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Merge r271458:

Description

Merge r271458:

  • Provide a sleepable lock to protect against ioctl() vs ioctl() races.
  • Use the new lock to protect against simultaneous DIOCSTART and/or DIOCSTOP ioctls.

Details

Provenance
glebiusAuthored on
Parents
rS285938: Fix a typo reported by Erik Cederstrand.
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