WARNING: line length of 87 exceeds 80 columns
#79: FILE: include/linux/mm.h:4177:
+/* Use the lowest bit of PAGE_OFFSET if there's at least 8 bits available; see above */

WARNING: Comparisons should place the constant on the right side of the test
#82: FILE: include/linux/mm.h:4180:
+			    PAGE_OFFSET >= PP_DMA_INDEX_MIN_OFFSET && \

WARNING: line length of 83 exceeds 80 columns
#84: FILE: include/linux/mm.h:4182:
+			      MIN(32, __ffs(PAGE_OFFSET) - PP_DMA_INDEX_SHIFT) : 0)

WARNING: line length of 81 exceeds 80 columns
#110: FILE: net/core/page_pool.c:488:
+		err = xa_alloc_bh(&pool->dma_mapped, &id, netmem_to_page(netmem),

total: 0 errors, 4 warnings, 0 checks, 147 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 2550ad7eb3bf ("page_pool: Fix PP_MAGIC_MASK to avoid crashing on some 32-bit arches") 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, 4 warnings, 0 checks, 147 lines checked