[Xen-devel] [PATCH 18/21] xen: change the limit of nr_extents to UINT_MAX >> MEMOP_EXTENT_SHIFT

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>

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>
Cc: keir@xxxxxxx
Cc: JBeulich@xxxxxxxx
---
 xen/common/memory.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xen/common/memory.c b/xen/common/memory.c
index 5bcb035..401d06c 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -540,7 +540,7 @@ long do_memory_op(unsigned long cmd, XEN_GUEST_HANDLE(void) 
arg)
             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) )
-- 
1.7.9.1


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