PROBLEM:        (QAR 47372)     (Patch ID: OSF375-147)
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This patch fixes the return error status on reads and writes
in LSM to make it POSIX compliant.

PROBLEM:  (QAR 63044, QAR 62998)    (Patch ID: OSF375-232)
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This patch fixes a problem in lsm. A data corruption occurs when readv/writev 
coallesced via physio while in read/writeback mode.