[PATCH] powerpc/kexec_file: account hot-pluggable memory while estimating FDT size

[Michael Ellerman]

Sourabh Jain <sourabhjain at linux.ibm.com> writes:
> On Systems where online memory is lesser compared to max memory, the
> kexec_file_load system call may fail to load the kdump kernel with the
> below errors:
>
>     "Failed to update fdt with linux,drconf-usable-memory property"
>     "Error setting up usable-memory property for kdump kernel"
>
> This happens because the size estimation for usable memory properties
> for the kdump kernel's FDT is based on the online memory whereas the
> usable memory properties include max memory. In short, the hot-pluggable
> memory is not accounted for while estimating the size of the usable
> memory properties.
>
> The issue is addressed by calculating usable memory property size using
> max hotplug address instead of the last online memory address.
>
> Fixes: 2377c92e37fe ("powerpc/kexec_file: fix FDT size estimation for kdump kernel")
> Signed-off-by: Sourabh Jain <sourabhjain at linux.ibm.com>
> ---
>  arch/powerpc/kexec/file_load_64.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Can you please rebase it on top of the fix I posted.

http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20230130014707.541110-1-mpe@ellerman.id.au/

cheers