We are aborting a build in case when gcc doesn't support fentry on x86_64
(regs->ip modification can't really reliably work with mcount).
This however breaks allmodconfig for people with older gccs that don't
support -mfentry.
Turn the build-time failure into runtime failure, resulting in the whole
infrastructure not being initialized if CC_USING_FENTRY is unset.
Reported-by: Andrew Morton <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Josh Poimboeuf <[email protected]>
Jiri Kosina
b9dfe0bed9