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diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -351,4 +351,37 @@
#define DECLARE_FLEX_ARRAY(_t, _n) \
struct { struct { } __dummy_ ## _n; _t _n[0]; }
+/*
+ * The following functions/macros are debug/diagnostics tools. They default to
+ * no-ops, except `might_sleep()` which uses `WITNESS_WARN()` on FreeBSD.
+ */
+static inline void
+__might_resched(const char *file, int line, unsigned int offsets)
+{
+}
+
+static inline void
+__might_sleep(const char *file, int line)
+{
+}
+
+static inline void
+might_fault(void)
+{
+}
+
+#define might_sleep() \
+ WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "might_sleep()")
+
+#define might_sleep_if(cond) do { \
+ if (cond) { might_sleep(); } \
+} while (0)
+
+#define might_resched() do { } while (0)
+#define cant_sleep() do { } while (0)
+#define cant_migrate() do { } while (0)
+#define sched_annotate_sleep() do { } while (0)
+#define non_block_start() do { } while (0)
+#define non_block_end() do { } while (0)
+
#endif /* _LINUXKPI_LINUX_KERNEL_H_ */
diff --git a/sys/compat/linuxkpi/common/include/linux/wait.h b/sys/compat/linuxkpi/common/include/linux/wait.h
--- a/sys/compat/linuxkpi/common/include/linux/wait.h
+++ b/sys/compat/linuxkpi/common/include/linux/wait.h
@@ -43,13 +43,6 @@
#define SKIP_SLEEP() (SCHEDULER_STOPPED() || kdb_active)
-#define might_sleep() \
- WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "might_sleep()")
-
-#define might_sleep_if(cond) do { \
- if (cond) { might_sleep(); } \
-} while (0)
-
struct wait_queue;
struct wait_queue_head;

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