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Mercier" , =?UTF-8?Q?Christian_K=C3=B6nig?= , Marek Szyprowski , Robin Murphy , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Cc: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-mm@kvack.org References: <20260225-dma-buf-heaps-as-modules-v1-0-2109225a090d@kernel.org> <20260225-dma-buf-heaps-as-modules-v1-2-2109225a090d@kernel.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: <20260225-dma-buf-heaps-as-modules-v1-2-2109225a090d@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: B1541100003 X-Stat-Signature: swyhw7nxzz5g9dec7nhpsroq46jzgqcc X-HE-Tag: 1772101532-850554 X-HE-Meta: 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 xVcknMmQ Hb9ALEWbhBB7e5W8MkW1RKsOlx6wMmJzmiAwCe8JDTJ9b/qHDa8Zp6Y8UeD9nNCn4Tqkmsy/ajJUf4B3L1mJmOvBJ7FhWcjYzyhg4zNkdMzpeUSx3zsF3M0SovE0655PUvofsQn29FBOs5JO4I5wgDYfqc4w2aiTjcNx6KxF6QmZVCJYhZ+aHzC/qTlnmkWYsYsReglEZCRcPkkbudSoCT1EiunvhNUG/AdUVjwlg7E5T2tJWF7iUgBY5LP8xJOVCAc4usvuzRzn8eXmCZt8rb31ApqbawboxvAAKJTwcxSuCUlq78LTFmXL3goV2nfkNrlmNXjKVhpnSIH8= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2/25/26 17:41, Maxime Ripard wrote: > The CMA dma-buf heap uses cma_alloc() and cma_release() to allocate and > free, respectively, its CMA buffers. > > However, these functions are not exported. Since we want to turn the CMA > heap into a module, let's export them both. > > Signed-off-by: Maxime Ripard > --- > mm/cma.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/mm/cma.c b/mm/cma.c > index 94b5da468a7d719e5144d33b06bcc7619c0fbcc9..be142b473f3bd41b9c7d8ba4397f018f6993d962 100644 > --- a/mm/cma.c > +++ b/mm/cma.c > @@ -949,10 +949,11 @@ struct page *cma_alloc(struct cma *cma, unsigned long count, > if (page) > set_pages_refcounted(page, count); > > return page; > } > +EXPORT_SYMBOL_GPL(cma_alloc); > > static struct cma_memrange *find_cma_memrange(struct cma *cma, > const struct page *pages, unsigned long count) > { > struct cma_memrange *cmr = NULL; > @@ -1025,10 +1026,11 @@ bool cma_release(struct cma *cma, const struct page *pages, > > __cma_release_frozen(cma, cmr, pages, count); > > return true; > } > +EXPORT_SYMBOL_GPL(cma_release); > > bool cma_release_frozen(struct cma *cma, const struct page *pages, > unsigned long count) > { > struct cma_memrange *cmr; > I'm wondering whether we want to restrict all these exports to the dma-buf module only using EXPORT_SYMBOL_FOR_MODULES(). Especially dma_contiguous_default_area() (patch #4), I am not sure whether we want arbitrary modules to mess with that. -- Cheers, David