From: Rusty Russell <rusty@rustcorp.com.au>
Date: Sat, 25 Sep 2010 12:34:16 +0000 (+0930)
Subject: alloc: fix uninitialized entry (thanks valgrind!)
X-Git-Url: http://git.ozlabs.org/?p=ccan;a=commitdiff_plain;h=e58a81a861ab3e6593b6f4962256f45d3da781aa

alloc: fix uninitialized entry (thanks valgrind!)
---

diff --git a/ccan/alloc/alloc.c b/ccan/alloc/alloc.c
index 8e0b72aa..6cd96d8d 100644
--- a/ccan/alloc/alloc.c
+++ b/ccan/alloc/alloc.c
@@ -489,6 +489,8 @@ static unsigned long break_up_large_page(struct header *head,
 
 	for (i = 1; i < SMALL_PAGES_PER_LARGE_PAGE; i++) {
 		struct page_header *ph = from_pgnum(head, lpage + i, sp_bits);
+		/* Initialize this: huge_alloc reads it. */
+		ph->elements_used = 0;
 		add_small_page_to_freelist(head, ph, sp_bits);
 	}