vmap_stack.h

 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/gfp.h>
 7#include <linux/vmalloc.h>
 8#include <linux/pgtable.h>
 9#include <asm/memory.h>
10#include <asm/thread_info.h>
11
12/*
13 * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd
14 * stacks need to have the same alignment.
15 */
16static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
17{
18	void *p;
19
20	p = __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node,
21			__builtin_return_address(0));
22	return kasan_reset_tag(p);
23}
24
25#endif /* __ASM_VMAP_STACK_H */