CHECK: Macro argument 'uf' may be better as '(uf)' to avoid precedence issues
#68: FILE: include/linux/skbuff.h:3668:
+#define __skb_frag_dma_map1(dev, frag, offset, uf, uo) ({		\
+	const skb_frag_t *uf = (frag);					\
+	size_t uo = (offset);						\
+									\
+	__skb_frag_dma_map(dev, uf, uo, skb_frag_size(uf) - uo,		\
+			   DMA_TO_DEVICE);				\
+})

total: 0 errors, 0 warnings, 1 checks, 48 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 4cdc7c9a1c4f ("skbuff: allow 2-4-argument skb_frag_dma_map()") 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, 0 warnings, 1 checks, 48 lines checked