Pawel Jakub Dawidek d2fb9c62e2 Avoid race while synchronizing components. It is very hard to bump into,
but it is possible:
1. Read data from good component for synchronization.
2. Write data to the same area.
3. Write synchronization data, which are now stale.

Found by:	tegge (for gmirror)
2004-09-27 20:32:35 +00:00
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