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mm: release number of pages of a folio
Add a new function unpin_user_folio() to put the refs of a folio by npages count. The check for BIO_PAGE_PINNED flag is removed as it is already checked in bio_release_pages(). Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com> Tested-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Link: https://lore.kernel.org/r/20240911064935.5630-4-kundan.kumar@samsung.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -1597,6 +1597,7 @@ void unpin_user_pages_dirty_lock(struct page **pages, unsigned long npages,
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void unpin_user_page_range_dirty_lock(struct page *page, unsigned long npages,
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void unpin_user_page_range_dirty_lock(struct page *page, unsigned long npages,
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bool make_dirty);
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bool make_dirty);
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void unpin_user_pages(struct page **pages, unsigned long npages);
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void unpin_user_pages(struct page **pages, unsigned long npages);
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void unpin_user_folio(struct folio *folio, unsigned long npages);
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void unpin_folios(struct folio **folios, unsigned long nfolios);
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void unpin_folios(struct folio **folios, unsigned long nfolios);
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static inline bool is_cow_mapping(vm_flags_t flags)
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static inline bool is_cow_mapping(vm_flags_t flags)
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13
mm/gup.c
13
mm/gup.c
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@ -415,6 +415,19 @@ void unpin_user_pages(struct page **pages, unsigned long npages)
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}
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}
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EXPORT_SYMBOL(unpin_user_pages);
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EXPORT_SYMBOL(unpin_user_pages);
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/**
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* unpin_user_folio() - release pages of a folio
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* @folio: pointer to folio to be released
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* @npages: number of pages of same folio
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*
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* Release npages of the folio
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*/
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void unpin_user_folio(struct folio *folio, unsigned long npages)
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{
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gup_put_folio(folio, npages, FOLL_PIN);
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}
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EXPORT_SYMBOL(unpin_user_folio);
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/**
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/**
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* unpin_folios() - release an array of gup-pinned folios.
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* unpin_folios() - release an array of gup-pinned folios.
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* @folios: array of folios to be marked dirty and released.
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* @folios: array of folios to be marked dirty and released.
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