[PATCH v3 06/11] readahead: round up file_ra_state->ra_pages to mapping_min_nrpages

["Pankaj Raghav (Samsung)" <kernel@pankajraghav.com>]

From: Luis Chamberlain <mcgrof@kernel.org>

As we will be adding multiples of mapping_min_nrpages to the page cache,
initialize file_ra_state->ra_pages with bdi->ra_pages rounded up to the
nearest mapping_min_nrpages.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
---
 mm/readahead.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 650834c033f0..50194fddecf1 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -138,7 +138,8 @@
 void
 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping)
 {
-	ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages;
+	ra->ra_pages = round_up(inode_to_bdi(mapping->host)->ra_pages,
+				mapping_min_folio_nrpages(mapping));
 	ra->prev_pos = -1;
 }
 EXPORT_SYMBOL_GPL(file_ra_state_init);
-- 
2.43.0