From ce4ded58d4b5869153cf5fde839161dff974cf94 Mon Sep 17 00:00:00 2001
From: Xi Wang <xi.wang@gmail.com>
Date: Thu, 16 Feb 2012 11:56:29 -0500
Subject: [PATCH] ceph: fix overflow check in build_snap_context()

commit 80834312a4da1405a9bc788313c67643de6fcb4c upstream.

The overflow check for a + n * b should be (n > (ULONG_MAX - a) / b),
rather than (n > ULONG_MAX / b - a).

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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Reading git-format-patch failed