[Xen-devel] [PATCH v1 1/2] xen/arm: Add return value to smp_call_function_interrupt function

[Oleksandr Tyshchenko <oleksandr.tyshchenko@xxxxxxxxxxxxxxx>]

Let the function returns error if the action can not be executed.

Change-Id: Iace691850024656239326bf0e3c87b57cb1b8ab3
Signed-off-by: Oleksandr Tyshchenko <oleksandr.tyshchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@xxxxxxxxxxxxxxx>
---
 xen/common/smp.c      |    7 +++++--
 xen/include/xen/smp.h |    2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/xen/common/smp.c b/xen/common/smp.c
index 482a203..2700bd7 100644
--- a/xen/common/smp.c
+++ b/xen/common/smp.c
@@ -20,6 +20,7 @@
 #include <asm/processor.h>
 #include <xen/spinlock.h>
 #include <xen/smp.h>
+#include <xen/errno.h>
 
 /*
  * Structure and data for smp_call_function()/on_selected_cpus().
@@ -75,14 +76,14 @@ out:
     spin_unlock(&call_lock);
 }
 
-void smp_call_function_interrupt(void)
+int smp_call_function_interrupt(void)
 {
     void (*func)(void *info) = call_data.func;
     void *info = call_data.info;
     unsigned int cpu = smp_processor_id();
 
     if ( !cpumask_test_cpu(cpu, &call_data.selected) )
-        return;
+        return -EPERM;
 
     irq_enter();
 
@@ -100,6 +101,8 @@ void smp_call_function_interrupt(void)
     }
 
     irq_exit();
+
+    return 0;
 }
 
 /*
diff --git a/xen/include/xen/smp.h b/xen/include/xen/smp.h
index 6febb56..6d05910 100644
--- a/xen/include/xen/smp.h
+++ b/xen/include/xen/smp.h
@@ -61,7 +61,7 @@ static inline void on_each_cpu(
 /*
  * Call a function on the current CPU
  */
-void smp_call_function_interrupt(void);
+int smp_call_function_interrupt(void);
 
 void smp_send_call_function_mask(const cpumask_t *mask);
 
-- 
1.7.9.5


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