AEC018DD80310DB0F87B9AF # ˆÄà ƒ™Âa–Ým_J*j"Tâ€fãlÜTÅ£Á¸ /* SPDX-License-Identifier: GPL-2.0 */ /* * include/linux/pagevec.h * * In many places it is efficient to batch an operation up against multiple * folios. A folio_batch is a container which is used for that. */ #ifndef _LINUX_PAGEVEC_H #define _LINUX_PAGEVEC_H #include /* 15 pointers + header align the folio_batch structure to a power of two */ #define PAGEVEC_SIZE 15 struct folio; /** * struct folio_batch - A collection of folios. * * The folio_batch is used to amortise the cost of retrieving and * operating on a set of folios. The order of folios in the batch may be * significant (eg delete_from_page_cache_batch()). Some users of the * folio_batch store "exceptional" entries in it which can be removed * by calling folio_batch_remove_exceptionals(). */ struct folio_batch { unsigned char nr; bool percpu_pvec_drained; struct folio *folios[PAGEVEC_SIZE]; }; /** * folio_batch_init() - Initialise a batch of folios * @fbatch: The folio batch. * * A freshly initialised folio_batch contains zero folios. */ static inline void folio_batch_init(struct folio_batch *fbatch) { fbatch->nr = 0; fbatch->percpu_pvec_drained = false; } static inline void folio_batch_reinit(struct folio_batch *fbatch) { fbatch->nr = 0; } static inline unsigned int folio_batch_count(struct folio_batch *fbatch) { return fbatch->nr; } static inline unsigned int folio_batch_space(struct folio_batch *fbatch) { return PAGEVEC_SIZE - fbatch->nr; } /** * folio_batch_add() - Add a folio to a batch. * @fbatch: The folio batch. * @folio: The folio to add. * * The folio is added to the end of the batch. * The batch must have previously been initialised using folio_batch_init(). * * Return: The number of slots still available. */ static inline unsigned folio_batch_add(struct folio_batch *fbatch, struct folio *folio) { fbatch->folios[fbatch->nr++] = folio; return folio_batch_space(fbatch); } void __folio_batch_release(struct folio_batch *pvec); static inline void folio_batch_release(struct folio_batch *fbatch) { if (folio_batch_count(fbatch)) __folio_batch_release(fbatch); } void folio_batch_remove_exceptionals(struct folio_batch *fbatch); #endif /* _LINUX_PAGEVEC_H */  ˆ ƒ.ƒÀ¾Á B Index of /FSS-OZR/root/sys/dev/char/13:64/subsystem/input5/device

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