GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-08 23:55:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

livepatch: handle ancient compilers with more grace

Browse source 
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>
This commit is contained in:
Jiri Kosina 2015-01-09 10:53:21 +01:00
parent 83ac237a95
commit b9dfe0bed9
2 changed files with 11 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

6
kernel/livepatch/core.c
View file

@ -911,6 +911,12 @@ static int klp_init(void)
{
int ret;
ret = klp_check_compiler_support();
if (ret) {
pr_info("Your compiler is too old; turning off.\n");
return -EINVAL;
}
ret = register_module_notifier(&klp_module_nb);
if (ret)
return ret;