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Message-ID: <4d6aa2dd-92df-4f36-10ac-cd003a0229f7@gmail.com>
Date:   Thu, 29 Apr 2021 09:16:18 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Luis Chamberlain <mcgrof@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: wait_for_initramfs warning from kernel_init_freeable()

On 29.04.2021 08:46, Heiner Kallweit wrote:
> Since 97f8172f9a98 ("init/initramfs.c: do unpacking asynchronously") I get
> the following warning early in the boot process from umh:
> "wait_for_initramfs() called before rootfs_initcalls"
> Some debugging lead me to the following call chain:
> 
> kernel_init_freeable()
> -> do_basic_setup()
>    -> driver_init()
>       -> platform_bus_init()
>          -> bus_register()
>             -> kset_register()
>                -> kobject_uvent()
> 

Sorry, this is the first umh call, but at this time UMH_DISABLED is still set.
The first umh call where UMH is enabled is the following:

kernel_init_freeable()
-> do_basic_setup()
   -> do_initcalls()
      -> do_one_initcall()
         -> wq_sysfs_init()         <- core_initcall()
            -> subsys_virtual_register()
               -> bus_register()

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