start, end check in damon_set_region_system_rams() Date: Thu, 2 Jul 2026 14:05:49 -0700 Message-ID: <20260702210551.95167-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260702210551.95167-1-sj@kernel.org> References: <20260702210551.95167-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 522F2A0007 X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: hsb1g5pa9tazzaf1ufk9t6r83d1ttrdk X-HE-Tag: 1783026375-467534 X-HE-Meta: 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 EYr/lEOz zDlV3wKmmutquDSRjwef4JbhqRD0yjHMj4dcEZ4aXy7a6TcCXQUjPeds+cQPgfh8pfMKnWS5TULVHSR7iNpa0eoNaDIXijqyso7Gt+q9dWiXgoIXM4G1XiamZCSwj95GwZUacy8Kxd9KbCxi3IyMJEPf8jBvW2j0xlrIsbyfMb4jZKFqmtpVKu/bSb+IRis874lPhI1CXHUYlfU0BqRCdRQkSMXY9wbBhnP8J4qVBqvvQqW7RKJIF5+QdxI3Y/lVc7C2Penkclt38SkScHMwV4ABcMuaWlsk4sw23Bp87PlvuZfkt3Lkk4Vk5ig== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: damon_set_region_system_rams() validates user inputs to avoid creating a negative size region. But DAMON core avoids zero size, too. The check is incomplete. The complete check is done inside damon_set_regions(), which is eventually called from damon_set_region_system_rams_default(). Drop the incomplete and unnecessary check. Signed-off-by: SJ Park --- mm/damon/core.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index ca301abcb9ec5..3c5a46e1c079a 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3846,9 +3846,6 @@ int damon_set_region_system_rams_default(struct damon_target *t, { struct damon_addr_range addr_range; - if (*start > *end) - return -EINVAL; - if (!*start && !*end && !damon_find_system_rams_range(start, end, addr_unit)) return -EINVAL; -- 2.47.3