WARNING: line length of 92 exceeds 80 columns
#45: FILE: include/linux/ftrace.h:581:
+static inline int update_ftrace_direct_add(struct ftrace_ops *ops, struct ftrace_hash *hash)

WARNING: line length of 81 exceeds 80 columns
#74: FILE: kernel/trace/ftrace.c:6264:
+static struct ftrace_hash *hash_add(struct ftrace_hash *a, struct ftrace_hash *b)

WARNING: line length of 89 exceeds 80 columns
#91: FILE: kernel/trace/ftrace.c:6281:
+			if (add_hash_entry_direct(add, entry->ip, entry->direct) == NULL)

CHECK: Comparison to NULL could be written "!add_hash_entry_direct"
#91: FILE: kernel/trace/ftrace.c:6281:
+			if (add_hash_entry_direct(add, entry->ip, entry->direct) == NULL)

WARNING: line length of 86 exceeds 80 columns
#104: FILE: kernel/trace/ftrace.c:6294:
+	struct ftrace_hash *old_direct_functions = NULL, *new_direct_functions = NULL;

WARNING: line length of 86 exceeds 80 columns
#182: FILE: kernel/trace/ftrace.c:6372:
+		call_rcu_tasks(&old_direct_functions->rcu, register_ftrace_direct_cb);

total: 0 errors, 5 warnings, 1 checks, 153 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 485aad4848e0 ("ftrace: Add update_ftrace_direct_add function") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 1 checks, 153 lines checked