[PATCH] Fix ilogb exception and errno (bug 6794)

[David Miller]

From: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Wed, 18 Apr 2012 09:09:35 -0300

> I should have mentioned that I didn't touch some files because I couldn't
> test the correction. I fixed for the machines I have a way to test (i386,
> x86_64, ppc32 and ppc64) and I should have asked for more testing.

This is absolutely never the right thing to do.

You should make every effort to make the necessary changes to ensure
that platforms other than the ones you have access to continue to
compile.