fork: use __vmalloc_node() for stack allocation

Replace __vmalloc_node_range() by __vmalloc_node().  The last variant
requires less parameters and it uses exactly the same arguments which are
partly now hidden inside __vmalloc_node().

This change does not change any functionality.  It makes the code a bit
simpler.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Uladzislau Rezki (Sony) <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Tejun Heo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: urezki

kernel/fork.c

@@ -311,11 +311,9 @@ static int alloc_thread_stack_node(struct task_struct *tsk, int node)
 	 * so memcg accounting is performed manually on assigning/releasing
 	 * stacks to tasks. Drop __GFP_ACCOUNT.
 	 */
-	stack = __vmalloc_node_range(THREAD_SIZE, THREAD_ALIGN,
-				     VMALLOC_START, VMALLOC_END,
+	stack = __vmalloc_node(THREAD_SIZE, THREAD_ALIGN,
 				     THREADINFO_GFP & ~__GFP_ACCOUNT,
-				     PAGE_KERNEL,
-				     0, node, __builtin_return_address(0));
+				     node, __builtin_return_address(0));
 	if (!stack)
 		return -ENOMEM;