[PATCH] Fix offset2lib issue for x86*, ARM*, PowerPC and MIPS

[Andrew Morton]

On Thu, 26 Feb 2015 15:37:37 -0800 Kees Cook <keescook at chromium.org> wrote:

> Agh, no, please let's avoid the CONFIG addition.

That is precisely how we do this.

> Hector mentioned in private mail that he was looking at an alternative
> that adds exec_base to struct mm which would avoid all this insanity.
> 
> Can't we do something like:
> 
> #ifndef mmap_rnd
> # define mmap_rnd 0
> #endif

Sure, and sprinkle

#define mmap_rnd mmap_rnd

in five arch header files where nobody thinks to look.

For better or for worse, we are consolidating such things into arch/*/Kconfig.