On Thursday 23 May 2013, Geert Uytterhoeven wrote:

quoted

-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.

quoted

So need get rid of 'CONFIG_BUG', and let it always enabled everywhere.

So please keep it.

Agreed. The one annoying property of disabling BUG() support is that it causes
a large number of build warnings since the compiler now has to assume that a lot
of code is reachable when it is normally annotate as unreachable.

When I do "randconfig" tests, I always turn on CONFIG_BUG because of this.

	Arnd