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/rmap.h>
  10 #include <linux/swap.h>
  11 #include "internal.h"
  12
  13 struct address_space *page_mapping(struct page *page)
  14 {
  15         return folio_mapping(page_folio(page));
  16 }
  17 EXPORT_SYMBOL(page_mapping);
  18
  19 void unlock_page(struct page *page)
  20 {
  21         return folio_unlock(page_folio(page));
  22 }
  23 EXPORT_SYMBOL(unlock_page);
  24
  25 void end_page_writeback(struct page *page)
  26 {
  27         return folio_end_writeback(page_folio(page));
  28 }
  29 EXPORT_SYMBOL(end_page_writeback);
  30
  31 void wait_on_page_writeback(struct page *page)
  32 {
  33         return folio_wait_writeback(page_folio(page));
  34 }
  35 EXPORT_SYMBOL_GPL(wait_on_page_writeback);
  36
  37 void wait_for_stable_page(struct page *page)
  38 {
  39         return folio_wait_stable(page_folio(page));
  40 }
  41 EXPORT_SYMBOL_GPL(wait_for_stable_page);
  42
  43 void mark_page_accessed(struct page *page)
  44 {
  45         folio_mark_accessed(page_folio(page));
  46 }
  47 EXPORT_SYMBOL(mark_page_accessed);
  48
  49 bool set_page_writeback(struct page *page)
  50 {
  51         return folio_start_writeback(page_folio(page));
  52 }
  53 EXPORT_SYMBOL(set_page_writeback);
  54
  55 bool set_page_dirty(struct page *page)
  56 {
  57         return folio_mark_dirty(page_folio(page));
  58 }
  59 EXPORT_SYMBOL(set_page_dirty);
  60
  61 int __set_page_dirty_nobuffers(struct page *page)
  62 {
  63         return filemap_dirty_folio(page_mapping(page), page_folio(page));
  64 }
  65 EXPORT_SYMBOL(__set_page_dirty_nobuffers);
  66
  67 bool clear_page_dirty_for_io(struct page *page)
  68 {
  69         return folio_clear_dirty_for_io(page_folio(page));
  70 }
  71 EXPORT_SYMBOL(clear_page_dirty_for_io);
  72
  73 bool redirty_page_for_writepage(struct writeback_control *wbc,
  74                 struct page *page)
  75 {
  76         return folio_redirty_for_writepage(wbc, page_folio(page));
  77 }
  78 EXPORT_SYMBOL(redirty_page_for_writepage);
  79
  80 void lru_cache_add_inactive_or_unevictable(struct page *page,
  81                 struct vm_area_struct *vma)
  82 {
  83         folio_add_lru_vma(page_folio(page), vma);
  84 }
  85
  86 int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
  87                 pgoff_t index, gfp_t gfp)
  88 {
  89         return filemap_add_folio(mapping, page_folio(page), index, gfp);
  90 }
  91 EXPORT_SYMBOL(add_to_page_cache_lru);
  92
  93 noinline
  94 struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
  95                 int fgp_flags, gfp_t gfp)
  96 {
  97         struct folio *folio;
  98
  99         folio = __filemap_get_folio(mapping, index, fgp_flags, gfp);
 100         if (!folio || xa_is_value(folio))
 101                 return &folio->page;
 102         return folio_file_page(folio, index);
 103 }
 104 EXPORT_SYMBOL(pagecache_get_page);
 105
 106 struct page *grab_cache_page_write_begin(struct address_space *mapping,
 107                                         pgoff_t index)
 108 {
 109         unsigned fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
 110
 111         return pagecache_get_page(mapping, index, fgp_flags,
 112                         mapping_gfp_mask(mapping));
 113 }
 114 EXPORT_SYMBOL(grab_cache_page_write_begin);
 115
 116 bool isolate_lru_page(struct page *page)
 117 {
 118         if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
 119                 return false;
 120         return folio_isolate_lru((struct folio *)page);
 121 }
 122
 123 void putback_lru_page(struct page *page)
 124 {
 125         folio_putback_lru(page_folio(page));
 126 }
 127
 128 #ifdef CONFIG_MMU
 129 void page_add_new_anon_rmap(struct page *page, struct vm_area_struct *vma,
 130                 unsigned long address)
 131 {
 132         VM_BUG_ON_PAGE(PageTail(page), page);
 133
 134         return folio_add_new_anon_rmap((struct folio *)page, vma, address);
 135 }
 136 #endif