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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-01-07 13:03:48 -0500 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-01-16 19:52:13 -0500 |
| commit | 3abb28e275bfbe60136db37eae6679c3e1928cd5 (patch) | |
| tree | adf821b3c695ef24657260198778ec956a7e4c63 /mm | |
| parent | 3fe7fa5843d204e235d92902190fecb972a3f9cc (diff) | |
| download | lwn-3abb28e275bfbe60136db37eae6679c3e1928cd5.tar.gz lwn-3abb28e275bfbe60136db37eae6679c3e1928cd5.zip | |
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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/filemap.c | 10 |
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); } /** |