[Xen-changelog] [xen-unstable] xen: change the limit of nr_extents to UINT_MAX >> MEMOP_EXTENT_SHIFT

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
# Date 1350488630 -3600
# Node ID ed6c135011958a18c0392713f9a357d3281546a7
# Parent  a324eea3bbc87cdfb314ac4d09c67b58d18c3f4a
xen: change the limit of nr_extents to UINT_MAX >> MEMOP_EXTENT_SHIFT

Currently do_memory_op has a different maximum limit for nr_extents on
32 bit and 64 bit.
Change the limit to UINT_MAX >> MEMOP_EXTENT_SHIFT, so that it is the
same in both cases.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Keir Fraser <keir@xxxxxxx>
Committed-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---


diff -r a324eea3bbc8 -r ed6c13501195 xen/common/memory.c
--- a/xen/common/memory.c       Wed Oct 17 16:43:49 2012 +0100
+++ b/xen/common/memory.c       Wed Oct 17 16:43:50 2012 +0100
@@ -540,7 +540,7 @@ long do_memory_op(unsigned long cmd, XEN
             return start_extent;
 
         /* Is size too large for us to encode a continuation? */
-        if ( reservation.nr_extents > (ULONG_MAX >> MEMOP_EXTENT_SHIFT) )
+        if ( reservation.nr_extents > (UINT_MAX >> MEMOP_EXTENT_SHIFT) )
             return start_extent;
 
         if ( unlikely(start_extent >= reservation.nr_extents) )

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