[RFC PATCH 03/11] mm: remove filemap_nr_thps*() functions

[Zi Yan]

They are used by READ_ONLY_THP_FOR_FS and no longer needed.

Signed-off-by: Zi Yan <z...@nvidia.com>
---
 include/linux/pagemap.h | 29 -----------------------------
 mm/filemap.c            |  1 -
 mm/huge_memory.c        |  1 -
 3 files changed, 31 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index ec442af3f886..dad3f8846cdc 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -530,35 +530,6 @@ static inline size_t mapping_max_folio_size(const struct 
address_space *mapping)
        return PAGE_SIZE << mapping_max_folio_order(mapping);
 }
 
-static inline int filemap_nr_thps(const struct address_space *mapping)
-{
-#ifdef CONFIG_READ_ONLY_THP_FOR_FS
-       return atomic_read(&mapping->nr_thps);
-#else
-       return 0;
-#endif
-}
-
-static inline void filemap_nr_thps_inc(struct address_space *mapping)
-{
-#ifdef CONFIG_READ_ONLY_THP_FOR_FS
-       if (!mapping_large_folio_support(mapping))
-               atomic_inc(&mapping->nr_thps);
-#else
-       WARN_ON_ONCE(mapping_large_folio_support(mapping) == 0);
-#endif
-}
-
-static inline void filemap_nr_thps_dec(struct address_space *mapping)
-{
-#ifdef CONFIG_READ_ONLY_THP_FOR_FS
-       if (!mapping_large_folio_support(mapping))
-               atomic_dec(&mapping->nr_thps);
-#else
-       WARN_ON_ONCE(mapping_large_folio_support(mapping) == 0);
-#endif
-}
-
 struct address_space *folio_mapping(const struct folio *folio);
 
 /**
diff --git a/mm/filemap.c b/mm/filemap.c
index 2b933a1da9bd..4248e7cdecf3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -189,7 +189,6 @@ static void filemap_unaccount_folio(struct address_space 
*mapping,
                        lruvec_stat_mod_folio(folio, NR_SHMEM_THPS, -nr);
        } else if (folio_test_pmd_mappable(folio)) {
                lruvec_stat_mod_folio(folio, NR_FILE_THPS, -nr);
-               filemap_nr_thps_dec(mapping);
        }
        if (test_bit(AS_KERNEL_FILE, &folio->mapping->flags))
                mod_node_page_state(folio_pgdat(folio),
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 610a6184e92c..54b3d21e4cbb 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3832,7 +3832,6 @@ static int __folio_freeze_and_split_unmapped(struct folio 
*folio, unsigned int n
                                } else {
                                        lruvec_stat_mod_folio(folio,
                                                        NR_FILE_THPS, -nr);
-                                       filemap_nr_thps_dec(mapping);
                                }
                        }
                }
-- 
2.43.0