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 EE505FED9E8 for ; Tue, 17 Mar 2026 16:57:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 666356B0092; Tue, 17 Mar 2026 12:57:20 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5EF836B0093; Tue, 17 Mar 2026 12:57:20 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4DF096B0095; Tue, 17 Mar 2026 12:57:20 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 38B0B6B0092 for ; Tue, 17 Mar 2026 12:57:20 -0400 (EDT) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id EA153B70BF for ; Tue, 17 Mar 2026 16:57:19 +0000 (UTC) X-FDA: 84556160598.27.087503D Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf14.hostedemail.com (Postfix) with ESMTP id 4B82710000D for ; Tue, 17 Mar 2026 16:57:18 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=kYLjGDyg; spf=pass (imf14.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1773766638; 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=d2Wi59pFWuonk6QVCe4wMivcllOZGJDpOnCIhiJ8kK0=; b=pAWRABkrjc1oyneIyFbWL65ArtDetIUwEf2chXVab9uGxCpABRG2MDd822dBXWM4MMBDid pTJACglt2kNlxzIVd/e2qQU1Qh/e/RRddn4dnGWuLHJFgzwB1L/DkrZVOwLh1t3Z3H+Hxj D2eaGjFLeQlz6GOt25175vwiK6hU4zs= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=kYLjGDyg; spf=pass (imf14.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1773766638; a=rsa-sha256; cv=none; b=IV2Ss4IkoeCS/JHXLIL852tA6+mJo7WSvIm3INB4Y2lYKfKR1NO/I3Dveg9gPdpBoOaihU EE1ChAC+nkmcKlOcntEUwLnAFwBcR82vVXr6O2eI2L7pAoFDqmr81f00rquNh2eQ0MG2U0 5sj2u54Eu+FUYRGnUgrE5+kVnLqp7zs= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 997AB60126; Tue, 17 Mar 2026 16:57:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC353C4CEF7; Tue, 17 Mar 2026 16:57:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773766637; bh=BWzG9/0Rza56pImCpceClbjm8voSGno8HwPH5Rkh+Mg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kYLjGDyg61omCXDRJEGsUHy/Y8yhVjt3XBOFEWT5DvBNW6/wOkTN2nrQp//iiamco J45Glob8YuJJh248GDDrl9TvvXrChdoD7QW45DlK+jNseB10iVb6OnmzEJ7xSGuzz9 MNqe9qt+Qb7aId7UG9ql6sLsx41tmjPUF2m9Gyb6H+0oKPeelgHh5uMD4f3yUA+N3s pXJsbZj69JuOo6hD01OFutFh7AwX5KIzlGFK2VNDQL+Oya5JE+s6s+UNqy8JNSaPp3 fPz4UJpOsugVgQRAEXpxCWnwEi6NWKzIdnWUHVOV6XH4J7B38d6Z6oTtR/T8AdgX4d rF7Vq6exNhoMw== From: "David Hildenbrand (Arm)" To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-cxl@vger.kernel.org, "David Hildenbrand (Arm)" , Andrew Morton , Oscar Salvador , Axel Rasmussen , Yuanchu Xie , Wei Xu , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Subject: [PATCH 04/14] mm/memory_hotplug: simplify check_pfn_span() Date: Tue, 17 Mar 2026 17:56:42 +0100 Message-ID: <20260317165652.99114-5-david@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260317165652.99114-1-david@kernel.org> References: <20260317165652.99114-1-david@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 4B82710000D X-Stat-Signature: o7pedb5w1736wm84ar4frsu9yquzcra6 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1773766638-586574 X-HE-Meta: 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 2jRV+iOG OCfaQEkqWw1U5i/bhwMyArPh2W7ev/xIrt9DeRBUF3daqIBdtSga8hpBimslwz+KzfLkWOL4c3CE3q88Qysl8zkONWj+y6qVy90epd557pitcHFrdcSb+hhxyKEyU0A2bzIvDDN7C6MXyTqfq/yRJCY4BM7UHxWifLCN0vt3sepjSaNZy/fJFMWeR2oQ7CqGmyCUjOc1B4ddU2zaTotTWCN4j5seDScSrBjQzxxQKLqP5JM19ObrVJYwyGbEfsFoYGUG0qlDKduMoM4ULOT6+gm2wu64ZefxC/q2y Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: We now always have CONFIG_SPARSEMEM_VMEMMAP, so remove the dead code. Signed-off-by: David Hildenbrand (Arm) --- mm/memory_hotplug.c | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 3495d94587e7..70e620496cec 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -320,21 +320,13 @@ static void release_memory_resource(struct resource *res) static int check_pfn_span(unsigned long pfn, unsigned long nr_pages) { /* - * Disallow all operations smaller than a sub-section and only - * allow operations smaller than a section for - * SPARSEMEM_VMEMMAP. Note that check_hotplug_memory_range() - * enforces a larger memory_block_size_bytes() granularity for - * memory that will be marked online, so this check should only - * fire for direct arch_{add,remove}_memory() users outside of - * add_memory_resource(). + * Disallow all operations smaller than a sub-section. + * Note that check_hotplug_memory_range() enforces a larger + * memory_block_size_bytes() granularity for memory that will be marked + * online, so this check should only fire for direct + * arch_{add,remove}_memory() users outside of add_memory_resource(). */ - unsigned long min_align; - - if (IS_ENABLED(CONFIG_SPARSEMEM_VMEMMAP)) - min_align = PAGES_PER_SUBSECTION; - else - min_align = PAGES_PER_SECTION; - if (!IS_ALIGNED(pfn | nr_pages, min_align)) + if (!IS_ALIGNED(pfn | nr_pages, PAGES_PER_SUBSECTION)) return -EINVAL; return 0; } -- 2.43.0