1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun // Copyright (C) 2017 Arm Ltd. 3*4882a593Smuzhiyun #ifndef __ASM_VMAP_STACK_H 4*4882a593Smuzhiyun #define __ASM_VMAP_STACK_H 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #include <linux/bug.h> 7*4882a593Smuzhiyun #include <linux/gfp.h> 8*4882a593Smuzhiyun #include <linux/kconfig.h> 9*4882a593Smuzhiyun #include <linux/vmalloc.h> 10*4882a593Smuzhiyun #include <linux/pgtable.h> 11*4882a593Smuzhiyun #include <asm/memory.h> 12*4882a593Smuzhiyun #include <asm/thread_info.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* 15*4882a593Smuzhiyun * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd 16*4882a593Smuzhiyun * stacks need to have the same alignment. 17*4882a593Smuzhiyun */ arch_alloc_vmap_stack(size_t stack_size,int node)18*4882a593Smuzhiyunstatic inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node) 19*4882a593Smuzhiyun { 20*4882a593Smuzhiyun BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK)); 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun return __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node, 23*4882a593Smuzhiyun __builtin_return_address(0)); 24*4882a593Smuzhiyun } 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #endif /* __ASM_VMAP_STACK_H */ 27