From d1af65d13f3625543916a85c86d02826df910fcf Mon Sep 17 00:00:00 2001
From: David Miller <davem@davemloft.net>
Date: Wed, 28 Feb 2007 20:13:13 -0800
Subject: [PATCH] [PATCH] Bug in MM_RB debugging
The code is seemingly trying to make sure that rb_next() brings us to
successive increasing vma entries.
But the two variables, prev and pend, used to perform these checks, are
never advanced.
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Andrea Arcangeli <andrea@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/mmap.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/mmap.c b/mm/mmap.c
index eb509ae76553..84f997da78d7 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -299,6 +299,8 @@ static int browse_rb(struct rb_root *root)
printk("vm_end %lx < vm_start %lx\n", vma->vm_end, vma->vm_start);
i++;
pn = nd;
+ prev = vma->vm_start;
+ pend = vma->vm_end;
}
j = 0;
for (nd = pn; nd; nd = rb_prev(nd)) {