Handle errors from disabled PSI subsystem

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When CONFIG_PSI_DEFAULT_DISABLED=y, the pressure system returns
"operation not supported", rather than permission denied or not
exposing the /proc/pressure files.

Fixes: https://github.com/prometheus/node_exporter/issues/1961

Signed-off-by: Ben Kochie <superq@gmail.com>

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Ben Kochie 2021-03-01 19:44:21 +01:00

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commit 46d0a0813f

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