diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-08-21 18:39:10 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-03 21:15:42 -0700 |
| commit | e880034cf7182aa35962bd30dfc9fa60476d56a4 (patch) | |
| tree | 55148be6aa56f0c4bf523dc7c6df26135454499c /include/linux/mm.h | |
| parent | e27ad6560e4b5993315b56d6884ca5a4652468f4 (diff) | |
mm: introduce page_mapcount_is_type()
Resolve the awkward "and add one to this opaque constant" test into a
self-documenting inline function.
Link: https://lkml.kernel.org/r/20240821173914.2270383-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 0fde51c0532f..6f6053d7ea6f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1228,8 +1228,7 @@ static inline int folio_mapcount(const struct folio *folio) if (likely(!folio_test_large(folio))) { mapcount = atomic_read(&folio->_mapcount) + 1; - /* Handle page_has_type() pages */ - if (mapcount < PAGE_MAPCOUNT_RESERVE + 1) + if (page_mapcount_is_type(mapcount)) mapcount = 0; return mapcount; } |