[Xen-devel] [PATCH 1/2] xen: allow on_selected_cpus with interrupts disabled

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Allow on_selected_cpus with interrupts disabled, use it with care.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 xen/common/smp.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/xen/common/smp.c b/xen/common/smp.c
index dcd93ad..7deb97c 100644
--- a/xen/common/smp.c
+++ b/xen/common/smp.c
@@ -33,10 +33,9 @@ void on_selected_cpus(
     int wait)
 {
     unsigned int nr_cpus;
+    unsigned long flags;
 
-    ASSERT(local_irq_is_enabled());
-
-    spin_lock(&call_lock);
+    spin_lock_irqsave(&call_lock, flags);
 
     cpumask_copy(&call_data.selected, selected);
 
@@ -54,7 +53,7 @@ void on_selected_cpus(
         cpu_relax();
 
 out:
-    spin_unlock(&call_lock);
+    spin_unlock_irqrestore(&call_lock, flags);
 }
 
 void smp_call_function_interrupt(void)
-- 
1.7.2.5


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