- 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
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Merge tag 's390-6.17-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Alexander Gordeev:
- 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
* tag 's390-6.17-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/cpum_cf: Deny all sampling events by counter PMU
s390/pai: Deny all events not handled by this PMU
s390/mm: Prevent possible preempt_count overflow
e59a039119