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authorMatthew Wilcox (Oracle) <willy@infradead.org>2022-01-07 13:03:48 -0500
committerMatthew Wilcox (Oracle) <willy@infradead.org>2022-01-16 19:52:13 -0500
commit3abb28e275bfbe60136db37eae6679c3e1928cd5 (patch)
treeadf821b3c695ef24657260198778ec956a7e4c63
parent3fe7fa5843d204e235d92902190fecb972a3f9cc (diff)
filemap: Use folio_put_refs() in filemap_free_folio()
This shrinks filemap_free_folio() by 55 bytes in my .config; 24 bytes from removing the VM_BUG_ON_FOLIO() and 31 bytes from unifying the small/large folio paths. We could just use folio_ref_sub() here since the caller should hold a reference (as the VM_BUG_ON_FOLIO() was asserting), but that's fragile. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
-rw-r--r--mm/filemap.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 2fd9b2f24025..afc8f5ca85ac 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -231,17 +231,15 @@ void __filemap_remove_folio(struct folio *folio, void *shadow)
void filemap_free_folio(struct address_space *mapping, struct folio *folio)
{
void (*freepage)(struct page *);
+ int refs = 1;
freepage = mapping->a_ops->freepage;
if (freepage)
freepage(&folio->page);
- if (folio_test_large(folio) && !folio_test_hugetlb(folio)) {
- folio_ref_sub(folio, folio_nr_pages(folio));
- VM_BUG_ON_FOLIO(folio_ref_count(folio) <= 0, folio);
- } else {
- folio_put(folio);
- }
+ if (folio_test_large(folio) && !folio_test_hugetlb(folio))
+ refs = folio_nr_pages(folio);
+ folio_put_refs(folio, refs);
}
/**