This is a note to let you know that I've just added the patch titled
ARC: export clear_user_page() for modules
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arc-export-clear_user_page-for-modules.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5651a9cea76596a16a7b38dc6153cda355fe1f7f
Author: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Date: Mon Aug 16 14:05:33 2021 -0700
ARC: export clear_user_page() for modules
[ 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@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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
