From: Jiri Kosina <jkosina@suse.cz>
Date: Fri, 9 Jan 2015 09:53:21 +0000 (+0100)
Subject: livepatch: handle ancient compilers with more grace
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~136^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9dfe0bed999d23ee8838d389637dd8aef83fafa;p=pandora-kernel.git

livepatch: handle ancient compilers with more grace

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 <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
---

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