[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 at kernel.crashing.org>
Cc: Michael Ellerman <michael at ellerman.id.au>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Ian Munsie <imunsie at au1.ibm.com>
Cc: Steven Rostedt <rostedt at goodmis.org>
Cc: Michael Ellerman <michael at ellerman.id.au>
Cc: Li Zhong <zhong at linux.vnet.ibm.com>
Cc: linuxppc-dev at lists.ozlabs.org
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat at linux.vnet.ibm.com>
---

 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;