WARNING: line length of 86 exceeds 80 columns
#64: FILE: net/xfrm/xfrm_iptfs.c:816:
+				   /* ((uintptr_t)(skb->data + data) & 0x3) == 0 && */

WARNING: line length of 82 exceeds 80 columns
#101: FILE: net/xfrm/xfrm_iptfs.c:853:
+				/* all pointers could be changed now reset walk */

WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
#140: FILE: net/xfrm/xfrm_iptfs.c:878:
+			BUG_ON(skb->len != capturelen);

WARNING: line length of 81 exceeds 80 columns
#157: FILE: net/xfrm/xfrm_iptfs.c:922:
+	if (first_skb && first_iplen && !defer && first_skb != xtfs->ra_newskb) {

WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
#169: FILE: net/xfrm/xfrm_iptfs.c:934:
+		BUG_ON(skb == defer);

WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
#189: FILE: net/xfrm/xfrm_iptfs.c:952:
+		BUG_ON(!skb);

total: 0 errors, 6 warnings, 0 checks, 169 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 ababa300867c ("xfrm: iptfs: add reusing received skb for the tunnel egress packet") 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, 6 warnings, 0 checks, 169 lines checked