diff --git a/kernel.spec b/kernel.spec
index 5566992..09d8c81 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -21,7 +21,7 @@
 
 # Don't parametrize this, it's a check to avoid build a kernel without having
 # edited the obsoletes needed for multiple kernel support
-%define KERNEL_OBSOLETES_ARE_FOR_VERSION 4.4.20
+%define KERNEL_OBSOLETES_ARE_FOR_VERSION 4.4.23
 
 #% define kernel_longterm 1
 %define kernel_MAJver %(echo %version | cut -d. -f1)
@@ -87,7 +87,7 @@
 %define _use_internal_dependency_generator 1
 
 Name:          kernel
-Version:       4.4.20
+Version:       4.4.23
 Release:       1mamba
 Summary:       The Linux Kernel, the operating system core itself
 Group:         System/Kernel and Hardware
@@ -211,6 +211,7 @@ Provides:      kernel = %{version}
 Obsoletes:     kernel-%{KERNEL_TARGET} < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET} = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}
@@ -229,6 +230,7 @@ Obsoletes:     kernel-alsa-devel
 Obsoletes:     kernel-%{KERNEL_TARGET}-source < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET}-source = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-source
@@ -245,6 +247,7 @@ Provides:      kernelheaders = %{version}
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET}-headers = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-headers
@@ -260,6 +263,7 @@ Provides:      kernelsanitisedheaders = %{version}
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET}-headers-sanitised = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-headers-sanitised
@@ -276,6 +280,7 @@ Requires:      kernel-%{KERNEL_TARGET} == %{version}-%{release}
 Obsoletes:     kernel-%{KERNEL_TARGET}-sound < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET}-sound = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 
 %description %{KERNEL_TARGET}-sound
@@ -293,6 +298,7 @@ Requires:      iwlwifi-firmware
 Obsoletes:     kernel-%{KERNEL_TARGET}-wireless < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET}-wireless = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 Requires:      crda
 
@@ -309,6 +315,7 @@ Requires:      kernel-%{KERNEL_TARGET} == %{version}-%{release}
 Obsoletes:     kernel-%{KERNEL_TARGET}-firmware < 3.10
 Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.8
 Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.15
+Obsoletes:     kernel-%{KERNEL_TARGET}-firmware = %{kernel_majver}.20
 ## KERNELOBSOLETES-END
 Provides:      linux_firmware
 
@@ -681,17 +688,17 @@ echo "%{_prefix}/src/linux-%{kernel_ver}%{?KERNEL_TARGET}/arch/$headers_arch" >>
    %{_builddir}/kernel-%{kernel_ver}%{?KERNEL_TARGET}/kernel-headers.files
 
 # install sanitised headers used by glibc
-%ifarch x86_64
-ARCH=%{target_cpu} make headers_install \
-   HOSTCC=%{_build}-gcc \
-   CROSS_COMPILE=%{_target_platform}- \
-   INSTALL_HDR_PATH=%{buildroot}%{_prefix}/src/linux-%{kernel_ver}%{KERNEL_TARGET}/usr
-%else
+#% ifarch x86_64
+#ARCH=%{target_cpu} make headers_install \
+#   HOSTCC=%{_build}-gcc \
+#   CROSS_COMPILE=%{_target_platform}- \
+#   INSTALL_HDR_PATH=%{buildroot}%{_prefix}/src/linux-%{kernel_ver}%{KERNEL_TARGET}/usr
+#% else
 ARCH=%{target_cpu} make headers_install \
    HOSTCC=%{_target_platform}-gcc \
    CROSS_COMPILE=%{_target_platform}- \
    INSTALL_HDR_PATH=%{buildroot}%{_prefix}/src/linux-%{kernel_ver}%{KERNEL_TARGET}/usr
-%endif
+#% endif
 
 # from kernel 3.0.4 patch
 rm -f %{buildroot}/usr/src/linux-%{kernel_ver}%{?KERNEL_TARGET}/MAINTAINERS.orig
@@ -1036,6 +1043,9 @@ exit 0
 /lib/firmware/*
 
 %changelog
+* Sun Oct 02 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 4.4.23-1mamba
+- update to 4.4.23
+
 * Fri Sep 09 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 4.4.20-1mamba
 - update to 4.4.20