percpu: make alloc_percpu() handle array types

alloc_percpu() couldn't handle array types like "int [100]" due to the
way return type was casted.  Fix it by using typeof() instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 3d9ba92b104f..519d6876590f 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -164,8 +164,8 @@ static inline void *pcpu_lpage_remapped(void *kaddr)
 
 #endif /* CONFIG_SMP */
 
-#define alloc_percpu(type)      (type *)__alloc_percpu(sizeof(type), \
-                                                       __alignof__(type))
+#define alloc_percpu(type)      \
+        (typeof(type) *)__alloc_percpu(sizeof(type), __alignof__(type))
 
 /*
  * Optional methods for optimized non-lvalue per-cpu variable access.