From: Randy Dunlap rdunlap@infradead.org
stable inclusion from stable-5.10.68 commit f5176a0798bd286a1fb2061a28f136fe1fdb0cc2 bugzilla: 182671 https://gitee.com/openeuler/kernel/issues/I4EWUH
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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 Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- 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