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Date:   Tue, 2 Feb 2021 15:43:27 +0000
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Andrey Konovalov <andreyknvl@google.com>
Cc:     Vincenzo Frascino <vincenzo.frascino@arm.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Alexander Potapenko <glider@google.com>,
        Marco Elver <elver@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Will Deacon <will.deacon@arm.com>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Peter Collingbourne <pcc@google.com>,
        Evgenii Stepanov <eugenis@google.com>,
        Branislav Rankov <Branislav.Rankov@arm.com>,
        Kevin Brodsky <kevin.brodsky@arm.com>,
        kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 12/12] arm64: kasan: export MTE symbols for KASAN tests
Message-ID: <20210202154327.GD26895@gaia>
References: <cover.1612208222.git.andreyknvl@google.com>
 <d128216d3b0aea0b4178e11978f5dd3e8dbeb590.1612208222.git.andreyknvl@google.com>
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On Mon, Feb 01, 2021 at 08:43:36PM +0100, Andrey Konovalov wrote:
> Export mte_enable_kernel() and mte_set_report_once() to fix:
> 
> ERROR: modpost: "mte_enable_kernel" [lib/test_kasan.ko] undefined!
> ERROR: modpost: "mte_set_report_once" [lib/test_kasan.ko] undefined!
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> ---
>  arch/arm64/kernel/mte.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
> index 8b27b70e1aac..2c91bd288ea4 100644
> --- a/arch/arm64/kernel/mte.c
> +++ b/arch/arm64/kernel/mte.c
> @@ -120,6 +120,7 @@ void mte_enable_kernel_sync(void)
>  {
>  	__mte_enable_kernel("synchronous", SCTLR_ELx_TCF_SYNC);
>  }
> +EXPORT_SYMBOL(mte_enable_kernel_sync);
>  
>  void mte_enable_kernel_async(void)
>  {
> @@ -130,6 +131,7 @@ void mte_set_report_once(bool state)
>  {
>  	WRITE_ONCE(report_fault_once, state);
>  }
> +EXPORT_SYMBOL(mte_set_report_once);

With EXPORT_SYMBOL_GPL:

Acked-by: Catalin Marinas <catalin.marinas@arm.com>