WARNING: Argument 'ptr' is not used in function-like macro
#54: FILE: include/asm-generic/barrier.h:284:
+#define cpu_poll_relax(ptr, val, timeout_ns)	cpu_relax()

WARNING: Argument 'val' is not used in function-like macro
#54: FILE: include/asm-generic/barrier.h:284:
+#define cpu_poll_relax(ptr, val, timeout_ns)	cpu_relax()

WARNING: Argument 'timeout_ns' is not used in function-like macro
#54: FILE: include/asm-generic/barrier.h:284:
+#define cpu_poll_relax(ptr, val, timeout_ns)	cpu_relax()

WARNING: Macros with flow control statements should be avoided
#70: FILE: include/asm-generic/barrier.h:300:
+#define smp_cond_load_relaxed_timeout(ptr, cond_expr,			\
+				      time_expr_ns, timeout_ns)		\
+({									\
+	__label__ __out, __done;					\
+	typeof(ptr) __PTR = (ptr);					\
+	__unqual_scalar_typeof(*ptr) VAL;				\
+	u32 __n = 0, __spin = SMP_TIMEOUT_POLL_COUNT;			\
+	s64 __time_now = (s64)(time_expr_ns);				\
+	s64 __timeout = (s64)timeout_ns;				\
+	s64 __time_end = __time_now + __timeout;			\
+									\
+	if (__time_now <= 0)						\
+		goto __out;						\
+									\
+	for (;;) {							\
+		VAL = READ_ONCE(*__PTR);				\
+		if (cond_expr)						\
+			goto __done;					\
+		cpu_poll_relax(__PTR, VAL, __timeout);			\
+		if (++__n < __spin)					\
+			continue;					\
+		__time_now = (s64)(time_expr_ns);			\
+		__timeout = __time_end - __time_now;			\
+		if (__time_now <= 0 || __timeout <= 0)			\
+			goto __out;					\
+		__n = 0;						\
+	}								\
+__out:									\
+	VAL = READ_ONCE(*__PTR);					\
+__done:								\
+	(typeof(*ptr))VAL;						\
+})

total: 0 errors, 4 warnings, 0 checks, 64 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 4c91efe39cf8 ("asm-generic: barrier: Add smp_cond_load_relaxed_timeout()") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 4 warnings, 0 checks, 64 lines checked