WARNING: line length of 83 exceeds 80 columns
#132: FILE: include/linux/mm.h:4280:
+#define PP_DMA_INDEX_BITS MIN(32, __ffs(POISON_POINTER_DELTA) - PP_DMA_INDEX_SHIFT)

WARNING: line length of 83 exceeds 80 columns
#285: FILE: net/core/page_pool.c:465:
+		/* re-check under rcu_read_lock() to sync with page_pool_scrub() */

WARNING: line length of 83 exceeds 80 columns
#294: FILE: net/core/page_pool.c:473:
+static bool page_pool_dma_map(struct page_pool *pool, netmem_ref netmem, gfp_t gfp)

WARNING: line length of 81 exceeds 80 columns
#316: FILE: net/core/page_pool.c:500:
+		err = xa_alloc_bh(&pool->dma_mapped, &id, netmem_to_page(netmem),

WARNING: line length of 93 exceeds 80 columns
#340: FILE: net/core/page_pool.c:531:
+	if (pool->dma_map && unlikely(!page_pool_dma_map(pool, page_to_netmem(page), gfp))) {

WARNING: line length of 81 exceeds 80 columns
#349: FILE: net/core/page_pool.c:577:
+		if (dma_map && unlikely(!page_pool_dma_map(pool, netmem, gfp))) {

total: 0 errors, 6 warnings, 0 checks, 286 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 48d7703fdf0d ("page_pool: Track DMA-mapped pages and unmap them when destroying the pool") 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, 286 lines checked