WARNING: line length of 85 exceeds 80 columns
#70: FILE: tools/lib/bpf/gen_loader.c:463:
+	libbpf_sha256(gen->data_start, gen->data_cur - gen->data_start, (__u8 *)sha);

CHECK: Macro argument 'd' may be better as '(d)' to avoid precedence issues
#179: FILE: tools/lib/bpf/libbpf.c:14316:
+#define SHA256_ROUND(i, a, b, c, d, e, f, g, h)                                \
+	{                                                                      \
+		__u32 tmp = h + Sigma_1(e) + Ch(e, f, g) + sha256_K[i] + w[i]; \
+		d += tmp;                                                      \
+		h = tmp + Sigma_0(a) + Maj(a, b, c);                           \
+	}

CHECK: Macro argument 'h' may be better as '(h)' to avoid precedence issues
#179: FILE: tools/lib/bpf/libbpf.c:14316:
+#define SHA256_ROUND(i, a, b, c, d, e, f, g, h)                                \
+	{                                                                      \
+		__u32 tmp = h + Sigma_1(e) + Ch(e, f, g) + sha256_K[i] + w[i]; \
+		d += tmp;                                                      \
+		h = tmp + Sigma_0(a) + Maj(a, b, c);                           \
+	}

WARNING: Consider removing the code enclosed by this #if 0 and its #endif
#271: FILE: tools/lib/bpf/libbpf.c:14386:
+#if 0 /* To test libbpf_sha256(), uncomment this.  Requires -lcrypto. */

WARNING: line length of 81 exceeds 80 columns
#305: FILE: tools/lib/bpf/libbpf_internal.h:742:
+void libbpf_sha256(const void *data, size_t len, __u8 out[SHA256_DIGEST_LENGTH]);

total: 0 errors, 3 warnings, 2 checks, 259 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 87451cfd0465 ("libbpf: Don't use AF_ALG for SHA-256") 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, 3 warnings, 2 checks, 259 lines checked