memset() in crypto code?

There was recently a patch to the random driver to replace memset()
because, according to the submitter, gcc sometimes optimises memset()
away which might leave data unnecessarily exposed. The solution
suggested was a function called memzero_explicit(). There was a fair
bit of discussion and the patch was accepted.

In the crypto directory of the kernel source I have:

$ grep memset *.c | wc -l
133
$

I strongly suspect some of these should be fixed.