riastradh a7f90b2fd2 Fix races in /dev/u?random initialization and accounting.
- Push /dev/random `information-theoretic' accounting into cprng(9).
- Use percpu(9) for the per-CPU CPRNGs.
- Use atomics with correct memory barriers for lazy CPRNG creation.
- Remove /dev/random file kmem grovelling from fstat(1).
2013-07-01 15:22:00 +00:00
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