WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#52: 
new file mode 100644

WARNING: line length of 81 exceeds 80 columns
#61: FILE: include/linux/kfunc_md.h:5:
+#define KFUNC_MD_FL_DEAD		(1 << 0) /* the md shouldn't be reused */

CHECK: Prefer using the BIT macro
#61: FILE: include/linux/kfunc_md.h:5:
+#define KFUNC_MD_FL_DEAD		(1 << 0) /* the md shouldn't be reused */

CHECK: Please use a blank line after function/struct/union/enum declarations
#166: FILE: kernel/trace/kfunc_md.c:48:
+};
+/* used for the padding-based function metadata */

CHECK: Please don't use multiple blank lines
#172: FILE: kernel/trace/kfunc_md.c:54:
+
+

WARNING: line length of 85 exceeds 80 columns
#294: FILE: kernel/trace/kfunc_md.c:176:
+	new_mds->mds = kvmalloc_array(new_mds->kfunc_md_count, sizeof(*new_mds->mds),

WARNING: From:/Signed-off-by: email address mismatch: 'From: Menglong Dong <menglong8.dong@gmail.com>' != 'Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>'

total: 0 errors, 4 warnings, 3 checks, 617 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 91051935300d ("add per-function metadata storage support") 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, 3 checks, 617 lines checked