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authorJiri Kosina <jkosina@suse.cz>2019-05-10 23:47:50 +0200
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-05-10 17:53:29 -0400
commit56e33afd7757d5da2664fb797f2544ce167176be (patch)
treeb86351525627ac853df3c0df5028699147bbe295 /kernel
parent562e14f72292249e52e6346a9e3a30be652b0cf6 (diff)
downloadtip-56e33afd7757d5da2664fb797f2544ce167176be.tar.gz
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livepatch: Remove klp_check_compiler_support()
The only purpose of klp_check_compiler_support() is to make sure that we are not using ftrace on x86 via mcount (because that's executed only after prologue has already happened, and that's too late for livepatching purposes). Now that mcount is not supported by ftrace any more, there is no need for klp_check_compiler_support() either. Link: http://lkml.kernel.org/r/nycvar.YFH.7.76.1905102346100.17054@cbobk.fhfr.pm Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/livepatch/core.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index eb0ee10a1981..112a36ed4a09 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -1220,14 +1220,6 @@ void klp_module_going(struct module *mod)
static int __init klp_init(void)
{
- int ret;
-
- ret = klp_check_compiler_support();
- if (ret) {
- pr_info("Your compiler is too old; turning off.\n");
- return -EINVAL;
- }
-
klp_root_kobj = kobject_create_and_add("livepatch", kernel_kobj);
if (!klp_root_kobj)
return -ENOMEM;