linux-kernel - Re: [PATCH] mm: export copy_to_kernel

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Message-ID: <CA+fCnZdHBkFYGODVc=Qc_gmrmsuXbE0vUyYnG4s7TrvG5v7E4Q@mail.gmail.com>
Date: Fri, 18 Oct 2024 17:35:49 +0200
From: Andrey Konovalov <andreyknvl@...il.com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Sabyrzhan Tasbolatov <snovitoll@...il.com>, 
	Arnd Bergmann <arnd@...db.de>, Marco Elver <elver@...gle.com>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: export copy_to_kernel_nofault

On Fri, Oct 18, 2024 at 5:11 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
>
> This symbol is now used on the kasan test module, so it needs to be
> exported.
>
> ERROR: modpost: "copy_to_kernel_nofault" [mm/kasan/kasan_test.ko] undefined!
>
> Fixes: 44749130ffb4 ("kasan: migrate copy_user_test to kunit")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  mm/maccess.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/mm/maccess.c b/mm/maccess.c
> index 3ca55ec63a6a..8f0906180a94 100644
> --- a/mm/maccess.c
> +++ b/mm/maccess.c
> @@ -82,6 +82,7 @@ long copy_to_kernel_nofault(void *dst, const void *src, size_t size)
>         pagefault_enable();
>         return -EFAULT;
>  }
> +EXPORT_SYMBOL_GPL(copy_to_kernel_nofault);
>
>  long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count)
>  {
> --
> 2.39.5
>

Reviewed-by: Andrey Konovalov <andreyknvl@...il.com>

Thank you!