On Thu, May 23, 2013 at 10:40:29AM +0200, Geert Uytterhoeven wrote: > On Thu, May 23, 2013 at 9:57 AM, Chen Gang <gang.c...@asianux.com> wrote: > > -config BUG > > - bool "BUG() support" if EXPERT > > - default y > > - help > > - Disabling this option eliminates support for BUG and WARN, > > reducing > > - the size of your kernel image and potentially quietly ignoring > > - numerous fatal conditions. You should only consider disabling > > this > > - option for embedded systems with no facilities for reporting > > errors. > > - Just say Y. > > ... It's about reducing memory size on devices where you can't show bug or > warning messages.
And turning off CONFIG_BUG causes lots of warning messages at compile time about functions which are returning nothing which shouldn't. The problem is: trying to fix that _will_ mean the result is a larger kernel than if you just do the usual arch-implemented thing of placing an defined faulting instruction at the BUG() site - which defeats the purpose of turning off CONFIG_BUG. Therefore, it's better that CONFIG_BUG always be y and we stop kidding ourselves that it's possible to turn this off and safely save space. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
