1 files changed, 50 insertions, 0 deletions
diff --git a/include/linux/kasan-checks.h b/include/linux/kasan-checks.h
new file mode 100644
index 000000000..3d6d22a25
--- /dev/null
+++ b/include/linux/kasan-checks.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_KASAN_CHECKS_H
+#define _LINUX_KASAN_CHECKS_H
+
+#include <linux/types.h>
+
+/*
+ * The annotations present in this file are only relevant for the software
+ * KASAN modes that rely on compiler instrumentation, and will be optimized
+ * away for the hardware tag-based KASAN mode. Use kasan_check_byte() instead.
+ */
+
+/*
+ * __kasan_check_*: Always available when KASAN is enabled. This may be used
+ * even in compilation units that selectively disable KASAN, but must use KASAN
+ * to validate access to an address.   Never use these in header files!
+ */
+#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
+bool __kasan_check_read(const volatile void *p, unsigned int size);
+bool __kasan_check_write(const volatile void *p, unsigned int size);
+#else
+static inline bool __kasan_check_read(const volatile void *p, unsigned int size)
+{
+	return true;
+}
+static inline bool __kasan_check_write(const volatile void *p, unsigned int size)
+{
+	return true;
+}
+#endif
+
+/*
+ * kasan_check_*: Only available when the particular compilation unit has KASAN
+ * instrumentation enabled. May be used in header files.
+ */
+#ifdef __SANITIZE_ADDRESS__
+#define kasan_check_read __kasan_check_read
+#define kasan_check_write __kasan_check_write
+#else
+static inline bool kasan_check_read(const volatile void *p, unsigned int size)
+{
+	return true;
+}
+static inline bool kasan_check_write(const volatile void *p, unsigned int size)
+{
+	return true;
+}
+#endif
+
+#endif