From: Jens Axboe <axboe@suse.de>
Date: Thu, 27 Apr 2006 06:44:27 +0000 (+0200)
Subject: [PATCH] splice: switch to using page_cache_readahead()
X-Git-Tag: firefly_0821_release~35964^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=eb645a24de82496434cc81171d7f350edb327399;p=firefly-linux-kernel-4.4.55.git

[PATCH] splice: switch to using page_cache_readahead()

Avoids doing useless work, when the file is fully cached.

Signed-off-by: Jens Axboe <axboe@suse.de>
---

diff --git a/fs/splice.c b/fs/splice.c
index 447ebc0a37f3..dc205f643090 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -299,8 +299,8 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
 	 * read-ahead if this is a non-zero offset (we are likely doing small
 	 * chunk splice and the page is already there) for a single page.
 	 */
-	if (!loff || spd.nr_pages > 1)
-		do_page_cache_readahead(mapping, in, index, spd.nr_pages);
+	if (!loff || nr_pages > 1)
+		page_cache_readahead(mapping, &in->f_ra, in, index, nr_pages);
 
 	/*
 	 * Now fill in the holes: