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 void *p;
21
22 BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK));
23
24 p = __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node,
25 __builtin_return_address(0));
26 return kasan_reset_tag(p);
27 }
28
29 #endif /* __ASM_VMAP_STACK_H */
30
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