linux-kernel - wait_for_initramfs warning from kernel_init

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Message-ID: <c197724b-3d16-45bd-d71b-0a016196ca40@gmail.com>
Date:   Thu, 29 Apr 2021 08:46:33 +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: wait_for_initramfs warning from kernel_init_freeable()

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()