linux-stable.git/arch/parisc, branch linux-5.11.y

parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers

2021-04-14T06:47:10+00:00

commit 4d752e5af63753ab5140fc282929b98eaa4bd12e upstream.

commit b344d6a83d01 ("parisc: add support for cmpxchg on u8 pointers")
can generate a sparse warning ("cast truncates bits from constant
value"), which has been reported several times [1] [2] [3].

The original code worked as expected, but anyway, let silence such
sparse warning as what others did [4].

[1] https://lore.kernel.org/r/202104061220.nRMBwCXw-lkp@intel.com
[2] https://lore.kernel.org/r/202012291914.T5Agcn99-lkp@intel.com
[3] https://lore.kernel.org/r/202008210829.KVwn7Xeh%25lkp@intel.com
[4] https://lore.kernel.org/r/20210315131512.133720-2-jacopo+renesas@jmondi.org
Cc: Liam Beguin 
Cc: Helge Deller 
Cc: stable@vger.kernel.org # v5.8+
Signed-off-by: Gao Xiang 
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

parisc: Enable -mlong-calls gcc option with CONFIG_COMPILE_TEST

2021-03-11T13:19:16+00:00

commit 778e45d7720d663811352943dd515b41f6849637 upstream

The kernel test robot reported multiple linkage problems like this:

    hppa64-linux-ld: init/main.o(.init.text+0x56c): cannot reach printk
    init/main.o: in function `unknown_bootoption':
    (.init.text+0x56c): relocation truncated to fit: R_PARISC_PCREL22F against
	symbol `printk' defined in .text.unlikely section in kernel/printk/printk.o

There are two ways to solve it:
a) Enable the -mlong-call compiler option (CONFIG_MLONGCALLS),
b) Add long branch stub support in 64-bit linker.

While b) is the long-term solution, this patch works around the issue by
automatically enabling the CONFIG_MLONGCALLS option when
CONFIG_COMPILE_TEST is set, which indicates that a non-production kernel
(e.g. 0-day kernel) is built.

Signed-off-by: Helge Deller 
Reported-by: kernel test robot 
Fixes: 00e35f2b0e8a ("parisc: Enable -mlong-calls gcc option by default when !CONFIG_MODULES")
Cc: stable@vger.kernel.org # v5.6+
Signed-off-by: Sudip Mukherjee 
Signed-off-by: Greg Kroah-Hartman

parisc: Bump 64-bit IRQ stack size to 64 KB

2021-03-07T11:35:55+00:00

[ Upstream commit 31680c1d1595a59e17c14ec036b192a95f8e5f4a ]

Bump 64-bit IRQ stack size to 64 KB.

I had a kernel IRQ stack overflow on the mx3210 debian buildd machine.  This patch increases the
64-bit IRQ stack size to 64 KB.  The 64-bit stack size needs to be larger than the 32-bit stack
size since registers are twice as big.

Signed-off-by: John David Anglin 
Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: Enable -mlong-calls gcc option by default when !CONFIG_MODULES

2021-01-26T19:16:21+00:00

When building a kernel without module support, the CONFIG_MLONGCALL option
needs to be enabled in order to reach symbols which are outside of a 22-bit
branch.

This patch changes the autodetection in the Kconfig script to always enable
CONFIG_MLONGCALL when modules are disabled and uses a far call to
preempt_schedule_irq() in intr_do_preempt() to reach the symbol in all cases.

Signed-off-by: Helge Deller 
Reported-by: kernel test robot 
Cc: stable@vger.kernel.org # v5.6+

parisc: Remove leftover reference to the power_tasklet

2021-01-26T18:57:26+00:00

This was removed long ago, back in:

     6e16d9409e1 ([PARISC] Convert soft power switch driver to kthread)

Signed-off-by: Davidlohr Bueso 
Signed-off-by: Helge Deller

local64.h: make mandatory

2020-12-29T23:36:49+00:00

Make  mandatory in include/asm-generic/Kbuild and
remove all arch/*/include/asm/local64.h arch-specific files since they
only #include .

This fixes build errors on arch/c6x/ and arch/nios2/ for
block/blk-iocost.c.

Build-tested on 21 of 25 arch-es.  (tools problems on the others)

Yes, we could even rename  to
 and change all #includes to use
 instead.

Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap 
Suggested-by: Christoph Hellwig 
Reviewed-by: Masahiro Yamada 
Cc: Jens Axboe 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: Peter Zijlstra 
Cc: Arnd Bergmann 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'irq-core-2020-12-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-12-24T21:50:23+00:00

Pull irq updates from Thomas Gleixner:
 "This is the second attempt after the first one failed miserably and
  got zapped to unblock the rest of the interrupt related patches.

  A treewide cleanup of interrupt descriptor (ab)use with all sorts of
  racy accesses, inefficient and disfunctional code. The goal is to
  remove the export of irq_to_desc() to prevent these things from
  creeping up again"

* tag 'irq-core-2020-12-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  genirq: Restrict export of irq_to_desc()
  xen/events: Implement irq distribution
  xen/events: Reduce irq_info:: Spurious_cnt storage size
  xen/events: Only force affinity mask for percpu interrupts
  xen/events: Use immediate affinity setting
  xen/events: Remove disfunct affinity spreading
  xen/events: Remove unused bind_evtchn_to_irq_lateeoi()
  net/mlx5: Use effective interrupt affinity
  net/mlx5: Replace irq_to_desc() abuse
  net/mlx4: Use effective interrupt affinity
  net/mlx4: Replace irq_to_desc() abuse
  PCI: mobiveil: Use irq_data_get_irq_chip_data()
  PCI: xilinx-nwl: Use irq_data_get_irq_chip_data()
  NTB/msi: Use irq_has_action()
  mfd: ab8500-debugfs: Remove the racy fiddling with irq_desc
  pinctrl: nomadik: Use irq_has_action()
  drm/i915/pmu: Replace open coded kstat_irqs() copy
  drm/i915/lpe_audio: Remove pointless irq_to_desc() usage
  s390/irq: Use irq_desc_kstat_cpu() in show_msi_interrupt()
  parisc/irq: Use irq_desc_kstat_cpu() in show_interrupts()
  ...

epoll: wire up syscall epoll_pwait2

2020-12-19T19:18:38+00:00

Split off from prev patch in the series that implements the syscall.

Link: https://lkml.kernel.org/r/20201121144401.3727659-4-willemdebruijn.kernel@gmail.com
Signed-off-by: Willem de Bruijn 
Cc: Al Viro 
Cc: Arnd Bergmann 
Cc: Matthew Wilcox (Oracle) 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'trace-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2020-12-17T21:22:17+00:00

Pull tracing updates from Steven Rostedt:
 "The major update to this release is that there's a new arch config
  option called CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS.

  Currently, only x86_64 enables it. All the ftrace callbacks now take a
  struct ftrace_regs instead of a struct pt_regs. If the architecture
  has HAVE_DYNAMIC_FTRACE_WITH_ARGS enabled, then the ftrace_regs will
  have enough information to read the arguments of the function being
  traced, as well as access to the stack pointer.

  This way, if a user (like live kernel patching) only cares about the
  arguments, then it can avoid using the heavier weight "regs" callback,
  that puts in enough information in the struct ftrace_regs to simulate
  a breakpoint exception (needed for kprobes).

  A new config option that audits the timestamps of the ftrace ring
  buffer at most every event recorded.

  Ftrace recursion protection has been cleaned up to move the protection
  to the callback itself (this saves on an extra function call for those
  callbacks).

  Perf now handles its own RCU protection and does not depend on ftrace
  to do it for it (saving on that extra function call).

  New debug option to add "recursed_functions" file to tracefs that
  lists all the places that triggered the recursion protection of the
  function tracer. This will show where things need to be fixed as
  recursion slows down the function tracer.

  The eval enum mapping updates done at boot up are now offloaded to a
  work queue, as it caused a noticeable pause on slow embedded boards.

  Various clean ups and last minute fixes"

* tag 'trace-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (33 commits)
  tracing: Offload eval map updates to a work queue
  Revert: "ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS"
  ring-buffer: Add rb_check_bpage in __rb_allocate_pages
  ring-buffer: Fix two typos in comments
  tracing: Drop unneeded assignment in ring_buffer_resize()
  tracing: Disable ftrace selftests when any tracer is running
  seq_buf: Avoid type mismatch for seq_buf_init
  ring-buffer: Fix a typo in function description
  ring-buffer: Remove obsolete rb_event_is_commit()
  ring-buffer: Add test to validate the time stamp deltas
  ftrace/documentation: Fix RST C code blocks
  tracing: Clean up after filter logic rewriting
  tracing: Remove the useless value assignment in test_create_synth_event()
  livepatch: Use the default ftrace_ops instead of REGS when ARGS is available
  ftrace/x86: Allow for arguments to be passed in to ftrace_regs by default
  ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs
  MAINTAINERS: assign ./fs/tracefs to TRACING
  tracing: Fix some typos in comments
  ftrace: Remove unused varible 'ret'
  ring-buffer: Add recording of ring buffer recursion into recursed_functions
  ...

Merge tag 'arm-soc-defconfig-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2020-12-17T00:25:03+00:00

Pull ARM SoC defconfig updates from Arnd Bergmann:
 "These are the usual defconfig updates, adding support for additional
  modules and updating some files according to changes in Kconfig.

  I also include the removal of CONFIG_BACKLIGHT_GENERIC across multiple
  architectures, after the driver was removed"

* tag 'arm-soc-defconfig-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (41 commits)
  powerpc/configs: drop unused BACKLIGHT_GENERIC option
  parisc: configs: drop unused BACKLIGHT_GENERIC option
  arm64: defconfig: drop unused BACKLIGHT_GENERIC option
  ARM: configs: drop unused BACKLIGHT_GENERIC option
  arm64: defconfig: Enable more Librem 5 hardware
  arm64: defconfig: Enable RTC_DRV_HYM8563
  arm64: defconfig: Enable USB_SERIAL_CP210X
  arm64: defconfig: Enable PHY_ROCKCHIP_INNO_DSIDPHY
  arm64: defconfig: Enable ROCKCHIP_LVDS
  arm64: defconfig: Enable ARM SCMI protocol and drivers
  ARM: multi_v7_defconfig: Enable ARM SCMI protocol and drivers
  ARM: multi_v7_defconfig: enable STM32 dfsdm audio support
  ARM: multi_v7_defconfig: enable STM32 spdifrx support
  ARM: multi_v7_defconfig: enable STUSB160X Type-C port controller support
  ARM: multi_v7_defconfig: add STM32 crypto support
  ARM: multi_v7_defconfig: enable counter subsystem and stm32 counter drivers
  ARM: multi_v7_defconfig: make Samsung Exynos EHCI driver a module
  arm64: defconfig: Enable Qualcomm PON driver
  ARM: omap2plus_defconfig: Enable TI eQEP counter driver
  ARM: multi_v7_defconfig: ti: Enable networking options for nfs boot
  ...