diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index b26d0c163f..795d072091 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -148,7 +148,7 @@ target_compile_definitions(kernel PUBLIC __arch=${BANAN_ARCH})
 target_compile_options(kernel PUBLIC -O2 -g)
 target_compile_options(kernel PUBLIC $<$<COMPILE_LANGUAGE:CXX>:-Wno-literal-suffix -fno-rtti -fno-exceptions>)
 target_compile_options(kernel PUBLIC -fmacro-prefix-map=${CMAKE_CURRENT_SOURCE_DIR}=.)
-target_compile_options(kernel PUBLIC -fstack-protector -ffreestanding -Wall -Werror=return-type -Wstack-usage=1024 -fno-omit-frame-pointer -mgeneral-regs-only)
+target_compile_options(kernel PUBLIC -fstack-protector -ffreestanding -Wall -Wextra -Werror -Wstack-usage=1024 -fno-omit-frame-pointer -mgeneral-regs-only)
 
 # This might not work with other toolchains
 target_compile_options(kernel PUBLIC $<$<COMPILE_LANGUAGE:CXX>:-Wno-invalid-offsetof>)
diff --git a/kernel/kernel/Device/FramebufferDevice.cpp b/kernel/kernel/Device/FramebufferDevice.cpp
index 3f2b5de64a..c2ae7e8803 100644
--- a/kernel/kernel/Device/FramebufferDevice.cpp
+++ b/kernel/kernel/Device/FramebufferDevice.cpp
@@ -233,6 +233,7 @@ namespace Kernel
 
 		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override
 		{
+			(void)new_page_table;
 			return BAN::Error::from_errno(ENOTSUP);
 		}
 
@@ -275,4 +276,4 @@ namespace Kernel
 		return BAN::UniqPtr<MemoryRegion>(BAN::move(region));
 	}
 
-}
\ No newline at end of file
+}
diff --git a/kernel/kernel/FS/TmpFS/FileSystem.cpp b/kernel/kernel/FS/TmpFS/FileSystem.cpp
index 4bc9d1771c..1754dc4fed 100644
--- a/kernel/kernel/FS/TmpFS/FileSystem.cpp
+++ b/kernel/kernel/FS/TmpFS/FileSystem.cpp
@@ -197,7 +197,7 @@ namespace Kernel
 		LockGuard _(m_lock);
 
 		size_t result = first_data_page;
-		TRY(for_each_indirect_paddr_allocating(m_data_pages, [&] (paddr_t paddr, bool allocated) {
+		TRY(for_each_indirect_paddr_allocating(m_data_pages, [&] (paddr_t, bool allocated) {
 			if (allocated)
 				return BAN::Iteration::Break;
 			result++;
diff --git a/kernel/kernel/Memory/FileBackedRegion.cpp b/kernel/kernel/Memory/FileBackedRegion.cpp
index 1d09795b0d..6b6a001c8c 100644
--- a/kernel/kernel/Memory/FileBackedRegion.cpp
+++ b/kernel/kernel/Memory/FileBackedRegion.cpp
@@ -194,7 +194,7 @@ namespace Kernel
 		return true;
 	}
 
-	BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> FileBackedRegion::clone(PageTable& new_page_table)
+	BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> FileBackedRegion::clone(PageTable&)
 	{
 		ASSERT_NOT_REACHED();
 	}
diff --git a/kernel/kernel/Memory/kmalloc.cpp b/kernel/kernel/Memory/kmalloc.cpp
index eb3fa32ce0..6244361b66 100644
--- a/kernel/kernel/Memory/kmalloc.cpp
+++ b/kernel/kernel/Memory/kmalloc.cpp
@@ -289,8 +289,11 @@ static constexpr bool is_power_of_two(size_t value)
 	return (value & (value - 1)) == 0;
 }
 
-void* kmalloc(size_t size, size_t align, bool force_indentity_map)
+void* kmalloc(size_t size, size_t align, bool force_identity_map)
 {
+	// currently kmalloc is always identity mapped
+	(void)force_identity_map;
+
 	const kmalloc_info& info = s_kmalloc_info;
 
 	ASSERT(is_power_of_two(align));