On Thu, 28 Jan, at 12:07:33PM, Ard Biesheuvel wrote:
> The EFI stub is typically built into the decompressor (x86, ARM) so none
> of its symbols are annotated as __init. However, on arm64, the stub is
> linked into the kernel proper, and the code is __init annotated at the
> section level by prepending all names of SHF_ALLOC sections with '.init'.
>
> This results in section names like .init.rodata.str1.8 (for string literals)
> and .init.bss (which is tiny), both of which can be moved into the .init.data
> output section.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> ---
> arch/arm64/kernel/vmlinux.lds.S | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
> index e3928f578891..cbf4db440e9c 100644
> --- a/arch/arm64/kernel/vmlinux.lds.S
> +++ b/arch/arm64/kernel/vmlinux.lds.S
> @@ -134,6 +134,7 @@ SECTIONS
> CON_INITCALL
> SECURITY_INITCALL
> INIT_RAM_FS
> + *(.init.rodata.* .init.bss) /* from the EFI stub */
> }
> .exit.data : {
> ARM_EXIT_KEEP(EXIT_DATA)
FWIW,
Reviewed-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
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