i'm attempting to rebuild centos51 kernel-xen. (fwiw, because pciback has NOT been compiled into the kernel, http://bugs.centos.org/view.php?id=2767) after, yum install kernel-devel kernel-xen-devel and usual, ln -s /usr/src/kernels/`uname -r`-`uname -m` /usr/src/linux cd /usr/src/linux cp /boot/config-`uname -r` ./.config make oldconfig make menuconfig ... next, make rpm fails at, scripts/kconfig/conf -s arch/x86_64/Kconfig make clean scripts/Makefile.clean:17: /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/amso1100/Makefile: No such file or directory make[5]: *** No rule to make target `/usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/amso1100/Makefile'. Stop. make[4]: *** [drivers/infiniband/hw/amso1100] Error 2 make[3]: *** [drivers/infiniband] Error 2 make[2]: *** [_clean_drivers] Error 2 make[1]: *** [rpm] Error 2 make: *** [rpm] Error 2 checking, ls -al \ /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/amso1100/Makefile \ /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/*/Makefile in fact *is* missing, /bin/ls: /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/amso1100/Makefile: No such file or directory -rw-r--r-- 1 root root 380 May 7 06:12 /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/cxgb3/Makefile -rw-r--r-- 1 root root 545 May 7 06:12 /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/ehca/Makefile -rw-r--r-- 1 root root 782 May 7 06:12 /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/ipath/Makefile -rw-r--r-- 1 root root 310 May 7 06:12 /usr/src/kernels/2.6.18-53.1.19.el5-xen-x86_64/drivers/infiniband/hw/mthca/Makefile installing & checking original/full SRPM, cd /usr/src/redhat/SRPMS wget http://mirror.centos.org/centos/5.1/updates/SRPMS/kernel-2.6.18-53.1.19.el5.src.rpm rpm -ivh kernel-2.6.18-53.1.19.el5.src.rpm it's also missing there, ls -al /usr/src/kernels/2.6.18-53.1.19.el5-x86_64/drivers/infiniband/hw/amso1100/Makefile /bin/ls: /usr/src/kernels/2.6.18-53.1.19.el5-x86_64/drivers/infiniband/hw/amso1100/Makefile: No such file or directory where can I get the 'Makefile'? thanks.