Hi all,

After merging the akpm-current tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

mm/readahead.c: In function 'page_cache_sync_ra':
mm/readahead.c:565:8: error: 'filp' undeclared (first use in this function); did you mean 'file'?
  565 |   if (!filp)
      |        ^~~~
      |        file

Caused by commit

  f65bd470e7ed ("mm/readahead: add page_cache_sync_ra and page_cache_async_ra")

interacting with commit

  09d008e3868e ("readahead: use limited read-ahead to satisfy read")

from the block tree.

I have added the following merge fix patch.

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Fri, 16 Oct 2020 15:39:09 +1100
Subject: [PATCH] mm/readahead: fix up for "readahead: use limited read-ahead to satisfy read"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 mm/readahead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index a673ec53de37..b4d162b38bd6 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -562,7 +562,7 @@ void page_cache_sync_ra(struct readahead_control *ractl,
 	 * we're congested or tight on memory.
 	 */
 	if (!ra->ra_pages || blk_cgroup_congested()) {
-		if (!filp)
+		if (!ractl->file)
 			return;
 		req_count = 1;
 		do_forced_ra = true;
-- 
2.28.0

-- 
Cheers,
Stephen Rothwell