2 files changed, 17 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/pgtable.h b/arch/blackfin/include/asm/pgtable.h
index b54cbddf547f..821c699c2238 100644
--- a/arch/blackfin/include/asm/pgtable.h
+++ b/arch/blackfin/include/asm/pgtable.h
@@ -98,6 +98,12 @@ extern unsigned int kobjsize(const void *objp);
 #define VMALLOC_START   0
 #define VMALLOC_END     0xffffffff
 
+/* provide a special get_unmapped_area for framebuffer mmaps of nommu */
+extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
+                                          unsigned long, unsigned long,
+                                          unsigned long);
+#define HAVE_ARCH_FB_UNMAPPED_AREA
+
 #include <asm-generic/pgtable.h>
 
 #endif                          /* _BLACKFIN_PGTABLE_H */
diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c
index 8b294a1c8069..afcef129d4e8 100644
--- a/arch/blackfin/kernel/sys_bfin.c
+++ b/arch/blackfin/kernel/sys_bfin.c
@@ -69,3 +69,14 @@ asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
 {
         return safe_dma_memcpy(dest, src, len);
 }
+
+#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE)
+#include <linux/fb.h>
+unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
+        unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+        struct fb_info *info = filp->private_data;
+        return (unsigned long)info->screen_base;
+}
+EXPORT_SYMBOL(get_fb_unmapped_area);
+#endif