ERROR: spaces required around that '=' (ctx:VxV)
#116: FILE: include/uapi/linux/sysctl.h:576:
+	NET_IPV6_FORCE_FORWARDING=29,
 	                         ^

WARNING: line length of 100 exceeds 80 columns
#144: FILE: net/ipv6/addrconf.c:862:
+			/* Disabling all.forwarding sets 0 to force_forwarding for all interfaces */

WARNING: line length of 90 exceeds 80 columns
#174: FILE: net/ipv6/addrconf.c:6759:
+				inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF,

WARNING: line length of 87 exceeds 80 columns
#175: FILE: net/ipv6/addrconf.c:6760:
+							     NETCONFA_FORCE_FORWARDING,

WARNING: line length of 87 exceeds 80 columns
#176: FILE: net/ipv6/addrconf.c:6761:
+							     dev->ifindex, &idev->cnf);

WARNING: line length of 83 exceeds 80 columns
#181: FILE: net/ipv6/addrconf.c:6766:
+static int addrconf_sysctl_force_forwarding(const struct ctl_table *ctl, int write,

WARNING: line length of 85 exceeds 80 columns
#182: FILE: net/ipv6/addrconf.c:6767:
+					    void *buffer, size_t *lenp, loff_t *ppos)

WARNING: struct ctl_table should normally be const
#185: FILE: net/ipv6/addrconf.c:6770:
+	struct ctl_table tmp_ctl = *ctl;

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#275: 
new file mode 100755

WARNING: line length of 89 exceeds 80 columns
#338: FILE: tools/testing/selftests/net/ipv6_force_forwarding.sh:59:
+    if ! ip netns exec $ns2 test -f /proc/sys/net/ipv6/conf/veth21/force_forwarding; then

total: 1 errors, 9 warnings, 0 checks, 287 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 0b32cc589aa5 ("ipv6: add `force_forwarding` sysctl to enable per-interface forwarding") 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.