From: David Miller <davem@davemloft.net>
Date: Tue, 15 May 2007 08:37:56 +0000 (-0700)
Subject: [PATCH] SPARC64: Add missing cpus_empty() check in hypervisor xcall handling.
X-Git-Tag: v2.6.21.2~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38112b91c85831aa199174b9f52d6f90fe37307a;p=thirdparty%2Fkernel%2Fstable.git

[PATCH] SPARC64: Add missing cpus_empty() check in hypervisor xcall handling.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index fc99f7b8012f4..8ad7bdb062d44 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -566,6 +566,9 @@ static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t
 	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.