WARNING: line length of 85 exceeds 80 columns
#41: FILE: include/linux/page_frag_cache.h:84:
+					    struct page_frag *pfrag, bool referenced,

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
#45: FILE: include/linux/page_frag_cache.h:88:
+		VM_BUG_ON(!nc->pagecnt_bias);

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
#49: FILE: include/linux/page_frag_cache.h:92:
+	VM_BUG_ON(used_sz > pfrag->size);

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
#50: FILE: include/linux/page_frag_cache.h:93:
+	VM_BUG_ON(pfrag->page != page_frag_encoded_page_ptr(nc->encoded_page));

WARNING: line length of 84 exceeds 80 columns
#52: FILE: include/linux/page_frag_cache.h:95:
+	/* nc->offset is not reset when reusing an old page, so do not check for the

WARNING: line length of 84 exceeds 80 columns
#54: FILE: include/linux/page_frag_cache.h:97:
+	 * Committed offset might be bigger than the current offset due to alignment

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
#56: FILE: include/linux/page_frag_cache.h:99:
+	VM_BUG_ON(pfrag->offset && nc->offset > pfrag->offset);

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
#57: FILE: include/linux/page_frag_cache.h:100:
+	VM_BUG_ON(pfrag->offset &&

WARNING: line length of 93 exceeds 80 columns
#58: FILE: include/linux/page_frag_cache.h:101:
+		  pfrag->offset + pfrag->size > page_frag_cache_page_size(nc->encoded_page));

WARNING: line length of 83 exceeds 80 columns
#62: FILE: include/linux/page_frag_cache.h:105:
+	/* Calculate true size for the fragment due to alignment, nc->offset is not

WARNING: line length of 92 exceeds 80 columns
#70: FILE: include/linux/page_frag_cache.h:113:
+static inline void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz,

WARNING: line length of 84 exceeds 80 columns
#71: FILE: include/linux/page_frag_cache.h:114:
+					    gfp_t gfp_mask, unsigned int align_mask)

WARNING: line length of 85 exceeds 80 columns
#76: FILE: include/linux/page_frag_cache.h:119:
+	va = __page_frag_cache_prepare(nc, fragsz, &page_frag, gfp_mask, align_mask);

total: 0 errors, 13 warnings, 0 checks, 115 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 989ac53080f9 ("mm: page_frag: some minor refactoring before adding new API") 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, 13 warnings, 0 checks, 115 lines checked