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Today the arm64 arch code allocates an extra IRQ stack per-cpu. If we also have SDEI and VMAP stacks we need two extra per-cpu VMAP stacks. Move the VMAP stack allocation out to a helper in a new header file. This avoids missing THREADINFO_GFP, or getting the all-important alignment wrong. Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
28 lines
769 B
C
28 lines
769 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2017 Arm Ltd.
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#ifndef __ASM_VMAP_STACK_H
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#define __ASM_VMAP_STACK_H
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#include <linux/bug.h>
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#include <linux/gfp.h>
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#include <linux/kconfig.h>
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#include <linux/vmalloc.h>
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#include <asm/memory.h>
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#include <asm/pgtable.h>
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#include <asm/thread_info.h>
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/*
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* To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd
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* stacks need to have the same alignment.
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*/
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static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
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{
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BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK));
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return __vmalloc_node_range(stack_size, THREAD_ALIGN,
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VMALLOC_START, VMALLOC_END,
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THREADINFO_GFP, PAGE_KERNEL, 0, node,
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__builtin_return_address(0));
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}
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#endif /* __ASM_VMAP_STACK_H */
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