When booting an arm64 kernel w/initrd using UEFI/grub, use of mem= will likely cut off part or all of the initrd. This leaves it outside the kernel linear map which leads to failure when unpacking. The x86 code has a similar need to relocate an initrd outside of mapped memory in some cases. The current x86 code uses early_memremap() to copy the original initrd from unmapped to mapped RAM. This patchset creates a generic copy_from_early_mem() utility based on that x86 code and has arm64 use it to relocate the initrd if necessary. Mark Salter (2): mm: add utility for early copy from unmapped ram arm64: support initrd outside kernel linear map arch/arm64/kernel/setup.c | 55 +++++++++++++++++++++++++++++++++++++ include/asm-generic/early_ioremap.h | 6 ++++ mm/early_ioremap.c | 22 +++++++++++++++ 3 files changed, 83 insertions(+) -- 2.4.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>