[patch 54/69] SPARC64: Add missing cpus_empty() check in hypervisor xcall handling.

[Chris Wright <chrisw@sous-sol.org>]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: David Miller <davem@davemloft.net>

---
 arch/sparc64/kernel/smp.c |    3 +++
 1 file changed, 3 insertions(+)

--- linux-2.6.21.1.orig/arch/sparc64/kernel/smp.c
+++ linux-2.6.21.1/arch/sparc64/kernel/smp.c
@@ -566,6 +566,9 @@ static void hypervisor_xcall_deliver(u64
 	unsigned long flags, status;
 	int cnt, retries, this_cpu, prev_sent, i;
 
+	if (cpus_empty(mask))
+		return;
+
 	/* We have to do this whole thing with interrupts fully disabled.
 	 * Otherwise if we send an xcall from interrupt context it will
 	 * corrupt both our mondo block and cpu list state.

-- 
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