[Xen-changelog] [xen-unstable] Do not pass DIRECTMAP_VIRT_END to virt_to_mfn(). It's out of range.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1237541649 0
# Node ID bbfcea821a0ded028c1a81101b5992cafca32f0b
# Parent  abb87a8387acbfd80a9e3475206f392db12e9c5e
Do not pass DIRECTMAP_VIRT_END to virt_to_mfn(). It's out of range.

Signed-off-by: Xiaowei Yang <xiaowei.yang@xxxxxxxxx>
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/common/page_alloc.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r abb87a8387ac -r bbfcea821a0d xen/common/page_alloc.c
--- a/xen/common/page_alloc.c   Fri Mar 20 09:10:55 2009 +0000
+++ b/xen/common/page_alloc.c   Fri Mar 20 09:34:09 2009 +0000
@@ -299,7 +299,7 @@ static unsigned long init_node_heap(int 
     }
 #ifdef DIRECTMAP_VIRT_END
     else if ( nr >= needed &&
-              mfn + needed <= virt_to_mfn(DIRECTMAP_VIRT_END) )
+              (mfn + needed) <= (virt_to_mfn(DIRECTMAP_VIRT_END - 1) + 1) )
     {
         _heap[node] = mfn_to_virt(mfn);
         avail[node] = mfn_to_virt(mfn + needed) - sizeof(**avail) * NR_ZONES;

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