Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / arch / x86 / kernel / apic / x2apic_uv_x.c

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 7f179f1c467cba9fd12125b6161689d58f7f50d6..b487b3a016153d2b5a66e0b1334fe203ed992e7e 100644 (file)
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1106,7 +1106,8 @@ void __init uv_init_hub_info(struct uv_hub_info_s *hi)
        node_id.v               = uv_read_local_mmr(UVH_NODE_ID);
        uv_cpuid.gnode_shift    = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
        hi->gnode_extra         = (node_id.s.node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
-       hi->gnode_upper         = (unsigned long)hi->gnode_extra << mn.m_val;
+       if (mn.m_val)
+               hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
 
        if (uv_gp_table) {
                hi->global_mmr_base     = uv_gp_table->mmr_base;