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    Subject[PATCH 5.10 096/122] ARC: export clear_user_page() for modules
    Date
    From: Randy Dunlap <rdunlap@infradead.org>

    [ Upstream commit 6b5ff0405e4190f23780362ea324b250bc495683 ]

    0day bot reports a build error:
    ERROR: modpost: "clear_user_page" [drivers/media/v4l2-core/videobuf-dma-sg.ko] undefined!
    so export it in arch/arc/ to fix the build error.

    In most ARCHes, clear_user_page() is a macro. OTOH, in a few
    ARCHes it is a function and needs to be exported.
    PowerPC exported it in 2004. It looks like nds32 and nios2
    still need to have it exported.

    Fixes: 4102b53392d63 ("ARC: [mm] Aliasing VIPT dcache support 2/4")
    Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
    Reported-by: kernel test robot <lkp@intel.com>
    Cc: Guenter Roeck <linux@roeck-us.net>
    Cc: linux-snps-arc@lists.infradead.org
    Signed-off-by: Vineet Gupta <vgupta@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arc/mm/cache.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
    index a2fbea3ee07c..102418ac5ff4 100644
    --- a/arch/arc/mm/cache.c
    +++ b/arch/arc/mm/cache.c
    @@ -1123,7 +1123,7 @@ void clear_user_page(void *to, unsigned long u_vaddr, struct page *page)
    clear_page(to);
    clear_bit(PG_dc_clean, &page->flags);
    }
    -
    +EXPORT_SYMBOL(clear_user_page);

    /**********************************************************************
    * Explicit Cache flush request from user space via syscall
    --
    2.30.2


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