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b=hFtXQT6OCdEFnmK2sYb+inI52Hbl4yQkCPCXSDM28En3Xq3xAyswSY1HOYa0WAPu1 ODu3XklnvXtECZOFO9v28VTDhHi5LhT9qvb+fdIgdw3JJNHBlrZLnNeFI9GmncwXW0 Z0Ub52Ns27ueBTfV++ntEA1goclIqtQmy0a0M4WDK7f3rcgyeLBid+ENRqO9cFh+y1 FU5s6+sjInf6YRkEiSAuMWP7WeyZZeh3zvk5CaHlux36dw9a+58g8ZgOo7bfnAsOo5 jNKULZXzP8+w3aBDf7lFZ1Qh0tJaNXqpe3UVyctvW0jGXBeyIwYwu1WWkl1LfCtwkR AQUV6kX+bq7fA== Message-ID: <8ca92e46-07ec-4144-8583-5251cbb92da0@kernel.org> Date: Mon, 17 Aug 2026 11:32:54 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] mm: gup: cleanup the gup_fast_*() call chain To: Aristeu Rozanski , linux-mm@kvack.org Cc: Andrew Morton , Jason Gunthorpe , John Hubbard , Peter Xu References: <20260805035847.936054733@ruivo.org> <20260805035848.161794043@ruivo.org> 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: <20260805035848.161794043@ruivo.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 041BE100005 X-Stat-Signature: cppimrbdq5uibtybgwrg5ppugfbzdffo X-Rspam-User: X-HE-Tag: 1786959178-788262 X-HE-Meta: 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 laBN62u4 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/5/26 05:58, Aristeu Rozanski wrote: > Refactor gup_fast functions so each step of the way returns the number of > pages pinned. Because the previous step of the chain knows what the number > it should be, less indicates an error. This way there's no need to pass *nr > along. > > Suggested-by: David Hildenbrand > Link: https://lore.kernel.org/all/85e760cf-b994-40db-8d13-221feee55c60@redhat.com/T/#u > Cc: Andrew Morton > Cc: David Hildenbrand > Cc: Jason Gunthorpe > Cc: John Hubbard > Cc: Peter Xu > Signed-off-by: Aristeu Rozanski Thanks! Acked-by: David Hildenbrand (Arm) -- Cheers, David