[PATCH 0/7] random32: Various minor cleanups

[George Spelvin]

I was looking for self-test code to emulate for lib/glob.c and, while
canvassing other code with self-tests, found some code that made me itch,
so I scratched it.

7 patches;

1/7: Mark the self-test data as __initconst
2/7: Remove excess calls to prandom_u32_state in initialization
3/7: Replace an #ifdef with a stub prandom_state_selftest()
4/7: Use <asm/unaligned.h> instead of hand-rolling it
5/7: Make prandom_u32_max efficient for powers of 2
6/7: Randomize timeout to the millisecond, not the second
7/7: Remove redundant U suffixes on integers

I have a big follow-on patch series to replace all the (many) instances
of "prandom_u32() % x" in the kernel with prandom_u32_max(x), which is
more efficient.

As of patch 5/7, "prandom_u32() & (x-1)" can also be replaced by
"prandom_u32_max(x)", but that's optional.

Patch 6/7 is dubious, and I'd like comments.  I just don't see
a reason why integer granularity would be desirable.
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