WARNING: line length of 83 exceeds 80 columns
#87: FILE: lib/buildid.c:38:
+static void freader_init_from_mem(struct freader *r, const char *data, u64 data_sz)

WARNING: line length of 88 exceeds 80 columns
#144: FILE: lib/buildid.c:95:
+	if (!r->page || file_off < r->file_off || file_off >= r->file_off + PAGE_SIZE) {

WARNING: line length of 81 exceeds 80 columns
#160: FILE: lib/buildid.c:111:
+		memcpy(r->buf, r->page_addr + (file_off - r->file_off), part_sz);

WARNING: const array should probably be static const
#198: FILE: lib/buildid.c:144:
+	const char note_name[] = "GNU";

WARNING: line length of 86 exceeds 80 columns
#208: FILE: lib/buildid.c:152:
+		nhdr = freader_fetch(r, note_offs, sizeof(Elf32_Nhdr) + note_name_sz);

CHECK: Blank lines aren't necessary after an open brace '{'
#225: FILE: lib/buildid.c:161:
 		    nhdr->n_descsz <= BUILD_ID_SIZE_MAX) {
+

WARNING: line length of 95 exceeds 80 columns
#226: FILE: lib/buildid.c:162:
+			build_id_off = note_offs + sizeof(Elf32_Nhdr) + ALIGN(note_name_sz, 4);

WARNING: line length of 91 exceeds 80 columns
#235: FILE: lib/buildid.c:171:
+			memset(build_id + build_id_sz, 0, BUILD_ID_SIZE_MAX - build_id_sz);

WARNING: line length of 83 exceeds 80 columns
#277: FILE: lib/buildid.c:205:
+static int get_build_id_32(struct freader *r, unsigned char *build_id, __u32 *size)

WARNING: line length of 87 exceeds 80 columns
#290: FILE: lib/buildid.c:215:
+	/* subsequent freader_fetch() calls invalidate pointers, so remember locally */

WARNING: line length of 84 exceeds 80 columns
#301: FILE: lib/buildid.c:223:
+		phdr = freader_fetch(r, i * sizeof(Elf32_Phdr), sizeof(Elf32_Phdr));

WARNING: line length of 87 exceeds 80 columns
#311: FILE: lib/buildid.c:228:
+		    !parse_build_id(r, build_id, size, phdr->p_offset, phdr->p_filesz))

WARNING: line length of 83 exceeds 80 columns
#320: FILE: lib/buildid.c:235:
+static int get_build_id_64(struct freader *r, unsigned char *build_id, __u32 *size)

WARNING: line length of 87 exceeds 80 columns
#333: FILE: lib/buildid.c:245:
+	/* subsequent freader_fetch() calls invalidate pointers, so remember locally */

WARNING: line length of 84 exceeds 80 columns
#344: FILE: lib/buildid.c:253:
+		phdr = freader_fetch(r, i * sizeof(Elf64_Phdr), sizeof(Elf64_Phdr));

WARNING: line length of 87 exceeds 80 columns
#354: FILE: lib/buildid.c:258:
+		    !parse_build_id(r, build_id, size, phdr->p_offset, phdr->p_filesz))

total: 0 errors, 15 warnings, 1 checks, 369 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 2ccb90ebdce6 ("lib/buildid: add single page-based file reader abstraction") 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, 15 warnings, 1 checks, 369 lines checked