Hi Mark, As a heads-up, it looks like you missed a space when sending this; Arnd and Ard got merged into: "Arnd Bergmann <arnd@xxxxxxxx>--cc=Ard Biesheuvel" <ard.biesheuvel@xxxxxxxxxx> I've corrected that for this reply. On Tue, Jul 28, 2015 at 03:32:39PM +0100, Mark Salter wrote: > 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. This sounds like a sane idea to me. > 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(+) Any reason for not moving x86 over to the new generic version? Mark. -- 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>