s390/idle: fix suspicious RCU usage

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After commit eb1f00237a ("lockdep,trace: Expose tracepoints") the
lock tracepoints are visible to lockdep and RCU-lockdep is finding a
bunch more RCU violations that were previously hidden.

Switch the idle->seqcount over to using raw_write_*() to avoid the
lockdep annotation and thus the lock tracepoints.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

...

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Peter Zijlstra 2020-09-08 15:30:31 +02:00 • committed by Vasily Gorbik

parent 856deb866d

commit ca589ea8d1

1 changed files with 2 additions and 3 deletions

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arch/s390/kernel/idle.c

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