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Use pm_fatlock to protect per-filesystem rb tree used to allocate fileno

Description

Use pm_fatlock to protect per-filesystem rb tree used to allocate fileno
on the large FAT volumes. Previously, a single global mutex was used.

Tested by: pho
MFC after: 3 weeks

Details

Provenance
kibAuthored on Feb 28 2010, 5:16 PM
Parents
rGeb739c7cd569: Add assertions for FAT bitmap state.
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