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staging: lustre: replace cfs_rand() with prandom_u32_max()
All occurrences of
cfs_rand() % X
are replaced with
prandom_u32_max(X)
cfs_rand() is a simple Linear Congruential PRNG. prandom_u32_max()
is at least as random, is seeded with more randomness, and uses
cpu-local state to avoid cross-cpu issues.
This is the first step is discarding the libcfs prng with
the standard linux prng.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>