[PATCH] arch: configuration, deleting 'CONFIG_BUG' since always need it.

Chen Gang gang.chen at asianux.com
Thu May 23 07:19:30 EDT 2013

On 05/23/2013 06:59 PM, Arnd Bergmann wrote:
> You don't just want to avoid the code for printing the bug message and
> the invalid instruction, we also want the compiler to not emit the 
> function call or check the enum for unexpected values. The meaning of
> BUG() is really that person writing that statement was sure it cannot
> happen unless there is a bug in the kernel, which has likely already
> corrupted data. Printing a diagnostic at this point is nice if someone
> is there to look at it, but letting the kernel do further actions that
> may be undefined is not going to make things worse.

So I think neither unreachable() nor panic() are suitable for this

I guess 'CONFIG_BUG' is not belong to common features, now (and in the
future), so it is not suitable still exist in "asm-generic/bug.h", need
remove it firstly.

And then let the specific architectures to implement their own BUG(), if
they want some special features.

SO most of arches can skip this issue.

Chen Gang

Asianux Corporation

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