kernel

linux-6.8.1/include/linux/debug_locks.h

@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_DEBUG_LOCKING_H
+#define __LINUX_DEBUG_LOCKING_H
+
+#include <linux/atomic.h>
+#include <linux/cache.h>
+
+struct task_struct;
+
+extern int debug_locks __read_mostly;
+extern int debug_locks_silent __read_mostly;
+
+
+static __always_inline int __debug_locks_off(void)
+{
+	return xchg(&debug_locks, 0);
+}
+
+/*
+ * Generic 'turn off all lock debugging' function:
+ */
+extern int debug_locks_off(void);
+
+#define DEBUG_LOCKS_WARN_ON(c)						\
+({									\
+	int __ret = 0;							\
+									\
+	if (!oops_in_progress && unlikely(c)) {				\
+		instrumentation_begin();				\
+		if (debug_locks_off() && !debug_locks_silent)		\
+			WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c);		\
+		instrumentation_end();					\
+		__ret = 1;						\
+	}								\
+	__ret;								\
+})
+
+#ifdef CONFIG_SMP
+# define SMP_DEBUG_LOCKS_WARN_ON(c)			DEBUG_LOCKS_WARN_ON(c)
+#else
+# define SMP_DEBUG_LOCKS_WARN_ON(c)			do { } while (0)
+#endif
+
+#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
+  extern void locking_selftest(void);
+#else
+# define locking_selftest()	do { } while (0)
+#endif
+
+#ifdef CONFIG_LOCKDEP
+extern void debug_show_all_locks(void);
+extern void debug_show_held_locks(struct task_struct *task);
+extern void debug_check_no_locks_freed(const void *from, unsigned long len);
+extern void debug_check_no_locks_held(void);
+#else
+static inline void debug_show_all_locks(void)
+{
+}
+
+static inline void debug_show_held_locks(struct task_struct *task)
+{
+}
+
+static inline void
+debug_check_no_locks_freed(const void *from, unsigned long len)
+{
+}
+
+static inline void
+debug_check_no_locks_held(void)
+{
+}
+#endif
+
+#endif