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SubjectRe: [PATCHv3 2/3] kernel: add support for live patching
On Fri, 21 Nov 2014, Josh Poimboeuf wrote:

> I think we can use "depends on HAVE_FENTRY" to accomplish this, since
> CC_USING_FENTRY gets set by the top level kernel Makefile if
> CONFIG_HAVE_FENTRY is set.

The problem is that HAVE_FENTRY is set automatically on x86_64, no matter
whether your actual compiler supports it or not.

CC_USING_FENTRY is defined if and only if the actual currently used
compiler supports it, but that can't be expressed in Kconfig.

--
Jiri Kosina
SUSE Labs


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