linux.git/arch/nds32/kernel, branch v4.17

nds32: Fix compiler warning, Wstringop-overflow, in vdso.c

2018-05-23T05:26:22+00:00

Getting a compiler warning, Wstringop-overflow, in
arch/nds32/kernel/vdso.c when kernel is built by gcc-8. Declaring
vdso_start and vdso_end as a pointer to fix this compiler warning.

Signed-off-by: Vincent Chen 
Reviewed-by: Greentime Hu 
Signed-off-by: Greentime Hu

nds32: To fix a cache inconsistency issue by setting correct cacheability of NTC

2018-05-23T05:26:22+00:00

The nds32 architecture will use physical memory when interrupt or
exception comes and it will use the setting of NTC0-4. The original
implementation didn't consider the DRAM start address may start from 1GB,
2GB or 3GB to cause this issue. It will write the data to DRAM if it is
running in physical address however kernel will read the data with
virtaul address through data cache. In this case, the data of DRAM is
latest.

This fix will set the correct cacheability to let kernel write/read the
latest data in cache instead of DRAM.

Signed-off-by: Greentime Hu

nds32: Fix the virtual address may map too much range by tlbop issue.

2018-05-23T05:26:21+00:00

We use tlbop to map virtual address in the first beginning, however it
may map too much if DRAM size is not that big. We have to invalidate the
mapping when the page table is created.

Signed-off-by: Greentime Hu

nds32: Fix build failed because arch_trace_hardirqs_off is changed to trace_hardirqs_off.

2018-05-23T05:26:21+00:00

It broke the 'allmodconfig' build when CONFIG_TRACE_IRQFLAGS is enabled.

Signed-off-by: Nick Chun-Ming Hu 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: Fix the symbols undefined issue by exporting them.

2018-05-23T05:26:20+00:00

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: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: To use the generic dump_stack()

2018-03-16T07:45:23+00:00

Use the generic dump_stack() instead of nds32 one because they are doing
the same thing.

Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: fix building failed if using elf toolchain.

2018-03-16T07:45:22+00:00

OUTPUT_FORMAT is not necessary here and the elf toolchain doesn't
support these formats. Since kernel should be built pass with elf
or Linux toolchain. This can be removed from vdso.ld.S

These are the built failed messages.
  VDSOL   arch/nds32/kernel/vdso/vdso.so.dbg
  /home/users/greentime/tmp/nds32le-elf-newlib-v3-upstream-b224/bin/../lib/gcc/nds32le-elf/8.0.1/../../../../nds32le-elf/bin/ld:
  target elf32-nds32le-linux not found
  collect2: error: ld returned 1 exit status
  make[1]: *** [arch/nds32/kernel/vdso/vdso.so.dbg] Error 1
  make: *** [vdso_prepare] Error 2

Signed-off-by: Greentime Hu

nds32: Build infrastructure

2018-02-22T02:44:35+00:00

This patch adds Makefile, Kconfig and vmlinux.lds.S files required for building
an nds32 kernel.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: Device tree support

2018-02-22T02:44:34+00:00

This patch adds support for device tree.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: Generic timers support

2018-02-22T02:44:34+00:00

This patch adds support for timer.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Reviewed-by: Linus Walleij 
Acked-by: Arnd Bergmann