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| author | Kundan Kumar <kundan.kumar@samsung.com> | 2024-09-11 08:49:34 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-09-11 15:24:01 +0200 |
| commit | d3bfbfb1248498656cd25c51e41c1e31219bd0dd (patch) | |
| tree | 77b5c25b9a8f912a652b81863e5bfa359823da07 | |
| parent | block: introduce folio awareness and add a bigger size from folio (diff) | |
| download | linux-d3bfbfb1248498656cd25c51e41c1e31219bd0dd.tar.xz linux-d3bfbfb1248498656cd25c51e41c1e31219bd0dd.zip | |
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>
| -rw-r--r-- | include/linux/mm.h | 1 | ||||
| -rw-r--r-- | mm/gup.c | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index c4b238a20b76..2fd88cd5997d 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1597,6 +1597,7 @@ void unpin_user_pages_dirty_lock(struct page **pages, unsigned long npages, void unpin_user_page_range_dirty_lock(struct page *page, unsigned long npages, bool make_dirty); void unpin_user_pages(struct page **pages, unsigned long npages); +void unpin_user_folio(struct folio *folio, unsigned long npages); void unpin_folios(struct folio **folios, unsigned long nfolios); static inline bool is_cow_mapping(vm_flags_t flags) @@ -416,6 +416,19 @@ void unpin_user_pages(struct page **pages, unsigned long npages) EXPORT_SYMBOL(unpin_user_pages); /** + * unpin_user_folio() - release pages of a folio + * @folio: pointer to folio to be released + * @npages: number of pages of same folio + * + * Release npages of the folio + */ +void unpin_user_folio(struct folio *folio, unsigned long npages) +{ + gup_put_folio(folio, npages, FOLL_PIN); +} +EXPORT_SYMBOL(unpin_user_folio); + +/** * unpin_folios() - release an array of gup-pinned folios. * @folios: array of folios to be marked dirty and released. * @nfolios: number of folios in the @folios array. |