tree 440e0d132abdb6b1d03e9440c803c0f7e2db38fc
parent b4237003cff66084ebeb502412d9cee392e6f52f
author Tony Luck <tony.luck@intel.com> 1343062077 -0700
committer Theodore Ts'o <tytso@mit.edu> 1343150201 -0400

random: Add comment to random_initialize()

Many platforms have per-machine instance data (serial numbers,
asset tags, etc.) squirreled away in areas that are accessed
during early system bringup. Mixing this data into the random
pools has a very high value in providing better random data,
so we should allow (and even encourage) architecture code to
call add_device_randomness() from the setup_arch() paths.

However, this limits our options for internal structure of
the random driver since random_initialize() is not called
until long after setup_arch().

Add a big fat comment to rand_initialize() spelling out
this requirement.

Suggested-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>