s390/cpum_sf: do not register PMU if no sampling mode is authorized

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Previously, the cpum_sf PMU was registered even if there is no
sampling mode authorized.  Add a check and register cpum_sf only
at least one sampling mode is authorized.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Hendrik Brueckner 2017-05-31 15:22:19 +02:00 • committed by Martin Schwidefsky

parent 3d43b981eb

commit 9232c3c741

1 changed files with 3 additions and 0 deletions

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arch/s390/kernel/perf_cpum_sf.c

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