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