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>

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 3d9ba92..519d687 100644 (file)
--- 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.