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 
page_mapping(struct page * page)12 struct address_space *page_mapping(struct page *page)
13 {
14 	return folio_mapping(page_folio(page));
15 }
16 EXPORT_SYMBOL(page_mapping);
17 
unlock_page(struct page * page)18 void unlock_page(struct page *page)
19 {
20 	return folio_unlock(page_folio(page));
21 }
22 EXPORT_SYMBOL(unlock_page);
23 
end_page_writeback(struct page * page)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 
wait_on_page_writeback(struct page * page)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 
wait_for_stable_page(struct page * page)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 
page_mapped(struct page * page)42 bool page_mapped(struct page *page)
43 {
44 	return folio_mapped(page_folio(page));
45 }
46 EXPORT_SYMBOL(page_mapped);
47 
mark_page_accessed(struct page * page)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
migrate_page_move_mapping(struct address_space * mapping,struct page * newpage,struct page * page,int extra_count)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 
migrate_page_states(struct page * newpage,struct page * page)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 
migrate_page_copy(struct page * newpage,struct page * page)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 
set_page_writeback(struct page * page)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 
set_page_dirty(struct page * page)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 
__set_page_dirty_nobuffers(struct page * page)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 
clear_page_dirty_for_io(struct page * page)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 
redirty_page_for_writepage(struct writeback_control * wbc,struct page * page)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 
lru_cache_add(struct page * page)107 void lru_cache_add(struct page *page)
108 {
109 	folio_add_lru(page_folio(page));
110 }
111 EXPORT_SYMBOL(lru_cache_add);
112 
add_to_page_cache_lru(struct page * page,struct address_space * mapping,pgoff_t index,gfp_t gfp)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
pagecache_get_page(struct address_space * mapping,pgoff_t index,int fgp_flags,gfp_t gfp)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 
grab_cache_page_write_begin(struct address_space * mapping,pgoff_t index)133 struct page *grab_cache_page_write_begin(struct address_space *mapping,
134 					pgoff_t index)
135 {
136 	unsigned fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
137 
138 	return pagecache_get_page(mapping, index, fgp_flags,
139 			mapping_gfp_mask(mapping));
140 }
141 EXPORT_SYMBOL(grab_cache_page_write_begin);
142 
delete_from_page_cache(struct page * page)143 void delete_from_page_cache(struct page *page)
144 {
145 	return filemap_remove_folio(page_folio(page));
146 }
147 
try_to_release_page(struct page * page,gfp_t gfp)148 int try_to_release_page(struct page *page, gfp_t gfp)
149 {
150 	return filemap_release_folio(page_folio(page), gfp);
151 }
152 EXPORT_SYMBOL(try_to_release_page);
153 
isolate_lru_page(struct page * page)154 int isolate_lru_page(struct page *page)
155 {
156 	if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
157 		return -EBUSY;
158 	return folio_isolate_lru((struct folio *)page);
159 }
160 
putback_lru_page(struct page * page)161 void putback_lru_page(struct page *page)
162 {
163 	folio_putback_lru(page_folio(page));
164 }
165