WARNING: line length of 82 exceeds 80 columns
#65: FILE: tools/lib/bpf/usdt.bpf.h:73:
+/* Helpers to (un)pack SIB extras from idx_packed without relying on bitfields. */

WARNING: line length of 83 exceeds 80 columns
#93: FILE: tools/lib/bpf/usdt.bpf.h:234:
+		 * is in arg_spec->val_off, the scale factor is in arg_spec->scale.

WARNING: line length of 81 exceeds 80 columns
#97: FILE: tools/lib/bpf/usdt.bpf.h:238:
+		 * base address and the offset to get the final address. Finally,

WARNING: line length of 96 exceeds 80 columns
#103: FILE: tools/lib/bpf/usdt.bpf.h:244:
+		err = bpf_probe_read_kernel(&val, sizeof(val), (void *)ctx + arg_spec->reg_off);

WARNING: line length of 86 exceeds 80 columns
#106: FILE: tools/lib/bpf/usdt.bpf.h:247:
+		err = bpf_probe_read_kernel(&idx, sizeof(idx), (void *)ctx + idx_off);

WARNING: line length of 108 exceeds 80 columns
#109: FILE: tools/lib/bpf/usdt.bpf.h:250:
+		err = bpf_probe_read_user(&val, sizeof(val), (void *)val + idx * scale + arg_spec->val_off);

WARNING: line length of 82 exceeds 80 columns
#142: FILE: tools/lib/bpf/usdt.c:220:
+/* Helpers to (un)pack SIB extras from idx_packed without relying on bitfields. */

WARNING: line length of 87 exceeds 80 columns
#144: FILE: tools/lib/bpf/usdt.c:222:
+	((__u16)(((__u16)((idx_off) & 0x0fff)) << 4) | (__u16)((scale_shift) & 0x000f))

WARNING: line length of 86 exceeds 80 columns
#162: FILE: tools/lib/bpf/usdt.c:1299:
+			   arg_sz, &off, reg_name, idx_reg_name, &scale, &len) == 5 ||

CHECK: Alignment should match open parenthesis
#162: FILE: tools/lib/bpf/usdt.c:1299:
+	if (sscanf(arg_str, " %d @ %ld ( %%%15[^,] , %%%15[^,] , %d ) %n",
+			   arg_sz, &off, reg_name, idx_reg_name, &scale, &len) == 5 ||

CHECK: Alignment should match open parenthesis
#164: FILE: tools/lib/bpf/usdt.c:1301:
+		sscanf(arg_str, " %d @ ( %%%15[^,] , %%%15[^,] , %d ) %n",
+			   arg_sz, reg_name, idx_reg_name, &scale, &len) == 4 ||

CHECK: Alignment should match open parenthesis
#166: FILE: tools/lib/bpf/usdt.c:1303:
+		sscanf(arg_str, " %d @ %ld ( %%%15[^,] , %%%15[^)] ) %n",
+			   arg_sz, &off, reg_name, idx_reg_name, &len) == 4 ||

CHECK: Alignment should match open parenthesis
#168: FILE: tools/lib/bpf/usdt.c:1305:
+		sscanf(arg_str, " %d @ ( %%%15[^,] , %%%15[^)] ) %n",
+			   arg_sz, reg_name, idx_reg_name, &len) == 3

CHECK: braces {} should be used on all arms of this statement
#190: FILE: tools/lib/bpf/usdt.c:1326:
+		if (scale == 1)
[...]
+		else if (scale == 2)
[...]
+		else if (scale == 4)
[...]
+		else if (scale == 8)
[...]
+		else {
[...]

CHECK: Unbalanced braces around else statement
#198: FILE: tools/lib/bpf/usdt.c:1334:
+		else {

WARNING: line length of 106 exceeds 80 columns
#199: FILE: tools/lib/bpf/usdt.c:1335:
+			pr_warn("usdt: invalid SIB scale %d, expected 1,2,4,8; defaulting to 1\n", scale);

total: 0 errors, 10 warnings, 6 checks, 176 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 64ec26947a71 ("libbpf: fix USDT SIB argument handling causing unrecognized register error") 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, 10 warnings, 6 checks, 176 lines checked