Re: [PATCH v4] x86/setup: get ramdisk parameters only once

[Ingo Molnar <mingo@kernel.org>]

* Alexander Kuleshov <kuleshovmail@gmail.com> wrote:

>  void __init setup_arch(char **cmdline_p)
>  {
> +	struct ramdisk ramdisk_image = {
> +		.start_addr = get_ramdisk_image(),
> +		.size  = get_ramdisk_size(),
> +		.reserve_ramdisk = true
> +	};
> +
> +	/* Assume only end is not page aligned */
> +	ramdisk_image.end_addr = PAGE_ALIGN(ramdisk_image.start_addr + ramdisk_image.size),
> +
>  	memblock_reserve(__pa_symbol(_text),
>  			 (unsigned long)__bss_stop - (unsigned long)_text);
>  
> -	early_reserve_initrd();
> +	if (!boot_params.hdr.type_of_loader || !ramdisk_image.start_addr
> +		|| !ramdisk_image.size)

Don't do pointless line breaks.

> +		ramdisk_image.reserve_ramdisk = false;	/* No initrd provided by bootloader */
> +	else
> +		memblock_reserve(ramdisk_image.start_addr,
> +				ramdisk_image.end_addr - ramdisk_image.start_addr);

There's a simpler way to write that line ...

>  	/*
>  	 * At this point everything still needed from the boot loader
> @@ -1135,7 +1137,8 @@ void __init setup_arch(char **cmdline_p)
>  	/* Allocate bigger log buffer */
>  	setup_log_buf(1);
>  
> -	reserve_initrd();
> +	if (ramdisk_image.reserve_ramdisk)
> +		reserve_initrd(&ramdisk_image);

It's cleaner to make that check inside reserve_initrd() ...

Thanks,

	Ingo