CHECK: No space is necessary after a cast
#442: FILE: net/ethtool/netlink.c:1406:
+		.maxattr = ARRAY_SIZE(ethnl_loopback_get_policy) - 1,

CHECK: No space is necessary after a cast
#449: FILE: net/ethtool/netlink.c:1413:
+		.maxattr = ARRAY_SIZE(ethnl_loopback_set_policy) - 1,

WARNING: line length of 85 exceeds 80 columns
#470: FILE: net/ethtool/netlink.h:535:
+extern const struct nla_policy ethnl_loopback_get_policy[ETHTOOL_A_LOOPBACK_MAX + 1];

WARNING: line length of 85 exceeds 80 columns
#471: FILE: net/ethtool/netlink.h:536:
+extern const struct nla_policy ethnl_loopback_set_policy[ETHTOOL_A_LOOPBACK_MAX + 1];

total: 0 errors, 2 warnings, 2 checks, 422 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 b0e92f9290e6 ("ethtool: Add loopback GET/SET netlink implementation") 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, 2 checks, 422 lines checked