linux-kernel - Re: [PATCH] rpmsg bus subsys_initcall initialization ordering

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Date:	Mon, 16 Jul 2012 10:47:03 +0300
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Federico Fuga <fuga@...diofuga.com>
Cc:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH] rpmsg bus subsys_initcall initialization ordering

Hi Federico,

On Fri, Jul 13, 2012 at 9:00 PM, Ohad Ben-Cohen <ohad@...ery.com> wrote:
> I agree. I'll take it, but will change the commit log to make it
> omaprpc-agnostic.

Here's what I'm going to apply:

commit 913552b8c7a0f06cc1bff27f8e9953bffe6a1817
Author: Federico Fuga <fuga@...diofuga.com>
Date:   Mon Jul 16 10:36:51 2012 +0300

    rpmsg: fix dependency on initialization order

    When rpmsg drivers are built into the kernel, they must not initialize
    before the rpmsg bus does, otherwise they'd trigger a BUG() in
    drivers/base/driver.c line 169 (driver_register()).

    To fix that, and to stop depending on arbitrary linkage ordering of
    those built-in rpmsg driver, we let the rpmsg bus initialize at
    subsys_initcall.

    Signed-off-by: Federico Fuga <fuga@...diofuga.com>
    [ohad: rewrite the commit log]
    Signed-off-by: Ohad Ben-Cohen <ohad@...ery.com>

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 0af7fd3..e564a01 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -1104,7 +1104,7 @@ static int __init rpmsg_init(void)

        return ret;
 }
-module_init(rpmsg_init);
+subsys_initcall(rpmsg_init);

 static void __exit rpmsg_fini(void)
 {
--
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