From: Weizhao Ouyang Date: Fri, 23 Jul 2021 22:50:08 +0000 (-0700) Subject: kfence: defer kfence_test_init to ensure that kunit debugfs is created X-Git-Tag: v5.15~666^2~12 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=32ae8a0669392248a92d7545a7363004543f3932;p=platform%2Fkernel%2Flinux-starfive.git kfence: defer kfence_test_init to ensure that kunit debugfs is created kfence_test_init and kunit_init both use the same level late_initcall, which means if kfence_test_init linked ahead of kunit_init, kfence_test_init will get a NULL debugfs_rootdir as parent dentry, then kfence_test_init and kfence_debugfs_init both create a debugfs node named "kfence" under debugfs_mount->mnt_root, and it will throw out "debugfs: Directory 'kfence' with parent '/' already present!" with EEXIST. So kfence_test_init should be deferred. Link: https://lkml.kernel.org/r/20210714113140.2949995-1-o451686892@gmail.com Signed-off-by: Weizhao Ouyang Tested-by: Marco Elver Cc: Alexander Potapenko Cc: Dmitry Vyukov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/kfence/kfence_test.c b/mm/kfence/kfence_test.c index 7f24b9bcb2ec..942cbc16ad26 100644 --- a/mm/kfence/kfence_test.c +++ b/mm/kfence/kfence_test.c @@ -852,7 +852,7 @@ static void kfence_test_exit(void) tracepoint_synchronize_unregister(); } -late_initcall(kfence_test_init); +late_initcall_sync(kfence_test_init); module_exit(kfence_test_exit); MODULE_LICENSE("GPL v2");