tree ce1d56ca2e49e51d685a443ac8ea036a818e60c9
parent b224f7cb635f0a1a0a80c1dae93699a2a1161604
author Frank Sorenson <sorenson@redhat.com> 1467055039 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1468959806 -0400

sunrpc: Fix bit count when setting hashtable size to power-of-two

Author: Frank Sorenson <sorenson@redhat.com>
Date:   2016-06-27 13:55:48 -0500

    sunrpc: Fix bit count when setting hashtable size to power-of-two

    The hashtable size is incorrectly calculated as the next higher
    power-of-two when being set to a power-of-two.  fls() returns the
    bit number of the most significant set bit, with the least
    significant bit being numbered '1'.  For a power-of-two, fls()
    will return a bit number which is one higher than the number of bits
    required, leading to a hashtable which is twice the requested size.

    In addition, the value of (1 << nbits) will always be at least num,
    so the test will never be true.

    Fix the hash table size calculation to correctly set hashtable
    size, and eliminate the unnecessary check.

    Signed-off-by: Frank Sorenson <sorenson@redhat.com>

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>