vmscan: move initialisation of mapping down
authorMatthew Wilcox (Oracle) <willy@infradead.org>
Fri, 13 May 2022 03:23:03 +0000 (20:23 -0700)
committerAndrew Morton <akpm@linux-foundation.org>
Fri, 13 May 2022 14:20:15 +0000 (07:20 -0700)
commit5441d4902f969293b5bfe057e26038db1a8b342e
treef397fe979d9fead8acdfae33531e6a6f6a86a8ea
parent64daa5d818ae3430f0785206b0af13ef528cb9ef
vmscan: move initialisation of mapping down

Now that we don't interrogate the BDI for congestion, we can delay looking
up the folio's mapping until we've got further through the function,
reducing register pressure and saving a call to folio_mapping for folios
we're adding to the swap cache.

Link: https://lkml.kernel.org/r/20220504182857.4013401-13-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/vmscan.c