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
  11 struct address_space *page_mapping(struct page *page)
  12 {
  13         return folio_mapping(page_folio(page));
  14 }
  15 EXPORT_SYMBOL(page_mapping);
  16
  17 void unlock_page(struct page *page)
  18 {
  19         return folio_unlock(page_folio(page));
  20 }
  21 EXPORT_SYMBOL(unlock_page);
  22
  23 void end_page_writeback(struct page *page)
  24 {
  25         return folio_end_writeback(page_folio(page));
  26 }
  27 EXPORT_SYMBOL(end_page_writeback);
  28
  29 void wait_on_page_writeback(struct page *page)
  30 {
  31         return folio_wait_writeback(page_folio(page));
  32 }
  33 EXPORT_SYMBOL_GPL(wait_on_page_writeback);
  34
  35 void wait_for_stable_page(struct page *page)
  36 {
  37         return folio_wait_stable(page_folio(page));
  38 }
  39 EXPORT_SYMBOL_GPL(wait_for_stable_page);
  40
  41 bool page_mapped(struct page *page)
  42 {
  43         return folio_mapped(page_folio(page));
  44 }
  45 EXPORT_SYMBOL(page_mapped);
  46
  47 void mark_page_accessed(struct page *page)
  48 {
  49         folio_mark_accessed(page_folio(page));
  50 }
  51 EXPORT_SYMBOL(mark_page_accessed);
  52
  53 #ifdef CONFIG_MIGRATION
  54 int migrate_page_move_mapping(struct address_space *mapping,
  55                 struct page *newpage, struct page *page, int extra_count)
  56 {
  57         return folio_migrate_mapping(mapping, page_folio(newpage),
  58                                         page_folio(page), extra_count);
  59 }
  60 EXPORT_SYMBOL(migrate_page_move_mapping);
  61
  62 void migrate_page_states(struct page *newpage, struct page *page)
  63 {
  64         folio_migrate_flags(page_folio(newpage), page_folio(page));
  65 }
  66 EXPORT_SYMBOL(migrate_page_states);
  67
  68 void migrate_page_copy(struct page *newpage, struct page *page)
  69 {
  70         folio_migrate_copy(page_folio(newpage), page_folio(page));
  71 }
  72 EXPORT_SYMBOL(migrate_page_copy);
  73 #endif
  74
  75 bool set_page_writeback(struct page *page)
  76 {
  77         return folio_start_writeback(page_folio(page));
  78 }
  79 EXPORT_SYMBOL(set_page_writeback);
  80
  81 bool set_page_dirty(struct page *page)
  82 {
  83         return folio_mark_dirty(page_folio(page));
  84 }
  85 EXPORT_SYMBOL(set_page_dirty);
  86
  87 int __set_page_dirty_nobuffers(struct page *page)
  88 {
  89         return filemap_dirty_folio(page_mapping(page), page_folio(page));
  90 }
  91 EXPORT_SYMBOL(__set_page_dirty_nobuffers);
  92
  93 bool clear_page_dirty_for_io(struct page *page)
  94 {
  95         return folio_clear_dirty_for_io(page_folio(page));
  96 }
  97 EXPORT_SYMBOL(clear_page_dirty_for_io);
  98
  99 bool redirty_page_for_writepage(struct writeback_control *wbc,
 100                 struct page *page)
 101 {
 102         return folio_redirty_for_writepage(wbc, page_folio(page));
 103 }
 104 EXPORT_SYMBOL(redirty_page_for_writepage);
 105
 106 void lru_cache_add(struct page *page)
 107 {
 108         folio_add_lru(page_folio(page));
 109 }
 110 EXPORT_SYMBOL(lru_cache_add);
 111
 112 int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
 113                 pgoff_t index, gfp_t gfp)
 114 {
 115         return filemap_add_folio(mapping, page_folio(page), index, gfp);
 116 }
 117 EXPORT_SYMBOL(add_to_page_cache_lru);
 118
 119 noinline
 120 struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
 121                 int fgp_flags, gfp_t gfp)
 122 {
 123         struct folio *folio;
 124
 125         folio = __filemap_get_folio(mapping, index, fgp_flags, gfp);
 126         if ((fgp_flags & FGP_HEAD) || !folio || xa_is_value(folio))
 127                 return &folio->page;
 128         return folio_file_page(folio, index);
 129 }
 130 EXPORT_SYMBOL(pagecache_get_page);
 131
 132 struct page *grab_cache_page_write_begin(struct address_space *mapping,
 133                                         pgoff_t index, unsigned flags)
 134 {
 135         unsigned fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
 136
 137         if (flags & AOP_FLAG_NOFS)
 138                 fgp_flags |= FGP_NOFS;
 139         return pagecache_get_page(mapping, index, fgp_flags,
 140                         mapping_gfp_mask(mapping));
 141 }
 142 EXPORT_SYMBOL(grab_cache_page_write_begin);
 143
 144 void delete_from_page_cache(struct page *page)
 145 {
 146         return filemap_remove_folio(page_folio(page));
 147 }
 148
 149 int try_to_release_page(struct page *page, gfp_t gfp)
 150 {
 151         return filemap_release_folio(page_folio(page), gfp);
 152 }
 153 EXPORT_SYMBOL(try_to_release_page);