[PATCH v3 40/45] powerpc,irq: Use GFP_ATOMIC allocations in atomic context

[Srivatsa S. Bhat]

The function migrate_irqs() is called with interrupts disabled
and hence its not safe to do GFP_KERNEL allocations inside it,
because they can sleep. So change the gfp mask to GFP_ATOMIC.

Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <michael@xxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Ian Munsie <imunsie@xxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Michael Ellerman <michael@xxxxxxxxxxxxxx>
Cc: Li Zhong <zhong@xxxxxxxxxxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
---

 arch/powerpc/kernel/irq.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index ea185e0..ca39bac 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -412,7 +412,7 @@ void migrate_irqs(void)
 	cpumask_var_t mask;
 	const struct cpumask *map = cpu_online_mask;
 
-	alloc_cpumask_var(&mask, GFP_KERNEL);
+	alloc_cpumask_var(&mask, GFP_ATOMIC);
 
 	for_each_irq_desc(irq, desc) {
 		struct irq_data *data;

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