linux-ext4 - Re: [PATCH RESEND 05/62] init: remove "ramdisk_start" command line parameter, which controls starting block number of initrd

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Message-ID: <fe3aea1c-24eb-49f4-9ce3-8f132d8814be@csgroup.eu>
Date: Mon, 15 Sep 2025 13:48:08 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Askar Safin <safinaskar@...il.com>, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
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Subject: Re: [PATCH RESEND 05/62] init: remove "ramdisk_start" command line
 parameter, which controls starting block number of initrd

Have a simpler subject,

Le 13/09/2025 à 02:37, Askar Safin a écrit :
> [Vous ne recevez pas souvent de courriers de safinaskar@...il.com. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ]
> 
> This is preparation for initrd removal

and make a more interesting message.

For me it would make more sense to remove ramdisk_start and ramdisk_size 
at the same time.

Christophe

> 
> Signed-off-by: Askar Safin <safinaskar@...il.com>
> ---
>   Documentation/admin-guide/blockdev/ramdisk.rst  | 3 +--
>   Documentation/admin-guide/kernel-parameters.txt | 2 --
>   init/do_mounts_rd.c                             | 7 -------
>   3 files changed, 1 insertion(+), 11 deletions(-)
> 
> diff --git a/Documentation/admin-guide/blockdev/ramdisk.rst b/Documentation/admin-guide/blockdev/ramdisk.rst
> index 9ce6101e8dd9..e57c61108dbc 100644
> --- a/Documentation/admin-guide/blockdev/ramdisk.rst
> +++ b/Documentation/admin-guide/blockdev/ramdisk.rst
> @@ -74,12 +74,11 @@ arch/x86/boot/Makefile.
> 
>   Some of the kernel command line boot options that may apply here are::
> 
> -  ramdisk_start=N
>     ramdisk_size=M
> 
>   If you make a boot disk that has LILO, then for the above, you would use::
> 
> -       append = "ramdisk_start=N ramdisk_size=M"
> +       append = "ramdisk_size=M"
> 
>   4) An Example of Creating a Compressed RAM Disk
>   -----------------------------------------------
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index f940c1184912..07e8878f1e13 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -5285,8 +5285,6 @@
>          ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
>                          See Documentation/admin-guide/blockdev/ramdisk.rst.
> 
> -       ramdisk_start=  [RAM] RAM disk image start address
> -
>          random.trust_cpu=off
>                          [KNL,EARLY] Disable trusting the use of the CPU's
>                          random number generator (if available) to
> diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
> index 8e0a774a9c6f..864fa88d9f89 100644
> --- a/init/do_mounts_rd.c
> +++ b/init/do_mounts_rd.c
> @@ -17,13 +17,6 @@
>   static struct file *in_file, *out_file;
>   static loff_t in_pos, out_pos;
> 
> -static int __init ramdisk_start_setup(char *str)
> -{
> -       /* will be removed in next commit */
> -       return 1;
> -}
> -__setup("ramdisk_start=", ramdisk_start_setup);
> -
>   static int __init crd_load(decompress_fn deco);
> 
>   /*
> --
> 2.47.2
> 
>