sh: Wire up clear_user_highpage().

With the kmap_coherent() API in place, this is trivial to implement,
and lets us avoid the cache flush in certain cases.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index 3aa8b07da47d..5e69de1eacdf 100644
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -73,10 +73,16 @@ extern void copy_page_nommu(void *to, void *from);
 #if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
         (defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB))
 struct page;
+struct vm_area_struct;
 extern void clear_user_page(void *to, unsigned long address, struct page *pg);
 extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
 extern void __clear_user_page(void *to, void *orig_to);
 extern void __copy_user_page(void *to, void *from, void *orig_to);
+#ifdef CONFIG_CPU_SH4
+extern void copy_user_highpage(struct page *to, struct page *from,
+                               unsigned long vaddr, struct vm_area_struct *vma);
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+#endif
 #else
 #define clear_user_page(page, vaddr, pg)        clear_page(page)
 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)