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  1. 09 Feb, 2021 7 commits
  3. 08 Feb, 2021 1 commit
  5. 07 Feb, 2021 9 commits
    • Linus Torvalds's avatar
      Linux 5.11-rc7 · 92bf2261
      Linus Torvalds authored
      92bf2261
    • Linus Torvalds's avatar
      Merge tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · b75dba7f
      Linus Torvalds authored 
      Pull libnvdimm fixes from Dan Williams:
 "A fix for a crash scenario that has been present since the initial
  merge, a minor regression in sysfs attribute visibility, and a fix for
  some flexible array warnings.

  The bulk of this pull is an update to the libnvdimm unit test
  infrastructure to test non-ACPI platforms. Given there is zero
  regression risk for test updates, and the tests enable validation of
  bits headed towards the next merge window, I saw no reason to hold the
  new tests back. Santosh originally submitted this before the v5.11
  window opened.

  Summary:

   - Fix a crash when sysfs accesses race 'dimm' driver probe/remove.

   - Fix a regression in 'resource' attribute visibility necessary for
     mapping badblocks and other physical address interrogations.

   - Fix some flexible array warnings

   - Expand the unit test infrastructure for non-ACPI platforms"

* tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm/dimm: Avoid race between probe and available_slots_show()
  ndtest: Add papr health related flags
  ndtest: Add nvdimm control functions
  ndtest: Add regions and mappings to the test buses
  ndtest: Add dimm attributes
  ndtest: Add dimms to the two buses
  ndtest: Add compatability string to treat it as PAPR family
  testing/nvdimm: Add test module for non-nfit platforms
  libnvdimm/namespace: Fix visibility of namespace resource attribute
  libnvdimm/pmem: Remove unused header
  ACPI: NFIT: Fix flexible_array.cocci warnings
      b75dba7f
    • Linus Torvalds's avatar
      Merge tag 'dma-mapping-5.11-2' of git://git.infradead.org/users/hch/dma-mapping · ff92acb2
      Linus Torvalds authored 
      Pull dma-mapping fix from Christoph Hellwig:
 "Fix a 32 vs 64-bit padding issue in the new benchmark code (Barry
  Song)"

* tag 'dma-mapping-5.11-2' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: benchmark: use u8 for reserved field in uAPI structure
      ff92acb2
    • Linus Torvalds's avatar
      Merge tag 'irq_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · fc6c0ae5
      Linus Torvalds authored 
      Pull irq fixes from Borislav Petkov:

 - Prevent device managed IRQ allocation helpers from returning IRQ 0

 - A fix for MSI activation of PCI endpoints with multiple MSIs

* tag 'irq_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Prevent [devm_]irq_alloc_desc from returning irq 0
  genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set
      fc6c0ae5
    • Linus Torvalds's avatar
      Merge tag 'core_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c6792d44
      Linus Torvalds authored 
      Pull syscall entry fixes from Borislav Petkov:

 - For syscall user dispatch, separate prctl operation from syscall
   redirection range specification before the API has been made official
   in 5.11.

 - Ensure tasks using the generic syscall code do trap after returning
   from a syscall when single-stepping is requested.

* tag 'core_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  entry: Use different define for selector variable in SUD
  entry: Ensure trap after single-step on system call return
      c6792d44
    • Linus Torvalds's avatar
      Merge tag 'sched_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 6fed85df
      Linus Torvalds authored 
      Pull scheduler fix from Borislav Petkov:
 "Revert an attempt to not spread IRQ threads on isolated CPUs which has
  a bunch of problems"

* tag 'sched_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "lib: Restrict cpumask_local_spread to houskeeping CPUs"
      6fed85df
    • Linus Torvalds's avatar
      Merge tag 'timers_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 814daadb
      Linus Torvalds authored 
      Pull timer fixes from Borislav Petkov:
 "Two more timers-related fixes for v5.11:

   - Use a freezable workqueue for RTC sync because the sync can happen
     at any time and trigger suspend assertion checks in the i2c
     subsystem.

   - Correct a previous RTC validation change to check only bit 6 in
     register D because some Intel machines use bits 0-5"

* tag 'timers_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ntp: Use freezable workqueue for RTC synchronization
  rtc: mc146818: Dont test for bit 0-5 in Register D
      814daadb
    • Linus Torvalds's avatar
      Merge tag 'x86_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e24f9c5f
      Linus Torvalds authored 
      Pull x86 fixes from Borislav Petkov:
 "I hope this is the last batch of x86/urgent updates for this round:

   - Remove superfluous EFI PGD range checks which lead to those
     assertions failing with certain kernel configs and LLVM.

   - Disable setting breakpoints on facilities involved in #DB exception
     handling to avoid infinite loops.

   - Add extra serialization to non-serializing MSRs (IA32_TSC_DEADLINE
     and x2 APIC MSRs) to adhere to SDM's recommendation and avoid any
     theoretical issues.

   - Re-add the EPB MSR reading on turbostat so that it works on older
     kernels which don't have the corresponding EPB sysfs file.

   - Add Alder Lake to the list of CPUs which support split lock.

   - Fix %dr6 register handling in order to be able to set watchpoints
     with gdb again.

   - Disable CET instrumentation in the kernel so that gcc doesn't add
     ENDBR64 to kernel code and thus confuse tracing"

* tag 'x86_urgent_for_v5.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Remove EFI PGD build time checks
  x86/debug: Prevent data breakpoints on cpu_dr7
  x86/debug: Prevent data breakpoints on __per_cpu_offset
  x86/apic: Add extra serialization for non-serializing MSRs
  tools/power/turbostat: Fallback to an MSR read for EPB
  x86/split_lock: Enable the split lock feature on another Alder Lake CPU
  x86/debug: Fix DR6 handling
  x86/build: Disable CET instrumentation in the kernel
      e24f9c5f
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v5.11-2' of... · 2db138bb
      Linus Torvalds authored 
      Merge tag 'kbuild-fixes-v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Use the 'python3' command to invoke python scripts because some
   distributions do not provide the 'python' command any more.

 - Clean-up and update documents

 - Use pkg-config to search libcrypto

 - Fix duplicated debug flags

 - Ignore some more stubs in scripts/kallsyms.c

* tag 'kbuild-fixes-v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kallsyms: fix nonconverging kallsyms table with lld
  kbuild: fix duplicated flags in DEBUG_CFLAGS
  scripts/clang-tools: switch explicitly to Python 3
  kbuild: remove PYTHON variable
  Documentation/llvm: Add a section about supported architectures
  Revert "checkpatch: add check for keyword 'boolean' in Kconfig definitions"
  scripts: use pkg-config to locate libcrypto
  kconfig: mconf: fix HOSTCC call
  doc: gcc-plugins: update gcc-plugins.rst
  kbuild: simplify GCC_PLUGINS enablement in dummy-tools/gcc
  Documentation/Kbuild: Remove references to gcc-plugin.sh
  scripts: switch explicitly to Python 3
      2db138bb
  7. 06 Feb, 2021 18 commits
  9. 05 Feb, 2021 5 commits
    • Gabriel Krisman Bertazi's avatar
      entry: Use different define for selector variable in SUD · 36a6c843
      Gabriel Krisman Bertazi authored 
      Michael Kerrisk suggested that, from an API perspective, it is a bad
idea to share the PR_SYS_DISPATCH_ defines between the prctl operation
and the selector variable.

Therefore, define two new constants to be used by SUD's selector variable
and update the corresponding documentation and test cases.

While this changes the API syscall user dispatch has never been part of a
Linux release, it will show up for the first time in 5.11.
Suggested-by: default avatarMichael Kerrisk (man-pages) <mtk.manpages@gmail.com>
Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210205184321.2062251-1-krisman@collabora.com
      36a6c843
    • Gabriel Krisman Bertazi's avatar
      entry: Ensure trap after single-step on system call return · 6342adca
      Gabriel Krisman Bertazi authored 
      Commit 29915524 ("entry: Drop usage of TIF flags in the generic syscall
code") introduced a bug on architectures using the generic syscall entry
code, in which processes stopped by PTRACE_SYSCALL do not trap on syscall
return after receiving a TIF_SINGLESTEP.

The reason is that the meaning of TIF_SINGLESTEP flag is overloaded to
cause the trap after a system call is executed, but since the above commit,
the syscall call handler only checks for the SYSCALL_WORK flags on the exit
work.

Split the meaning of TIF_SINGLESTEP such that it only means single-step
mode, and create a new type of SYSCALL_WORK to request a trap immediately
after a syscall in single-step mode.  In the current implementation, the
SYSCALL_WORK flag shadows the TIF_SINGLESTEP flag for simplicity.

Update x86 to flip this bit when a tracer enables single stepping.

Fixes: 29915524 ("entry: Drop usage of TIF flags in the generic syscall code")
Suggested-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarKyle Huey <me@kylehuey.com>
Link: https://lore.kernel.org/r/87h7mtc9pr.fsf_-_@collabora.com
      6342adca
    • Thomas Gleixner's avatar
      Revert "lib: Restrict cpumask_local_spread to houskeeping CPUs" · 2452483d
      Thomas Gleixner authored 
      This reverts commit 1abdfe70.

This change is broken and not solving any problem it claims to solve.

Robin reported that cpumask_local_spread() now returns any cpu out of
cpu_possible_mask in case that NOHZ_FULL is disabled (runtime or compile
time). It can also return any offline or not-present CPU in the
housekeeping mask. Before that it was returning a CPU out of
online_cpu_mask.

While the function is racy against CPU hotplug if the caller does not
protect against it, the actual use cases are not caring much about it as
they use it mostly as hint for:

 - the user space affinity hint which is unused by the kernel
 - memory node selection which is just suboptimal
 - network queue affinity which might fail but is handled gracefully

But the occasional fail vs. hotplug is very different from returning
anything from possible_cpu_mask which can have a large amount of offline
CPUs obviously.

The changelog of the commit claims:

 "The current implementation of cpumask_local_spread() does not respect
  the isolated CPUs, i.e., even if a CPU has been isolated for Real-Time
  task, it will return it to the caller for pinning of its IRQ
  threads. Having these unwanted IRQ threads on an isolated CPU adds up
  to a latency overhead."

The only correct part of this changelog is:

 "The current implementation of cpumask_local_spread() does not respect
  the isolated CPUs."

Everything else is just disjunct from reality.
Reported-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Nitesh Narayan Lal <nitesh@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: abelits@marvell.com
Cc: davem@davemloft.net
Link: https://lore.kernel.org/r/87y2g26tnt.fsf@nanos.tec.linutronix.de
      2452483d
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 1e0d27fc
      Linus Torvalds authored 
      Merge misc fixes from Andrew Morton:
 "18 patches.

  Subsystems affected by this patch series: mm (hugetlb, compaction,
  vmalloc, shmem, memblock, pagecache, kasan, and hugetlb), mailmap,
  gcov, ubsan, and MAINTAINERS"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  MAINTAINERS/.mailmap: use my @kernel.org address
  mm: hugetlb: fix missing put_page in gather_surplus_pages()
  ubsan: implement __ubsan_handle_alignment_assumption
  kasan: make addr_has_metadata() return true for valid addresses
  kasan: add explicit preconditions to kasan_report()
  mm/filemap: add missing mem_cgroup_uncharge() to __add_to_page_cache_locked()
  mailmap: add entries for Manivannan Sadhasivam
  mailmap: fix name/email for Viresh Kumar
  memblock: do not start bottom-up allocations with kernel_end
  mm: thp: fix MADV_REMOVE deadlock on shmem THP
  init/gcov: allow CONFIG_CONSTRUCTORS on UML to fix module gcov
  mm/vmalloc: separate put pages and flush VM flags
  mm, compaction: move high_pfn to the for loop scope
  mm: migrate: do not migrate HugeTLB page whose refcount is one
  mm: hugetlb: remove VM_BUG_ON_PAGE from page_huge_active
  mm: hugetlb: fix a race between isolating and freeing page
  mm: hugetlb: fix a race between freeing and dissolving the page
  mm: hugetlbfs: fix cannot migrate the fallocated HugeTLB page
      1e0d27fc
    • Hans de Goede's avatar
      genirq: Prevent [devm_]irq_alloc_desc from returning irq 0 · 4c7bcb51
      Hans de Goede authored 
      Since commit a85a6c86 ("driver core: platform: Clarify that IRQ 0
is invalid"), having a linux-irq with number 0 will trigger a WARN()
when calling platform_get_irq*() to retrieve that linux-irq.

Since [devm_]irq_alloc_desc allocs a single irq and since irq 0 is not used
on some systems, it can return 0, triggering that WARN(). This happens
e.g. on Intel Bay Trail and Cherry Trail devices using the LPE audio engine
for HDMI audio:

 0 is an invalid IRQ number
 WARNING: CPU: 3 PID: 472 at drivers/base/platform.c:238 platform_get_irq_optional+0x108/0x180
 Modules linked in: snd_hdmi_lpe_audio(+) ...

 Call Trace:
  platform_get_irq+0x17/0x30
  hdmi_lpe_audio_probe+0x4a/0x6c0 [snd_hdmi_lpe_audio]

 ---[ end trace ceece38854223a0b ]---

Change the 'from' parameter passed to __[devm_]irq_alloc_descs() by the
[devm_]irq_alloc_desc macros from 0 to 1, so that these macros will no
longer return 0.

Fixes: a85a6c86 ("driver core: platform: Clarify that IRQ 0 is invalid")
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20201221185647.226146-1-hdegoede@redhat.com
      4c7bcb51
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