WARNING: Argument '_key' is not used in function-like macro
#58: FILE: include/linux/fault-inject.h:41:
+#define FAULT_ATTR_INITIALIZER_KEY(_key) {				\
 		.interval = 1,						\
 		.times = ATOMIC_INIT(1),				\
 		.require_end = ULONG_MAX,				\

WARNING: braces {} are not necessary for any arm of this statement
#112: FILE: lib/fault-inject.c:205:
+		if (attr->probability != 0 && val == 0) {
[...]
+		} else if (attr->probability == 0 && val != 0) {
[...]

WARNING: line length of 81 exceeds 80 columns
#135: FILE: lib/fault-inject.c:228:
+DEFINE_SIMPLE_ATTRIBUTE(fops_prob, debugfs_prob_get, debugfs_prob_set, "%llu\n");

total: 0 errors, 3 warnings, 0 checks, 100 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 0c6862a1bc0f ("fault-inject: add support for static keys around fault injection sites") 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, 0 checks, 100 lines checked