linux-kernel - [tip:WIP.x86/pti 20/70] arch/x86/mm/kasan_init_64.c:158:2: error: implicit declaration of function 'kasan_populate_shadow'; did you mean 'kasan_populate_zero

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Date:   Tue, 5 Dec 2017 23:09:22 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        tipbuild@...or.com, Ingo Molnar <mingo@...nel.org>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [tip:WIP.x86/pti 20/70] arch/x86/mm/kasan_init_64.c:158:2: error:
 implicit declaration of function 'kasan_populate_shadow'; did you mean
 'kasan_populate_zero_shadow'?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/pti
head:   16db81a1bfe0974b6ed3ed102150e23449ab0c7f
commit: ba3c7d99755557a2724d42bf728cbfe7a401539f [20/70] x86/kasan/64: Teach KASAN about the cpu_entry_area
config: x86_64-randconfig-x018-201749 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
        git checkout ba3c7d99755557a2724d42bf728cbfe7a401539f
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/mm/kasan_init_64.c: In function 'kasan_init':
>> arch/x86/mm/kasan_init_64.c:158:2: error: implicit declaration of function 'kasan_populate_shadow'; did you mean 'kasan_populate_zero_shadow'? [-Werror=implicit-function-declaration]
     kasan_populate_shadow((unsigned long)shadow_cpu_entry_begin,
     ^~~~~~~~~~~~~~~~~~~~~
     kasan_populate_zero_shadow
   Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:constant_test_bit
   Cyclomatic Complexity 2 arch/x86/include/asm/page_64.h:__phys_addr_nodebug
   Cyclomatic Complexity 1 arch/x86/include/asm/pgtable_types.h:native_pgd_val
   Cyclomatic Complexity 1 include/asm-generic/pgtable-nop4d.h:p4d_offset
   Cyclomatic Complexity 1 arch/x86/include/asm/pgtable_types.h:native_p4d_val
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:write_cr3
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:__flush_tlb
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:__flush_tlb_global
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:__pte
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:__pgd
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:set_pte
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:__pmd
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:__pud
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:set_p4d
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:p4d_clear
   Cyclomatic Complexity 1 include/linux/kasan.h:kasan_mem_to_shadow
   Cyclomatic Complexity 2 arch/x86/include/asm/tlbflush.h:__flush_tlb_all
   Cyclomatic Complexity 2 arch/x86/mm/kasan_init_64.c:clear_pgds
   Cyclomatic Complexity 2 arch/x86/mm/kasan_init_64.c:kasan_map_early_shadow
   Cyclomatic Complexity 1 arch/x86/mm/kasan_init_64.c:map_range
   Cyclomatic Complexity 1 arch/x86/include/asm/processor.h:load_cr3
   Cyclomatic Complexity 2 arch/x86/mm/kasan_init_64.c:kasan_die_handler
   Cyclomatic Complexity 4 arch/x86/mm/kasan_init_64.c:kasan_early_init
   Cyclomatic Complexity 4 arch/x86/mm/kasan_init_64.c:kasan_init
   Cyclomatic Complexity 1 arch/x86/mm/kasan_init_64.c:_GLOBAL__sub_I_00100_0_kasan_early_init
   Cyclomatic Complexity 1 arch/x86/mm/kasan_init_64.c:_GLOBAL__sub_D_00100_1_kasan_early_init
   cc1: some warnings being treated as errors

vim +158 arch/x86/mm/kasan_init_64.c

   120	
   121		memcpy(early_top_pgt, init_top_pgt, sizeof(early_top_pgt));
   122		load_cr3(early_top_pgt);
   123		__flush_tlb_all();
   124	
   125		clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END);
   126	
   127		kasan_populate_zero_shadow((void *)KASAN_SHADOW_START,
   128				kasan_mem_to_shadow((void *)PAGE_OFFSET));
   129	
   130		for (i = 0; i < E820_MAX_ENTRIES; i++) {
   131			if (pfn_mapped[i].end == 0)
   132				break;
   133	
   134			if (map_range(&pfn_mapped[i]))
   135				panic("kasan: unable to allocate shadow!");
   136		}
   137		kasan_populate_zero_shadow(
   138			kasan_mem_to_shadow((void *)PAGE_OFFSET + MAXMEM),
   139			kasan_mem_to_shadow((void *)__START_KERNEL_map));
   140	
   141		vmemmap_populate((unsigned long)kasan_mem_to_shadow(_stext),
   142				(unsigned long)kasan_mem_to_shadow(_end),
   143				NUMA_NO_NODE);
   144	
   145		shadow_cpu_entry_begin = (void *)__fix_to_virt(FIX_CPU_ENTRY_AREA_BOTTOM);
   146		shadow_cpu_entry_begin = kasan_mem_to_shadow(shadow_cpu_entry_begin);
   147		shadow_cpu_entry_begin = (void *)round_down((unsigned long)shadow_cpu_entry_begin,
   148							PAGE_SIZE);
   149	
   150		shadow_cpu_entry_end = (void *)(__fix_to_virt(FIX_CPU_ENTRY_AREA_TOP) + PAGE_SIZE);
   151		shadow_cpu_entry_end = kasan_mem_to_shadow(shadow_cpu_entry_end);
   152		shadow_cpu_entry_end = (void *)round_up((unsigned long)shadow_cpu_entry_end,
   153						PAGE_SIZE);
   154	
   155		kasan_populate_zero_shadow(kasan_mem_to_shadow((void *)MODULES_END),
   156					   shadow_cpu_entry_begin);
   157	
 > 158		kasan_populate_shadow((unsigned long)shadow_cpu_entry_begin,

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