Christopher Haster 3f31c8cba3 Fixed corner case with immediate exhaustion and lookahead==block_count ...

The previous math for determining if we scanned all of disk wasn't set
up correctly in the lfs_mount function. If lookahead == block_count
the lfs_alloc function would think we had already searched the entire
disk.

This is only an issue if we manage to exhaust a block on the first
pass after mount, since lfs_alloc_ack resets the lookahead region
into a valid state after a succesful block allocation.

2017-11-10 10:53:33 -06:00

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