From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 BEC28348883 for ; Tue, 7 Jul 2026 10:06:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783418772; cv=none; b=EtpfuqaZKlV2esKsiMV9ui8QiV7aEn3KOVWsWArwnHWQ7odg6qsAbZKRTHXizA0++/r5jbre04LwclSfrRSUH3xp+kzI3CRc6UZizBZtQrlTvzDtE3hbi+ls4+naNeqAQOP9T1f3y/4ZvyRrd/sZfNiUTRWF0SfAHPif3Y0EWak= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783418772; c=relaxed/simple; bh=mtaOxKjGcGyA3UhBxiTavYahl56JxUzGq6xH1lxoz70=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ifINqKsEzipdf/A8hb7z4lT2/FCgu5GszSIqIZylbPY16BWMWl+aFx0osj7F/AjBve2/NffsPyi3TJqahW+Ab4qVrR0r79WU/EdLyBOeQLExQwUGT5+nDT/LB5zfwDFE+wL4EebHPLbIoPio+bM2sSwhMHgatOMoqPCuZpLwd/A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oUHpDMan; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oUHpDMan" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE1E91F000E9; Tue, 7 Jul 2026 10:06:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783418771; bh=iVAviCN7869jBAR3D9GRMf7uO9qtAANWt/58UgMTqEU=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=oUHpDManRFgR4KAFjo00AhRjf6aWtaBZCylwO8VTF/Ssnnqk3BldXcjN7TMn+pR3a fXmPBkJS5zHIHIEMMB8pM3hf9pVy+1es95CKqgJbPBXDD5Vul1KuQKTzxax7JN747r x7dQvklu854ppcSXzmWU8vaSvUX4sqx3F1BZTPtoRLthr7nlGfpFimT/H3cEr81Nje B7OvRiIdSbW8l5eCzWMnmysOsJiDYyC77/W/E8Oj6YGuM3jo0luS284kWZEXowhGUy uJZia6KvK7kjbtLvkZCCrl/1/3k7LUJUFLxV75f9TWXXis+QeDGbkCQlOVIIoWd0rs jLKl1tS1Xw//g== Message-ID: <776663aa-3378-4c55-8c2e-3231443dfee4@kernel.org> Date: Tue, 7 Jul 2026 12:06:07 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/kconfig: Drop redundant memory hotplug dependencies To: Kaitao Cheng , Andrew Morton , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Muchun Song , Kaitao Cheng References: <20260707090331.52971-1-kaitao.cheng@linux.dev> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260707090331.52971-1-kaitao.cheng@linux.dev> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/7/26 11:03, Kaitao Cheng wrote: > From: Kaitao Cheng > > MHP_MEMMAP_ON_MEMORY is defined inside the MEMORY_HOTPLUG block, and > MEMORY_HOTPLUG already depends on SPARSEMEM_VMEMMAP. Keep the explicit > MEMORY_HOTPLUG dependency for local readability, but drop the redundant > SPARSEMEM_VMEMMAP dependency. > > ZONE_DEVICE depends on MEMORY_HOTREMOVE, which depends on MEMORY_HOTPLUG. > MEMORY_HOTPLUG in turn depends on SPARSEMEM_VMEMMAP. Drop the direct > MEMORY_HOTPLUG and SPARSEMEM_VMEMMAP dependencies from ZONE_DEVICE. > > This does not change the set of valid configurations. > > Signed-off-by: Kaitao Cheng > --- > mm/Kconfig | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/mm/Kconfig b/mm/Kconfig > index 04fe5171bb8c..ff29f770d10a 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -596,7 +596,7 @@ config MEMORY_HOTREMOVE > > config MHP_MEMMAP_ON_MEMORY > def_bool y > - depends on MEMORY_HOTPLUG && SPARSEMEM_VMEMMAP > + depends on MEMORY_HOTPLUG > depends on ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE > > endif # MEMORY_HOTPLUG > @@ -1235,9 +1235,7 @@ config ZONE_DMA32 > > config ZONE_DEVICE > bool "Device memory (pmem, HMM, etc...) hotplug support" > - depends on MEMORY_HOTPLUG > depends on MEMORY_HOTREMOVE > - depends on SPARSEMEM_VMEMMAP > select XARRAY_MULTI I'm planning on merging MEMORY_HOTPLUG and MEMORY_HOTREMOVE soon, but for now that is good enough. Acked-by: David Hildenbrand (Arm) -- Cheers, David