1 /* SPDX-License-Identifier: GPL-2.0 */
2 // Copyright (C) 2017 Arm Ltd.
3 #ifndef __ASM_VMAP_STACK_H
4 #define __ASM_VMAP_STACK_H
5 
6 #include <linux/bug.h>
7 #include <linux/gfp.h>
8 #include <linux/kconfig.h>
9 #include <linux/vmalloc.h>
10 #include <linux/pgtable.h>
11 #include <asm/memory.h>
12 #include <asm/thread_info.h>
13 
14 /*
15  * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd
16  * stacks need to have the same alignment.
17  */
18 static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
19 {
20 	BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK));
21 
22 	return __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node,
23 			__builtin_return_address(0));
24 }
25 
26 #endif /* __ASM_VMAP_STACK_H */
27