WARNING: line length of 83 exceeds 80 columns
#111: FILE: lib/ref_tracker.c:55:
+	__xa_set_mark(&debugfs_dentries, (unsigned long)dir, REF_TRACKER_DIR_DEAD);

WARNING: line length of 87 exceeds 80 columns
#143: FILE: lib/ref_tracker.c:354:
+static int ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct seq_file *seq)

WARNING: Using vsprintf specifier '%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '%p'.
#224: FILE: lib/ref_tracker.c:432:
+	ret = snprintf(name, sizeof(name), "%s@%px", dir->class, dir);

WARNING: line length of 81 exceeds 80 columns
#234: FILE: lib/ref_tracker.c:442:
+			old = xa_store_irq(&debugfs_dentries, (unsigned long)dir,

WARNING: line length of 92 exceeds 80 columns
#254: FILE: lib/ref_tracker.c:462:
+		xa_for_each_marked(&debugfs_dentries, index, dentry, REF_TRACKER_DIR_DEAD) {

total: 0 errors, 5 warnings, 0 checks, 217 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit e397e390e1c4 ("ref_tracker: automatically register a file in debugfs for a ref_tracker_dir") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 5 warnings, 0 checks, 217 lines checked