linux-toradex.git/arch/nds32, branch v5.5

nds32: fix build failure caused by page table folding updates

2019-12-30T10:19:05+00:00

The commit 7c2763c42326 ("nds32: use pgtable-nopmd instead of
4level-fixup") missed the pmd_off_k() macro which caused the following
build error:

  CC      arch/nds32/mm/highmem.o
In file included from arch/nds32/include/asm/page.h:57,
                 from include/linux/mm_types_task.h:16,
                 from include/linux/mm_types.h:5,
                 from include/linux/mmzone.h:21,
                 from include/linux/gfp.h:6,
                 from include/linux/xarray.h:14,
                 from include/linux/radix-tree.h:18,
                 from include/linux/fs.h:15,
                 from include/linux/highmem.h:5,
                 from arch/nds32/mm/highmem.c:5:
arch/nds32/mm/highmem.c: In function 'kmap_atomic':
arch/nds32/include/asm/pgtable.h:360:44: error: passing argument 1 of 'pmd_offset' from incompatible pointer type [-Werror=incompatible-pointer-types]
 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
                                 ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
arch/nds32/include/asm/memory.h:33:29: note: in definition of macro '__phys_to_virt'
 #define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
                             ^
arch/nds32/include/asm/pgtable.h:193:55: note: in expansion of macro '__va'
 #define pmd_page_kernel(pmd)         ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
                                                       ^~~~
include/asm-generic/pgtable-nop4d.h:41:24: note: in expansion of macro 'pgd_val'
 #define p4d_val(x)    (pgd_val((x).pgd))
                        ^~~~~~~
include/asm-generic/pgtable-nopud.h:50:24: note: in expansion of macro 'p4d_val'
 #define pud_val(x)    (p4d_val((x).p4d))
                        ^~~~~~~
include/asm-generic/pgtable-nopmd.h:49:24: note: in expansion of macro 'pud_val'
 #define pmd_val(x)    (pud_val((x).pud))
                        ^~~~~~~
arch/nds32/include/asm/pgtable.h:193:60: note: in expansion of macro 'pmd_val'
 #define pmd_page_kernel(pmd)         ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
                                                            ^~~~~~~
arch/nds32/include/asm/pgtable.h:190:56: note: in expansion of macro 'pmd_page_kernel'
 #define pte_offset_kernel(dir, address)      ((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address))
                                                        ^~~~~~~~~~~~~~~
arch/nds32/mm/highmem.c:52:9: note: in expansion of macro 'pte_offset_kernel'
  ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
         ^~~~~~~~~~~~~~~~~
arch/nds32/include/asm/pgtable.h:362:33: note: in expansion of macro 'pgd_offset'
 #define pgd_offset_k(addr)      pgd_offset(&init_mm, addr)
                                 ^~~~~~~~~~
arch/nds32/include/asm/pgtable.h:198:39: note: in expansion of macro 'pgd_offset_k'
 #define pmd_off_k(address) pmd_offset(pgd_offset_k(address), address)
                                       ^~~~~~~~~~~~
arch/nds32/mm/highmem.c:52:27: note: in expansion of macro 'pmd_off_k'
  ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
                           ^~~~~~~~~
In file included from arch/nds32/include/asm/pgtable.h:7,
                 from include/linux/mm.h:99,
                 from include/linux/highmem.h:8,
                 from arch/nds32/mm/highmem.c:5:
include/asm-generic/pgtable-nopmd.h:44:42: note: expected 'pud_t *' {aka 'struct  *'} but argument is of type 'pgd_t *' {aka 'long unsigned int *'}
 static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
                                  ~~~~~~~~^~~
In file included from arch/nds32/include/asm/page.h:57,
                 from include/linux/mm_types_task.h:16,
                 from include/linux/mm_types.h:5,
                 from include/linux/mmzone.h:21,
                 from include/linux/gfp.h:6,
                 from include/linux/xarray.h:14,
                 from include/linux/radix-tree.h:18,
                 from include/linux/fs.h:15,
                 from include/linux/highmem.h:5,
                 from arch/nds32/mm/highmem.c:5:

Updating the pmd_off_k() macro to use the correct page table unfolding
fixes the issue.

Fixes: 7c2763c42326 ("nds32: use pgtable-nopmd instead of 4level-fixup")
Link: https://lore.kernel.org/lkml/201912212139.yptX8CsV%25lkp@intel.com/
Reported-by: kbuild test robot 
Signed-off-by: Mike Rapoport 
Reviewed-by: Greentime Hu 
Signed-off-by: Arnd Bergmann

asm-generic/nds32: don't redefine cacheflush primitives

2019-12-30T10:18:43+00:00

The commit c296d4dc13ae ("asm-generic: fix a compilation warning") changed
asm-generic/cachflush.h to use static inlines instead of macros and as a
result the nds32 build with CONFIG_CPU_CACHE_ALIASING=n fails:

  CC      init/main.o
In file included from arch/nds32/include/asm/cacheflush.h:43,
                 from include/linux/highmem.h:12,
                 from include/linux/pagemap.h:11,
                 from include/linux/blkdev.h:16,
                 from include/linux/blk-cgroup.h:23,
                 from include/linux/writeback.h:14,
                 from init/main.c:44:
include/asm-generic/cacheflush.h:50:20: error: static declaration of 'flush_icache_range' follows non-static declaration
 static inline void flush_icache_range(unsigned long start, unsigned long end)
                    ^~~~~~~~~~~~~~~~~~
In file included from include/linux/highmem.h:12,
                 from include/linux/pagemap.h:11,
                 from include/linux/blkdev.h:16,
                 from include/linux/blk-cgroup.h:23,
                 from include/linux/writeback.h:14,
                 from init/main.c:44:
arch/nds32/include/asm/cacheflush.h:11:6: note: previous declaration of 'flush_icache_range' was here
 void flush_icache_range(unsigned long start, unsigned long end);
      ^~~~~~~~~~~~~~~~~~

Surround the inline functions in asm-generic/cacheflush.h by ifdef's so
that architectures could override them and add the required overrides to
nds32.

Fixes: c296d4dc13ae ("asm-generic: fix a compilation warning")
Link: https://lore.kernel.org/lkml/201912212139.yptX8CsV%25lkp@intel.com/
Reported-by: kbuild test robot 
Signed-off-by: Mike Rapoport 
Reviewed-by: Greentime Hu 
Signed-off-by: Arnd Bergmann

nds32: use pgtable-nopmd instead of 4level-fixup

2019-12-05T03:44:15+00:00

nds32 has only two-level page tables and can use pgtable-nopmd and
folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h and explicit
definition of __PAGETABLE_PMD_FOLDED in nds32 with
include/asm-generic/pgtable-nopmd.h and adjust page table manipulation
macros and functions accordingly.

Link: http://lkml.kernel.org/r/1572938135-31886-8-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport 
Cc: Anatoly Pugachev 
Cc: Anton Ivanov 
Cc: Arnd Bergmann 
Cc: "David S. Miller" 
Cc: Geert Uytterhoeven 
Cc: Greentime Hu 
Cc: Greg Ungerer 
Cc: Helge Deller 
Cc: "James E.J. Bottomley" 
Cc: Jeff Dike 
Cc: "Kirill A. Shutemov" 
Cc: Mark Salter 
Cc: Matt Turner 
Cc: Michal Simek 
Cc: Peter Rosin 
Cc: Richard Weinberger 
Cc: Rolf Eike Beer 
Cc: Russell King 
Cc: Russell King 
Cc: Sam Creasey 
Cc: Vincent Chen 
Cc: Vineet Gupta 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'y2038-cleanups-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground

2019-12-01T22:00:59+00:00

Pull y2038 cleanups from Arnd Bergmann:
 "y2038 syscall implementation cleanups

  This is a series of cleanups for the y2038 work, mostly intended for
  namespace cleaning: the kernel defines the traditional time_t, timeval
  and timespec types that often lead to y2038-unsafe code. Even though
  the unsafe usage is mostly gone from the kernel, having the types and
  associated functions around means that we can still grow new users,
  and that we may be missing conversions to safe types that actually
  matter.

  There are still a number of driver specific patches needed to get the
  last users of these types removed, those have been submitted to the
  respective maintainers"

Link: https://lore.kernel.org/lkml/20191108210236.1296047-1-arnd@arndb.de/

* tag 'y2038-cleanups-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (26 commits)
  y2038: alarm: fix half-second cut-off
  y2038: ipc: fix x32 ABI breakage
  y2038: fix typo in powerpc vdso "LOPART"
  y2038: allow disabling time32 system calls
  y2038: itimer: change implementation to timespec64
  y2038: move itimer reset into itimer.c
  y2038: use compat_{get,set}_itimer on alpha
  y2038: itimer: compat handling to itimer.c
  y2038: time: avoid timespec usage in settimeofday()
  y2038: timerfd: Use timespec64 internally
  y2038: elfcore: Use __kernel_old_timeval for process times
  y2038: make ns_to_compat_timeval use __kernel_old_timeval
  y2038: socket: use __kernel_old_timespec instead of timespec
  y2038: socket: remove timespec reference in timestamping
  y2038: syscalls: change remaining timeval to __kernel_old_timeval
  y2038: rusage: use __kernel_old_timeval
  y2038: uapi: change __kernel_time_t to __kernel_old_time_t
  y2038: stat: avoid 'time_t' in 'struct stat'
  y2038: ipc: remove __kernel_time_t reference from headers
  y2038: vdso: powerpc: avoid timespec references
  ...

Merge tag 'nds32-for-linus-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux

2019-11-30T22:28:11+00:00

Pull nds32 updates from Greentime Hu:

 - code clean up

 - add a nds32 maintainer

* tag 'nds32-for-linus-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux:
  MAINTAINERS: add nds32 maintainer
  nds32: Move static keyword to the front of declaration
  nds32: Fix typo in Kconfig.cpu
  nds32: remove unneeded clean-files for DTB

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux; tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping

2019-11-28T19:16:43+00:00

Pull dma-mapping updates from Christoph Hellwig:

 - improve dma-debug scalability (Eric Dumazet)

 - tiny dma-debug cleanup (Dan Carpenter)

 - check for vmap memory in dma_map_single (Kees Cook)

 - check for dma_addr_t overflows in dma-direct when using DMA offsets
   (Nicolas Saenz Julienne)

 - switch the x86 sta2x11 SOC to use more generic DMA code (Nicolas
   Saenz Julienne)

 - fix arm-nommu dma-ranges handling (Vladimir Murzin)

 - use __initdata in CMA (Shyam Saini)

 - replace the bus dma mask with a limit (Nicolas Saenz Julienne)

 - merge the remapping helpers into the main dma-direct flow (me)

 - switch xtensa to the generic dma remap handling (me)

 - various cleanups around dma_capable (me)

 - remove unused dev arguments to various dma-noncoherent helpers (me)

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux:

* tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping: (22 commits)
  dma-mapping: treat dev->bus_dma_mask as a DMA limit
  dma-direct: exclude dma_direct_map_resource from the min_low_pfn check
  dma-direct: don't check swiotlb=force in dma_direct_map_resource
  dma-debug: clean up put_hash_bucket()
  powerpc: remove support for NULL dev in __phys_to_dma / __dma_to_phys
  dma-direct: avoid a forward declaration for phys_to_dma
  dma-direct: unify the dma_capable definitions
  dma-mapping: drop the dev argument to arch_sync_dma_for_*
  x86/PCI: sta2x11: use default DMA address translation
  dma-direct: check for overflows on 32 bit DMA addresses
  dma-debug: increase HASH_SIZE
  dma-debug: reorder struct dma_debug_entry fields
  xtensa: use the generic uncached segment support
  dma-mapping: merge the generic remapping helpers into dma-direct
  dma-direct: provide mmap and get_sgtable method overrides
  dma-direct: remove the dma_handle argument to __dma_direct_alloc_pages
  dma-direct: remove __dma_direct_free_pages
  usb: core: Remove redundant vmap checks
  kernel: dma-contiguous: mark CMA parameters __initdata/__initconst
  dma-debug: add a schedule point in debug_dma_dump_mappings()
  ...

Merge tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap

2019-11-28T18:57:12+00:00

Pull generic ioremap support from Christoph Hellwig:
 "This adds the remaining bits for an entirely generic ioremap and
  iounmap to lib/ioremap.c. To facilitate that, it cleans up the giant
  mess of weird ioremap variants we had with no users outside the arch
  code.

  For now just the three newest ports use the code, but there is more
  than a handful others that can be converted without too much work.

  Summary:

   - clean up various obsolete ioremap and iounmap variants

   - add a new generic ioremap implementation and switch csky, nds32 and
     riscv over to it"

* tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap: (21 commits)
  nds32: use generic ioremap
  csky: use generic ioremap
  csky: remove ioremap_cache
  riscv: use the generic ioremap code
  lib: provide a simple generic ioremap implementation
  sh: remove __iounmap
  nios2: remove __iounmap
  hexagon: remove __iounmap
  m68k: rename __iounmap and mark it static
  arch: rely on asm-generic/io.h for default ioremap_* definitions
  asm-generic: don't provide ioremap for CONFIG_MMU
  asm-generic: ioremap_uc should behave the same with and without MMU
  xtensa: clean up ioremap
  x86: Clean up ioremap()
  parisc: remove __ioremap
  nios2: remove __ioremap
  alpha: remove the unused __ioremap wrapper
  hexagon: clean up ioremap
  ia64: rename ioremap_nocache to ioremap_uc
  unicore32: remove ioremap_cached
  ...

nds32: Move static keyword to the front of declaration

2019-11-21T08:05:15+00:00

Move the static keyword to the front of declaration of
cpu_pmu_of_device_ids, and resolve the following compiler
warning that can be seen when building with warnings
enabled (W=1):

arch/nds32/kernel/perf_event_cpu.c:1122:1: warning:
  ‘static’ is not at beginning of declaration [-Wold-style-declaration]

Signed-off-by: Krzysztof Wilczynski 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu

nds32: Fix typo in Kconfig.cpu

2019-11-21T08:05:07+00:00

This patch fixes some spelling typo in Kconfig.cpu

Signed-off-by: Masanari Iida 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu

nds32: remove unneeded clean-files for DTB

2019-11-21T08:03:27+00:00

These patterns are cleaned-up by the top-level Makefile

Signed-off-by: Masahiro Yamada 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu