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| author | Weizhao Ouyang <o451686892@gmail.com> | 2021-07-24 00:50:08 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-24 02:43:28 +0200 |
| commit | 32ae8a0669392248a92d7545a7363004543f3932 (patch) | |
| tree | 611c386b849a5cad17769a10209985ceaf986079 | |
| parent | selftest: use mmap instead of posix_memalign to allocate memory (diff) | |
| download | linux-32ae8a0669392248a92d7545a7363004543f3932.tar.xz linux-32ae8a0669392248a92d7545a7363004543f3932.zip | |
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 <o451686892@gmail.com>
Tested-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/kfence/kfence_test.c | 2 |
1 files changed, 1 insertions, 1 deletions
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"); |