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Commit e3f46243 authored by Greentime Hu's avatar Greentime Hu
Browse files

nds32: Fix the symbols undefined issue by exporting them. 



It broke the 'allmodconfig' build.
  LD      vmlinux
  SYSMAP  System.map
  Building modules, stage 2.
  MODPOST 5028 modules
ERROR: "flush_dcache_page" [net/sunrpc/xprtrdma/rpcrdma.ko] undefined!
ERROR: "empty_zero_page" [net/ceph/libceph.ko] undefined!
ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined!
ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined!
ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined!
...

Signed-off-by: default avatarGreentime Hu <greentime@andestech.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 03969d0b

arch/nds32/include/asm/Kbuild

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/nds32/include/asm/page.h

+3 −0
Original line number Diff line number Diff line
@@ -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

arch/nds32/kernel/stacktrace.c

+2 −0
Original line number Diff line number Diff line
@@ -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);

arch/nds32/lib/copy_page.S

+3 −0
Original line number Diff line number Diff line
@@ -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)

arch/nds32/mm/cacheflush.c

+22 −0
Original line number Diff line number Diff line
@@ -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)

{