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 #ifdef CONFIG_MIGRATION
  55 int migrate_page_move_mapping(struct address_space *mapping,
  56                 struct page *newpage, struct page *page, int extra_count)
  57 {
  58         return folio_migrate_mapping(mapping, page_folio(newpage),
  59                                         page_folio(page), extra_count);
  60 }
  61 EXPORT_SYMBOL(migrate_page_move_mapping);
  62
  63 void migrate_page_states(struct page *newpage, struct page *page)
  64 {
  65         folio_migrate_flags(page_folio(newpage), page_folio(page));
  66 }
  67 EXPORT_SYMBOL(migrate_page_states);
  68
  69 void migrate_page_copy(struct page *newpage, struct page *page)
  70 {
  71         folio_migrate_copy(page_folio(newpage), page_folio(page));
  72 }
  73 EXPORT_SYMBOL(migrate_page_copy);
  74 #endif
  75
  76 bool set_page_writeback(struct page *page)
  77 {
  78         return folio_start_writeback(page_folio(page));
  79 }
  80 EXPORT_SYMBOL(set_page_writeback);
  81
  82 bool set_page_dirty(struct page *page)
  83 {
  84         return folio_mark_dirty(page_folio(page));
  85 }
  86 EXPORT_SYMBOL(set_page_dirty);
  87
  88 int __set_page_dirty_nobuffers(struct page *page)
  89 {
  90         return filemap_dirty_folio(page_mapping(page), page_folio(page));
  91 }
  92 EXPORT_SYMBOL(__set_page_dirty_nobuffers);
  93
  94 bool clear_page_dirty_for_io(struct page *page)
  95 {
  96         return folio_clear_dirty_for_io(page_folio(page));
  97 }
  98 EXPORT_SYMBOL(clear_page_dirty_for_io);
  99
 100 bool redirty_page_for_writepage(struct writeback_control *wbc,
 101                 struct page *page)
 102 {
 103         return folio_redirty_for_writepage(wbc, page_folio(page));
 104 }
 105 EXPORT_SYMBOL(redirty_page_for_writepage);
 106
 107 void lru_cache_add(struct page *page)
 108 {
 109         folio_add_lru(page_folio(page));
 110 }
 111 EXPORT_SYMBOL(lru_cache_add);
 112
 113 int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
 114                 pgoff_t index, gfp_t gfp)
 115 {
 116         return filemap_add_folio(mapping, page_folio(page), index, gfp);
 117 }
 118 EXPORT_SYMBOL(add_to_page_cache_lru);
 119
 120 noinline
 121 struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
 122                 int fgp_flags, gfp_t gfp)
 123 {
 124         struct folio *folio;
 125
 126         folio = __filemap_get_folio(mapping, index, fgp_flags, gfp);
 127         if ((fgp_flags & FGP_HEAD) || !folio || xa_is_value(folio))
 128                 return &folio->page;
 129         return folio_file_page(folio, index);
 130 }
 131 EXPORT_SYMBOL(pagecache_get_page);
 132
 133 struct page *grab_cache_page_write_begin(struct address_space *mapping,
 134                                         pgoff_t index, unsigned flags)
 135 {
 136         unsigned fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
 137
 138         if (flags & AOP_FLAG_NOFS)
 139                 fgp_flags |= FGP_NOFS;
 140         return pagecache_get_page(mapping, index, fgp_flags,
 141                         mapping_gfp_mask(mapping));
 142 }
 143 EXPORT_SYMBOL(grab_cache_page_write_begin);
 144
 145 void delete_from_page_cache(struct page *page)
 146 {
 147         return filemap_remove_folio(page_folio(page));
 148 }
 149
 150 int try_to_release_page(struct page *page, gfp_t gfp)
 151 {
 152         return filemap_release_folio(page_folio(page), gfp);
 153 }
 154 EXPORT_SYMBOL(try_to_release_page);
 155
 156 int isolate_lru_page(struct page *page)
 157 {
 158         if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
 159                 return -EBUSY;
 160         return folio_isolate_lru((struct folio *)page);
 161 }
 162
 163 void putback_lru_page(struct page *page)
 164 {
 165         folio_putback_lru(page_folio(page));
 166 }