ERROR: that open brace { should be on the previous line
#112: FILE: net/ethtool/loopback.c:27:
+	[ETHTOOL_A_LOOPBACK_ENTRY_NAME] =
+		{ .type = NLA_NUL_STRING, .len = ETH_GSTRING_LEN - 1 },

WARNING: line length of 83 exceeds 80 columns
#217: FILE: net/ethtool/loopback.c:132:
+const struct nla_policy ethnl_loopback_set_policy[ETHTOOL_A_LOOPBACK_ENTRY + 1] = {

WARNING: line length of 85 exceeds 80 columns
#219: FILE: net/ethtool/loopback.c:134:
+	[ETHTOOL_A_LOOPBACK_ENTRY]  = NLA_POLICY_NESTED(ethnl_loopback_entry_policy),

WARNING: line length of 88 exceeds 80 columns
#400: FILE: net/ethtool/netlink.h:503:
+extern const struct nla_policy ethnl_loopback_get_policy[ETHTOOL_A_LOOPBACK_HEADER + 1];

WARNING: line length of 87 exceeds 80 columns
#401: FILE: net/ethtool/netlink.h:504:
+extern const struct nla_policy ethnl_loopback_set_policy[ETHTOOL_A_LOOPBACK_ENTRY + 1];

total: 1 errors, 4 warnings, 0 checks, 344 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 9614f0791fdf ("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.