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Sparse reports some new issues introduced by the kasan patches:
arch/arm64/mm/kasan_init.c:91:13: warning: no previous prototype for
'kasan_early_init' [-Wmissing-prototypes] void __init kasan_early_init(void)
^
arch/arm64/mm/kasan_init.c:91:13: warning: symbol 'kasan_early_init'
was not declared. Should it be static? [sparse]
This patch resolves the problem by adding a prototype for
kasan_early_init and marking the function as asmlinkage, since it's only
called from head.S.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
#ifndef __ASM_KASAN_H
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#define __ASM_KASAN_H
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_KASAN
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#include <linux/linkage.h>
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#include <asm/memory.h>
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/*
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* KASAN_SHADOW_START: beginning of the kernel virtual addresses.
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* KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses.
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*/
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#define KASAN_SHADOW_START (VA_START)
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#define KASAN_SHADOW_END (KASAN_SHADOW_START + (1UL << (VA_BITS - 3)))
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/*
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* This value is used to map an address to the corresponding shadow
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* address by the following formula:
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* shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET;
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*
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* (1 << 61) shadow addresses - [KASAN_SHADOW_OFFSET,KASAN_SHADOW_END]
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* cover all 64-bits of virtual addresses. So KASAN_SHADOW_OFFSET
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* should satisfy the following equation:
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* KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61)
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*/
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#define KASAN_SHADOW_OFFSET (KASAN_SHADOW_END - (1ULL << (64 - 3)))
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void kasan_init(void);
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asmlinkage void kasan_early_init(void);
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#else
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static inline void kasan_init(void) { }
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#endif
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#endif
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#endif
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