From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 22 May 2020 14:59:42 +0000 (-0600)
Subject: mm: allow read-ahead with IOCB_NOWAIT set
X-Git-Tag: microblaze-v5.10~213^2~110^2~9
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=2e85abf053b99a6488f1b529d7aa3b8d7478adae;p=linux-2.6-microblaze.git

mm: allow read-ahead with IOCB_NOWAIT set

The read-ahead shouldn't block, so allow it to be done even if
IOCB_NOWAIT is set in the kiocb.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/mm/filemap.c b/mm/filemap.c
index f0ae9a6308cb..3378d4fca883 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2028,8 +2028,6 @@ find_page:
 
 		page = find_get_page(mapping, index);
 		if (!page) {
-			if (iocb->ki_flags & IOCB_NOWAIT)
-				goto would_block;
 			page_cache_sync_readahead(mapping,
 					ra, filp,
 					index, last_index - index);