Do you actually need to disable this if running an older gcc? AFAICT, it
should just have no effect at all in that case, so the comment is slightly
misleading.
Also, why turn this specific warning into an error but not any of the other
warnings? Some architectures (alpha, sparc, mips, powerpc, sh) simply turn
on -Werror for architecture specific code in general, which seems very
useful. We can also make that a config option (probably arch independent)
that we turn on for defconfig files that we know build without warnings.
Unfortunately, there is a number of device drivers that have never been
warning-free, so we can't just enable -Werror for all code.
Arnd
--
