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I have installed 64 bit RHEL-5 (kernel version -2.6.18-92.el5) on my PC. now i am updating the kernel to 2.6.18-164..6.1.el5. i got following error:
[root@localhost linux]# cd /usr/src/linux
[root@localhost linux]# make
arch/x86_64/kernel/built-in.o: In function `alloc_iommu':
/usr/src/linux/arch/x86_64/kernel/pci-gart.c:94: undefined reference to `iommu_a rea_alloc'
/usr/src/linux/arch/x86_64/kernel/pci-gart.c:98: undefined reference to `iommu_a rea_alloc'
arch/x86_64/kernel/built-in.o: In function `free_iommu':
/usr/src/linux/arch/x86_64/kernel/pci-gart.c:122: undefined reference to `iommu_ area_free'
arch/x86_64/kernel/built-in.o: In function `pci_swiotlb_init':
/usr/src/linux/arch/x86_64/kernel/pci-swiotlb.c:35: undefined reference to `iomm u_pass_through'
arch/x86_64/kernel/built-in.o: In function `iommu_setup':
/usr/src/linux/arch/x86_64/kernel/pci-dma.c:277: undefined reference to `iommu_p ass_through'
make: *** [.tmp_vmlinux1] Error 1
Distribution: Ubuntu, RedHat, VMWare, CentOS, Windows, Android, Mac
To upgrade the kernel, I would download the RPM for the new kernel and do the regular rpm -ivh, and then reboot the server to boot into the new kernel. But this would work only if you have the Redhat Subscription.