sh: Wire up clear_user_highpage().

[linux-2.6-omap-h63xx.git] / arch / sh / mm / pg-sh4.c

diff --git a/arch/sh/mm/pg-sh4.c b/arch/sh/mm/pg-sh4.c
index 25f5c6f6821def36b1f796a66bb969f62044daa3..ede6dd1e3701c5814a5d805510b203f76c25fd6c 100644 (file)
--- a/arch/sh/mm/pg-sh4.c
+++ b/arch/sh/mm/pg-sh4.c
@@ -9,6 +9,8 @@
 #include <linux/mm.h>
 #include <linux/mutex.h>
 #include <linux/fs.h>
+#include <linux/highmem.h>
+#include <linux/module.h>
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 
@@ -79,6 +81,27 @@ void copy_user_page(void *to, void *from, unsigned long address,
        }
 }
 
+void copy_user_highpage(struct page *to, struct page *from,
+                       unsigned long vaddr, struct vm_area_struct *vma)
+{
+       void *vfrom, *vto;
+
+       __set_bit(PG_mapped, &to->flags);
+
+       vto = kmap_atomic(to, KM_USER1);
+       vfrom = kmap_coherent(from, vaddr);
+       copy_page(vto, vfrom);
+       kunmap_coherent(vfrom);
+
+       if (((vaddr ^ (unsigned long)vto) & CACHE_ALIAS))
+               __flush_wback_region(vto, PAGE_SIZE);
+
+       kunmap_atomic(vto, KM_USER1);
+       /* Make sure this page is cleared on other CPU's too before using it */
+       smp_wmb();
+}
+EXPORT_SYMBOL(copy_user_highpage);
+
 /*
  * For SH-4, we have our own implementation for ptep_get_and_clear
  */