fix kconfig

Kconfig

@@ -1,6 +1,6 @@
 mainmenu "Zinnia Kernel Configuration"
 
-source "device/Kconfig"
+source "dev/Kconfig"
 
 config KERNEL_FLAVOR
   string "Kernel flavor name"

kernel/include/kernel/assert.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <common/compiler.h>
+#include <kernel/panic.h>
+
+// Like the standard C assert, but also active in debug builds.
+#define kassert(expr, msg, ...) \
+    ({ \
+        if (__unlikely(!(expr))) { \
+            panic( \
+                "In function \"%s\" (%s:%u):\n" \
+                "Assertion \"%s\" failed!\n" msg, \
+                __FUNCTION__, \
+                __FILE__, \
+                __LINE__, \
+                #expr, \
+                ##__VA_ARGS__ \
+            ); \
+        } \
+    })
+
+#ifndef NDEBUG
+#define debug_assert(...) kassert(__VA_ARGS__)
+#else
+#define debug_assert(...) ((void)0)
+#endif