WARNING: line length of 85 exceeds 80 columns
#91: FILE: arch/powerpc/kernel/trace/ftrace.c:437:
+	if (!function_graph_enter_regs(parent_ip, ip, 0, (unsigned long *)sp, fregs))

WARNING: line length of 81 exceeds 80 columns
#104: FILE: arch/powerpc/kernel/trace/ftrace_64_pg.c:803:
+__prepare_ftrace_return(unsigned long parent, unsigned long ip, unsigned long sp,

WARNING: line length of 82 exceeds 80 columns
#114: FILE: arch/powerpc/kernel/trace/ftrace_64_pg.c:821:
+	if (!function_graph_enter_regs(parent, ip, 0, (unsigned long *)sp, fregs))

CHECK: extern prototypes should be avoided in .h files
#255: FILE: include/linux/ftrace.h:1069:
+extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace,

WARNING: line length of 82 exceeds 80 columns
#337: FILE: kernel/trace/fgraph.c:930:
+	.flags			= FTRACE_OPS_GRAPH_STUB | FTRACE_OPS_FL_SAVE_ARGS,

total: 0 errors, 4 warnings, 1 checks, 358 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 d2ccbf9a68c9 ("function_graph: Pass ftrace_regs to entryfunc") 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, 4 warnings, 1 checks, 358 lines checked