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-rw-r--r--arch/x86/include/asm/xen/hypercall.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index 5e79ca69432..9c371e4a9fa 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -296,6 +296,8 @@ HYPERVISOR_get_debugreg(int reg)
static inline int
HYPERVISOR_update_descriptor(u64 ma, u64 desc)
{
+ if (sizeof(u64) == sizeof(long))
+ return _hypercall2(int, update_descriptor, ma, desc);
return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
}