mm/folio-compat.c

   1 /*
   2  * Compatibility functions which bloat the callers too much to make inline.
   3  * All of the callers of these functions should be converted to use folios
   4  * eventually.
   5  */
   6
   7 #include <linux/migrate.h>
   8 #include <linux/pagemap.h>
   9 #include <linux/swap.h>
  10 #include "internal.h"
  11
  12 struct address_space *page_mapping(struct page *page)
  13 {
  14         return folio_mapping(page_folio(page));
  15 }
  16 EXPORT_SYMBOL(page_mapping);
  17
  18 void unlock_page(struct page *page)
  19 {
  20         return folio_unlock(page_folio(page));
  21 }
  22 EXPORT_SYMBOL(unlock_page);
  23
  24 void end_page_writeback(struct page *page)
  25 {
  26         return folio_end_writeback(page_folio(page));
  27 }
  28 EXPORT_SYMBOL(end_page_writeback);
  29
  30 void wait_on_page_writeback(struct page *page)
  31 {
  32         return folio_wait_writeback(page_folio(page));
  33 }
  34 EXPORT_SYMBOL_GPL(wait_on_page_writeback);
  35
  36 void wait_for_stable_page(struct page *page)
  37 {
  38         return folio_wait_stable(page_folio(page));
  39 }
  40 EXPORT_SYMBOL_GPL(wait_for_stable_page);
  41
  42 bool page_mapped(struct page *page)
  43 {
  44         return folio_mapped(page_folio(page));
  45 }
  46 EXPORT_SYMBOL(page_mapped);
  47
  48 void mark_page_accessed(struct page *page)
  49 {
  50         folio_mark_accessed(page_folio(page));
  51 }
  52 EXPORT_SYMBOL(mark_page_accessed);
  53
  54 bool set_page_writeback(struct page *page)
  55 {
  56         return folio_start_writeback(page_folio(page));
  57 }
  58 EXPORT_SYMBOL(set_page_writeback);
  59
  60 bool set_page_dirty(struct page *page)
  61 {
  62         return folio_mark_dirty(page_folio(page));
  63 }
  64 EXPORT_SYMBOL(set_page_dirty);
  65
  66 int __set_page_dirty_nobuffers(struct page *page)
  67 {
  68         return filemap_dirty_folio(page_mapping(page), page_folio(page));
  69 }
  70 EXPORT_SYMBOL(__set_page_dirty_nobuffers);
  71
  72 bool clear_page_dirty_for_io(struct page *page)
  73 {
  74         return folio_clear_dirty_for_io(page_folio(page));
  75 }
  76 EXPORT_SYMBOL(clear_page_dirty_for_io);
  77
  78 bool redirty_page_for_writepage(struct writeback_control *wbc,
  79                 struct page *page)
  80 {
  81         return folio_redirty_for_writepage(wbc, page_folio(page));
  82 }
  83 EXPORT_SYMBOL(redirty_page_for_writepage);
  84
  85 void lru_cache_add(struct page *page)
  86 {
  87         folio_add_lru(page_folio(page));
  88 }
  89 EXPORT_SYMBOL(lru_cache_add);
  90
  91 int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
  92                 pgoff_t index, gfp_t gfp)
  93 {
  94         return filemap_add_folio(mapping, page_folio(page), index, gfp);
  95 }
  96 EXPORT_SYMBOL(add_to_page_cache_lru);
  97
  98 noinline
  99 struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
 100                 int fgp_flags, gfp_t gfp)
 101 {
 102         struct folio *folio;
 103
 104         folio = __filemap_get_folio(mapping, index, fgp_flags, gfp);
 105         if ((fgp_flags & FGP_HEAD) || !folio || xa_is_value(folio))
 106                 return &folio->page;
 107         return folio_file_page(folio, index);
 108 }
 109 EXPORT_SYMBOL(pagecache_get_page);
 110
 111 struct page *grab_cache_page_write_begin(struct address_space *mapping,
 112                                         pgoff_t index)
 113 {
 114         unsigned fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
 115
 116         return pagecache_get_page(mapping, index, fgp_flags,
 117                         mapping_gfp_mask(mapping));
 118 }
 119 EXPORT_SYMBOL(grab_cache_page_write_begin);
 120
 121 void delete_from_page_cache(struct page *page)
 122 {
 123         return filemap_remove_folio(page_folio(page));
 124 }
 125
 126 int try_to_release_page(struct page *page, gfp_t gfp)
 127 {
 128         return filemap_release_folio(page_folio(page), gfp);
 129 }
 130 EXPORT_SYMBOL(try_to_release_page);
 131
 132 int isolate_lru_page(struct page *page)
 133 {
 134         if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
 135                 return -EBUSY;
 136         return folio_isolate_lru((struct folio *)page);
 137 }
 138
 139 void putback_lru_page(struct page *page)
 140 {
 141         folio_putback_lru(page_folio(page));
 142 }