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fs: remove folio_file_mapping()

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No callers of this function remain as filesystems no longer see swapfile
pages through their normal read/write paths.

Link: https://lkml.kernel.org/r/20250217192009.437916-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-02-17 19:20:08 +00:00 committed by Andrew Morton
parent 52d671a1a3
commit 0d40cfe63a
1 changed files with 0 additions and 20 deletions
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20
include/linux/pagemap.h
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@ -535,26 +535,6 @@ static inline void filemap_nr_thps_dec(struct address_space *mapping)
struct address_space *folio_mapping(struct folio *);
struct address_space *swapcache_mapping(struct folio *);
/**
* folio_file_mapping - Find the mapping this folio belongs to.
* @folio: The folio.
*
* For folios which are in the page cache, return the mapping that this
* page belongs to. Folios in the swap cache return the mapping of the
* swap file or swap device where the data is stored. This is different
* from the mapping returned by folio_mapping(). The only reason to
* use it is if, like NFS, you return 0 from ->activate_swapfile.
*
* Do not call this for folios which aren't in the page cache or swap cache.
*/
static inline struct address_space *folio_file_mapping(struct folio *folio)
{
if (unlikely(folio_test_swapcache(folio)))
return swapcache_mapping(folio);
return folio->mapping;
}
/**
* folio_flush_mapping - Find the file mapping this folio belongs to.
* @folio: The folio.