[PATCH/RFC 2/4] iommu: iova: use __alloc_percpu_gfp() with GFP_NOWAIT in init_iova_rcaches()

[Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>]

In the future, the init_iova_rcaches will be called in atomic.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
 drivers/iommu/iova.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index b7268a1..866ad65 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -723,7 +723,9 @@ static void init_iova_rcaches(struct iova_domain *iovad)
 		rcache = &iovad->rcaches[i];
 		spin_lock_init(&rcache->lock);
 		rcache->depot_size = 0;
-		rcache->cpu_rcaches = __alloc_percpu(sizeof(*cpu_rcache), cache_line_size());
+		rcache->cpu_rcaches = __alloc_percpu_gfp(sizeof(*cpu_rcache),
+							 cache_line_size(),
+							 GFP_NOWAIT);
 		if (WARN_ON(!rcache->cpu_rcaches))
 			continue;
 		for_each_possible_cpu(cpu) {
-- 
1.9.1