6 files changed, 32 insertions, 0 deletions

diff --git a/arch/nds32/include/asm/Kbuild b/arch/nds32/include/asm/Kbuild
index a64e87cc8b49..142e612aa639 100644
--- a/arch/nds32/include/asm/Kbuild
+++ b/arch/nds32/include/asm/Kbuild
@@ -16,6 +16,7 @@ generic-y += dma.h
 generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += exec.h
+generic-y += export.h
 generic-y += fb.h
 generic-y += fcntl.h
 generic-y += ftrace.h
diff --git a/arch/nds32/include/asm/page.h b/arch/nds32/include/asm/page.h
index e27365c097b6..947f0491c9a7 100644
--- a/arch/nds32/include/asm/page.h
+++ b/arch/nds32/include/asm/page.h
@@ -27,6 +27,9 @@ extern void copy_user_highpage(struct page *to, struct page *from,
                                unsigned long vaddr, struct vm_area_struct *vma);
 extern void clear_user_highpage(struct page *page, unsigned long vaddr);
 
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+                    struct page *to);
+void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
 #define clear_user_highpage     clear_user_highpage
 #else
diff --git a/arch/nds32/kernel/stacktrace.c b/arch/nds32/kernel/stacktrace.c
index bc70113c0e84..8b231e910ea6 100644
--- a/arch/nds32/kernel/stacktrace.c
+++ b/arch/nds32/kernel/stacktrace.c
@@ -9,6 +9,7 @@ void save_stack_trace(struct stack_trace *trace)
 {
         save_stack_trace_tsk(current, trace);
 }
+EXPORT_SYMBOL_GPL(save_stack_trace);
 
 void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
 {
@@ -45,3 +46,4 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
                 fpn = (unsigned long *)fpp;
         }
 }
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
diff --git a/arch/nds32/lib/copy_page.S b/arch/nds32/lib/copy_page.S
index 4a2ff85f17ee..f8701ed161a8 100644
--- a/arch/nds32/lib/copy_page.S
+++ b/arch/nds32/lib/copy_page.S
@@ -2,6 +2,7 @@
 // Copyright (C) 2005-2017 Andes Technology Corporation
 
 #include <linux/linkage.h>
+#include <asm/export.h>
 #include <asm/page.h>
 
         .text
@@ -16,6 +17,7 @@ ENTRY(copy_page)
         popm    $r2, $r10
         ret
 ENDPROC(copy_page)
+EXPORT_SYMBOL(copy_page)
 
 ENTRY(clear_page)
         pushm   $r1, $r9
@@ -35,3 +37,4 @@ ENTRY(clear_page)
         popm    $r1, $r9
         ret
 ENDPROC(clear_page)
+EXPORT_SYMBOL(clear_page)
diff --git a/arch/nds32/mm/cacheflush.c b/arch/nds32/mm/cacheflush.c
index bd52918d5923..ee44ad96b6ed 100644
--- a/arch/nds32/mm/cacheflush.c
+++ b/arch/nds32/mm/cacheflush.c
@@ -147,6 +147,25 @@ void flush_cache_vunmap(unsigned long start, unsigned long end)
         cpu_icache_inval_all();
 }
 
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+                    struct page *to)
+{
+        cpu_dcache_wbinval_page((unsigned long)vaddr);
+        cpu_icache_inval_page((unsigned long)vaddr);
+        copy_page(vto, vfrom);
+        cpu_dcache_wbinval_page((unsigned long)vto);
+        cpu_icache_inval_page((unsigned long)vto);
+}
+
+void clear_user_page(void *addr, unsigned long vaddr, struct page *page)
+{
+        cpu_dcache_wbinval_page((unsigned long)vaddr);
+        cpu_icache_inval_page((unsigned long)vaddr);
+        clear_page(addr);
+        cpu_dcache_wbinval_page((unsigned long)addr);
+        cpu_icache_inval_page((unsigned long)addr);
+}
+
 void copy_user_highpage(struct page *to, struct page *from,
                         unsigned long vaddr, struct vm_area_struct *vma)
 {
@@ -213,6 +232,7 @@ void flush_dcache_page(struct page *page)
                 local_irq_restore(flags);
         }
 }
+EXPORT_SYMBOL(flush_dcache_page);
 
 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
                        unsigned long vaddr, void *dst, void *src, int len)
@@ -272,6 +292,7 @@ void flush_kernel_dcache_page(struct page *page)
         cpu_dcache_wbinval_page((unsigned long)page_address(page));
         local_irq_restore(flags);
 }
+EXPORT_SYMBOL(flush_kernel_dcache_page);
 
 void flush_kernel_vmap_range(void *addr, int size)
 {
@@ -301,6 +322,7 @@ void flush_icache_range(unsigned long start, unsigned long end)
         cpu_cache_wbinval_range(start, end, 1);
         local_irq_restore(flags);
 }
+EXPORT_SYMBOL(flush_icache_range);
 
 void flush_icache_page(struct vm_area_struct *vma, struct page *page)
 {
diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c
index 93ee0160720b..c713d2ad55dc 100644
--- a/arch/nds32/mm/init.c
+++ b/arch/nds32/mm/init.c
@@ -30,6 +30,7 @@ extern unsigned long phys_initrd_size;
  * zero-initialized data and COW.
  */
 struct page *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
 
 static void __init zone_sizes_init(void)
 {