WARNING: line length of 85 exceeds 80 columns
#89: FILE: include/linux/page_frag_cache.h:18:
+#define PAGE_FRAG_CACHE_PFMEMALLOC_BIT		BIT(PAGE_FRAG_CACHE_PFMEMALLOC_SHIFT)

WARNING: line length of 85 exceeds 80 columns
#96: FILE: include/linux/page_frag_cache.h:25:
+#define PAGE_FRAG_CACHE_PFMEMALLOC_BIT		BIT(PAGE_FRAG_CACHE_PFMEMALLOC_SHIFT)

WARNING: line length of 84 exceeds 80 columns
#99: FILE: include/linux/page_frag_cache.h:28:
+static inline unsigned long page_frag_encoded_page_order(unsigned long encoded_page)

WARNING: line length of 81 exceeds 80 columns
#114: FILE: include/linux/page_frag_cache.h:43:
+static inline struct page *page_frag_encoded_page_ptr(unsigned long encoded_page)

WARNING: line length of 81 exceeds 80 columns
#153: FILE: mm/page_frag_cache.c:22:
+static unsigned long page_frag_encode_page(struct page *page, unsigned int order,

WARNING: line length of 84 exceeds 80 columns
#263: FILE: mm/page_frag_cache.c:133:
+					page_frag_encoded_page_order(encoded_page));

total: 0 errors, 6 warnings, 0 checks, 222 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 d21c4b1f075b ("mm: page_frag: reuse existing space for 'size' and 'pfmemalloc'") 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, 222 lines checked