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  1. 26 1月, 2020 2 次提交
    • V
      ARM: 8952/1: Disable kmemleak on XIP kernels · bc420c6c
      由 Vincenzo Frascino 提交于 
      Kmemleak relies on specific symbols to register the read only data
during init (e.g. __start_ro_after_init).
Trying to build an XIP kernel on arm results in the linking error
reported below because when this option is selected read only data
after init are not allowed since .data is read only (.rodata).

  arm-linux-gnueabihf-ld: mm/kmemleak.o: in function `kmemleak_init':
  kmemleak.c:(.init.text+0x148): undefined reference to `__end_ro_after_init'
  arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x14c):
     undefined reference to `__end_ro_after_init'
  arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x150):
     undefined reference to `__start_ro_after_init'
  arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x156):
     undefined reference to `__start_ro_after_init'
  arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x162):
     undefined reference to `__start_ro_after_init'
  arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x16a):
     undefined reference to `__start_ro_after_init'
  linux/Makefile:1078: recipe for target 'vmlinux' failed

Fix the issue enabling kmemleak only on non XIP kernels.
Signed-off-by: NVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
      bc420c6c
    • V
      ARM: 8951/1: Fix Kexec compilation issue. · 76950f71
      由 Vincenzo Frascino 提交于 
      To perform the reserve_crashkernel() operation kexec uses SECTION_SIZE to
find a memblock in a range.
SECTION_SIZE is not defined for nommu systems. Trying to compile kexec in
these conditions results in a build error:

  linux/arch/arm/kernel/setup.c: In function ‘reserve_crashkernel’:
  linux/arch/arm/kernel/setup.c:1016:25: error: ‘SECTION_SIZE’ undeclared
     (first use in this function); did you mean ‘SECTIONS_WIDTH’?
             crash_size, SECTION_SIZE);
                         ^~~~~~~~~~~~
                         SECTIONS_WIDTH
  linux/arch/arm/kernel/setup.c:1016:25: note: each undeclared identifier
     is reported only once for each function it appears in
  linux/scripts/Makefile.build:265: recipe for target 'arch/arm/kernel/setup.o'
     failed

Make KEXEC depend on MMU to fix the compilation issue.
Signed-off-by: NVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
      76950f71
  3. 25 11月, 2019 1 次提交
  5. 11 11月, 2019 1 次提交
    • C
      dma-direct: provide mmap and get_sgtable method overrides · 34dc0ea6
      由 Christoph Hellwig 提交于 
      For dma-direct we know that the DMA address is an encoding of the
physical address that we can trivially decode.  Use that fact to
provide implementations that do not need the arch_dma_coherent_to_pfn
architecture hook.  Note that we still can only support mmap of
non-coherent memory only if the architecture provides a way to set an
uncached bit in the page tables.  This must be true for architectures
that use the generic remap helpers, but other architectures can also
manually select it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NMax Filippov <jcmvbkbc@gmail.com>
      34dc0ea6
  7. 04 11月, 2019 1 次提交
  9. 01 11月, 2019 1 次提交
  11. 25 9月, 2019 1 次提交
  13. 10 9月, 2019 2 次提交
  15. 29 8月, 2019 1 次提交
    • C
      dma-mapping: remove arch_dma_mmap_pgprot · 419e2f18
      由 Christoph Hellwig 提交于 
      arch_dma_mmap_pgprot is used for two things:

 1) to override the "normal" uncached page attributes for mapping
    memory coherent to devices that can't snoop the CPU caches
 2) to provide the special DMA_ATTR_WRITE_COMBINE semantics on older
    arm systems and some mips platforms

Replace one with the pgprot_dmacoherent macro that is already provided
by arm and much simpler to use, and lift the DMA_ATTR_WRITE_COMBINE
handling to common code with an explicit arch opt-in.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	# m68k
Acked-by: Paul Burton <paul.burton@mips.com>		# mips
      419e2f18
  17. 23 8月, 2019 1 次提交
  19. 20 8月, 2019 1 次提交
  21. 16 8月, 2019 1 次提交
  23. 14 8月, 2019 3 次提交
  25. 08 8月, 2019 1 次提交
  27. 15 7月, 2019 3 次提交
  29. 13 7月, 2019 2 次提交
  31. 03 7月, 2019 1 次提交
  33. 24 6月, 2019 2 次提交
  35. 21 6月, 2019 2 次提交
  37. 15 6月, 2019 1 次提交
    • M
      docs: kdump: convert docs to ReST and rename to *.rst · d67297ad
      由 Mauro Carvalho Chehab 提交于 
      Convert kdump documentation to ReST and add it to the
user faced manual, as the documents are mainly focused on
sysadmins that would be enabling kdump.

Note: the vmcoreinfo.rst has one very long title on one of its
sub-sections:

	PG_lru|PG_private|PG_swapcache|PG_swapbacked|PG_slab|PG_hwpoision|PG_head_mask|PAGE_BUDDY_MAPCOUNT_VALUE(~PG_buddy)|PAGE_OFFLINE_MAPCOUNT_VALUE(~PG_offline)

I opted to break this one, into two entries with the same content,
in order to make it easier to display after being parsed in html and PDF.

The conversion is actually:
  - add blank lines and identation in order to identify paragraphs;
  - fix tables markups;
  - add some lists markups;
  - mark literal blocks;
  - adjust title markups.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
      d67297ad
  39. 12 6月, 2019 1 次提交
  41. 09 6月, 2019 1 次提交
  43. 22 5月, 2019 1 次提交
  45. 15 5月, 2019 2 次提交
  47. 09 5月, 2019 1 次提交
    • R
      ARM: riscpc: replace gettimeoffset() with clocksource · a44c1d70
      由 Russell King 提交于 
      Replace the old gettimeoffset() interface (which became buggy in
several ways) with a clocksource that atomically reads the count
and status from the timer, and corrects the count as appropriate
ensuring proper resolution of time without time warping backwards.

We keep the original periodic timer non-clock event implementation
to provide the kernel with a regular source of interrupts, which
are required to keep the clocksource properly updated.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
      a44c1d70
  49. 24 4月, 2019 1 次提交
    • R
      ARM: fix function graph tracer and unwinder dependencies · 50362162
      由 Russell King 提交于 
      Naresh Kamboju recently reported that the function-graph tracer crashes
on ARM. The function-graph tracer assumes that the kernel is built with
frame pointers.

We explicitly disabled the function-graph tracer when building Thumb2,
since the Thumb2 ABI doesn't have frame pointers.

We recently changed the way the unwinder method was selected, which
seems to have made it more likely that we can end up with the function-
graph tracer enabled but without the kernel built with frame pointers.

Fix up the function graph tracer dependencies so the option is not
available when we have no possibility of having frame pointers, and
adjust the dependencies on the unwinder option to hide the non-frame
pointer unwinder options if the function-graph tracer is enabled.
Reviewed-by: NMasami Hiramatsu <mhiramat@kernel.org>
Tested-by: NMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
      50362162
  51. 23 4月, 2019 2 次提交
  53. 20 4月, 2019 2 次提交
    • L
      ARM: ixp4xx: Convert to SPARSE_IRQ · dc8ef8cd
      由 Linus Walleij 提交于 
      This localizes the <mach/irqs.h> header to the mach-ixp4xx
directory, removes NR_IRQS and switches IXP4xx over to using
SPARSE_IRQ.

This is a prerequisite for DT support.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      dc8ef8cd
    • L
      ARM: ixp4xx: Convert to MULTI_IRQ_HANDLER · 98ac0cc2
      由 Linus Walleij 提交于 
      This rewrites the IXP4xx to use MULTI_IRQ_HANDLER and
create an irqdomain for the irqchip in the platform. We
convert the timer to request the interrupt like any other
driver in the process.

We bump all IRQs to 16+offset to avoid using IRQ 0 and
set NR_IRQS to 512 (the default for most systems).
This conveniently fits with the first 16 IRQs being
pre-allocated when using SPARSE_IRQ.

This is a prerequisite for SPARSE_IRQ and DT boot.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      98ac0cc2
  55. 17 4月, 2019 1 次提交