WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#205: FILE: drivers/net/ethernet/stmicro/stmmac/stmmac_serdes.c:1:
+#include <linux/phy/phy.h>

WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#322: FILE: drivers/net/ethernet/stmicro/stmmac/stmmac_serdes.h:1:
+#ifndef STMMAC_SERDES_H

total: 0 errors, 2 warnings, 0 checks, 283 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 e17641ab66d4 ("net: stmmac: add stmmac core serdes support") 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, 2 warnings, 0 checks, 283 lines checked