[kpatch] [PATCHv3 2/3] kernel: add support for live patching
Jiri Kosina
jkosina at suse.cz
Fri Nov 21 15:27:57 UTC 2014
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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