Fix kexec reservation

Fix kexec reservation

[Bill Burns]

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Bug found and fixed by Dave Anderson.

The reservation of space for the kexec area in
kexec_reserve_area is incorrect. It specifies the
start address and size to reserve_e820_mem when
the args should be start and end.

This patch was made against the current 3.1-testing
tip. Bug also exists in unstable.

 Bill


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--- a/xen/arch/x86/setup.c	2008-01-25 13:58:56.000000000 -0500
+++ b/xen/arch/x86/setup.c	2008-05-16 15:46:14.000000000 -0400
@@ -389,7 +389,7 @@ void __init kexec_reserve_area(struct e8
 
     is_reserved = 1;
 
-    if ( !reserve_e820_ram(e820, kdump_start, kdump_size) )
+    if ( !reserve_e820_ram(e820, kdump_start, kdump_start + kdump_size) )
     {
         printk("Kdump: DISABLED (failed to reserve %luMB (%lukB) at 0x%lx)"
                "\n", kdump_size >> 20, kdump_size >> 10, kdump_start);

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