mm/mempolicy.c: use in_task() in mempolicy_slab_node()

Obsoleted in_intrrupt() include task context with disabled BH, it's better
to use in_task() instead.

Link: https://lkml.kernel.org/r/984ee771-4834-21da-801f-c15c18ddf4d1@virtuozzo.com
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/mempolicy.c

@@ -1934,7 +1934,7 @@ unsigned int mempolicy_slab_node(void)
 	struct mempolicy *policy;
 	int node = numa_mem_id();
 
-	if (in_interrupt())
+	if (!in_task())
 		return node;
 
 	policy = current->mempolicy;