[PATCH] sh: add copy_user_page() alias for __copy_user()

copy_user_page() is needed by DAX.  Without this we get a compile error
for DAX on SH:

fs/dax.c:280:2: error: implicit declaration of function ‘copy_user_page’
[-Werror=implicit-function-declaration]
  copy_user_page(vto, (void __force *)vfrom, vaddr, to);
    ^

This was done with a random config that happened to include DAX support.

This patch has only been compile tested.

Signed-off-by: Ross Zwisler <redacted>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
Apologies for the resend, I wanted to add some more recipients.
---
 arch/sh/include/asm/page.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index fe20d14..ceb5201 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h

@@ -59,6 +59,7 @@ pages_do_alias(unsigned long addr1, unsigned long addr2)
 
 #define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
 extern void copy_page(void *to, void *from);
+#define copy_user_page(to, from, vaddr, pg)  __copy_user(to, from, PAGE_SIZE)
 
 struct page;
 struct vm_area_struct;

-- 
2.1.0