WARNING: line length of 85 exceeds 80 columns
#88: FILE: include/linux/page_frag_cache.h:17:
+#define PAGE_FRAG_CACHE_PFMEMALLOC_BIT		BIT(PAGE_FRAG_CACHE_PFMEMALLOC_SHIFT)

WARNING: line length of 85 exceeds 80 columns
#95: FILE: include/linux/page_frag_cache.h:24:
+#define PAGE_FRAG_CACHE_PFMEMALLOC_BIT		BIT(PAGE_FRAG_CACHE_PFMEMALLOC_SHIFT)

WARNING: line length of 81 exceeds 80 columns
#132: FILE: mm/page_frag_cache.c:23:
+static unsigned long page_frag_encode_page(struct page *page, unsigned int order,

WARNING: line length of 81 exceeds 80 columns
#184: FILE: mm/page_frag_cache.c:73:
+		page_frag_encode_page(page, order, page_is_pfmemalloc(page)) : 0;

WARNING: line length of 84 exceeds 80 columns
#259: FILE: mm/page_frag_cache.c:147:
+					page_frag_encoded_page_order(encoded_page));

WARNING: From:/Signed-off-by: email address mismatch: 'From: Yunsheng Lin <yunshenglin0825@gmail.com>' != 'Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>'

total: 0 errors, 6 warnings, 0 checks, 217 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 251126f2b70c ("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, 217 lines checked