[GIT PULL] s390 fixes for 6.17-rc6

[Alexander Gordeev]

Hi Linus,

please pull s390 fixes for 6.17-rc6.

Thanks,
Alexander

The following changes since commit 3868f910440c47cd5d158776be4ba4e2186beda7:

  s390/hypfs: Enable limited access during lockdown (2025-08-21 17:46:14 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-6.17-4

for you to fetch changes up to ce971233242b5391d99442271f3ca096fb49818d:

  s390/cpum_cf: Deny all sampling events by counter PMU (2025-08-28 16:47:58 +0200)

----------------------------------------------------------------
s390 fixes for 6.17-rc6

- ptep_modify_prot_start() may be called in a loop, which might lead
  to the preempt_count overflow due to the unnecessary preemption
  disabling. Do not disable preemption to prevent the overflow

- Events of type PERF_TYPE_HARDWARE are not tested for sampling and
  return -EOPNOTSUPP eventually. Instead, deny all sampling events by
  CPUMF counter facility and return -ENOENT to allow other PMUs to be
  tried

- The PAI PMU driver returns -EINVAL if an event out of its range.
  That aborts a search for an alternative PMU driver. Instead, return
  -ENOENT to allow other PMUs to be tried

----------------------------------------------------------------
Gerald Schaefer (1):
      s390/mm: Prevent possible preempt_count overflow

Thomas Richter (2):
      s390/pai: Deny all events not handled by this PMU
      s390/cpum_cf: Deny all sampling events by counter PMU

 arch/s390/kernel/perf_cpum_cf.c    | 4 ++--
 arch/s390/kernel/perf_pai_crypto.c | 4 ++--
 arch/s390/kernel/perf_pai_ext.c    | 2 +-
 arch/s390/mm/pgtable.c             | 2 --
 4 files changed, 5 insertions(+), 7 deletions(-)