From: Jens Axboe <axboe@suse.de>
Date: Sun, 2 Apr 2006 21:04:21 +0000 (+0200)
Subject: [PATCH] splice: fix shadow[] filling logic
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=53cd9ae886273d6c2b8ba4aa63d6cd6b1217b57f;p=deliverable%2Flinux.git

[PATCH] splice: fix shadow[] filling logic

Clear the entire range, and don't increment pidx or we keep filling
the same position again and again.

Thanks to KAMEZAWA Hiroyuki.

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

diff --git a/fs/splice.c b/fs/splice.c
index 6081cf7d2d1b..a555d0a83fe9 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -237,9 +237,9 @@ static int __generic_file_splice_read(struct file *in, struct inode *pipe,
 	 * fill shadow[] with pages at the right locations, so we only
 	 * have to fill holes
 	 */
-	memset(shadow, 0, i * sizeof(struct page *));
-	for (j = 0, pidx = index; j < i; pidx++, j++)
-		shadow[pages[j]->index - pidx] = pages[j];
+	memset(shadow, 0, nr_pages * sizeof(struct page *));
+	for (j = 0; j < i; j++)
+		shadow[pages[j]->index - index] = pages[j];
 
 	/*
 	 * now fill in the holes