filemap: Use folio_put_refs() in filemap_free_folio()
authorMatthew Wilcox (Oracle) <willy@infradead.org>
Fri, 7 Jan 2022 18:03:48 +0000 (13:03 -0500)
committerMatthew Wilcox (Oracle) <willy@infradead.org>
Mon, 17 Jan 2022 00:52:13 +0000 (19:52 -0500)
commit3abb28e275bfbe60136db37eae6679c3e1928cd5
treeadf821b3c695ef24657260198778ec956a7e4c63
parent3fe7fa5843d204e235d92902190fecb972a3f9cc
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>
mm/filemap.c