kcsan: Move kcsan_{disable,enable}_current() to kcsan-checks.h

Both affect access checks, and should therefore be in kcsan-checks.h.
This is in preparation to use these in compiler.h.
Acked-by: NWill Deacon <will@kernel.org>
Signed-off-by: NMarco Elver <elver@google.com>
Signed-off-by: NPaul E. McKenney <paulmck@kernel.org>

include/linux/kcsan-checks.h

@@ -36,6 +36,20 @@
  */
 void __kcsan_check_access(const volatile void *ptr, size_t size, int type);
 
+/**
+ * kcsan_disable_current - disable KCSAN for the current context
+ *
+ * Supports nesting.
+ */
+void kcsan_disable_current(void);
+
+/**
+ * kcsan_enable_current - re-enable KCSAN for the current context
+ *
+ * Supports nesting.
+ */
+void kcsan_enable_current(void);
+
 /**
  * kcsan_nestable_atomic_begin - begin nestable atomic region
  *
@@ -133,6 +147,8 @@ void kcsan_end_scoped_access(struct kcsan_scoped_access *sa);
 static inline void __kcsan_check_access(const volatile void *ptr, size_t size,
 					int type) { }
 
+static inline void kcsan_disable_current(void)		{ }
+static inline void kcsan_enable_current(void)		{ }
 static inline void kcsan_nestable_atomic_begin(void)	{ }
 static inline void kcsan_nestable_atomic_end(void)	{ }
 static inline void kcsan_flat_atomic_begin(void)	{ }

include/linux/kcsan.h

@@ -50,25 +50,9 @@ struct kcsan_ctx {
  */
 void kcsan_init(void);
 
-/**
- * kcsan_disable_current - disable KCSAN for the current context
- *
- * Supports nesting.
- */
-void kcsan_disable_current(void);
-
-/**
- * kcsan_enable_current - re-enable KCSAN for the current context
- *
- * Supports nesting.
- */
-void kcsan_enable_current(void);
-
 #else /* CONFIG_KCSAN */
 
 static inline void kcsan_init(void)			{ }
-static inline void kcsan_disable_current(void)		{ }
-static inline void kcsan_enable_current(void)		{ }
 
 #endif /* CONFIG_KCSAN */