linux-kernel - Re: dma-mapping commit breaks UML

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Message-Id: <20100930144059N.fujita.tomonori@lab.ntt.co.jp>
Date:	Thu, 30 Sep 2010 14:45:19 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	toralf.foerster@....de
Cc:	fujita.tomonori@....ntt.co.jp, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: dma-mapping commit breaks UML

On Wed, 29 Sep 2010 16:29:38 +0200
Toralf **UNKNOWN CHARSET** <toralf.foerster@....de> wrote:

> but catched another compile error - how can I now automatically
> git-bisect for that wrong commit w/o heavy scripting ? - Or simply
> asking who to blame wrt this compile error ?

Fortunately, looks like we can easily figure out the root cause of
this (commit d6d1b650ae6acce73d55dd0246de22180303ae73), the last
commit to arch/um/drivers/hostaudio_kern.c

The following patch works?

diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 0c46e39..63c740a 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -40,6 +40,11 @@ static char *mixer = HOSTAUDIO_DEV_MIXER;
 "    This is used to specify the host mixer device to the hostaudio driver.\n"\
 "    The default is \"" HOSTAUDIO_DEV_MIXER "\".\n\n"
 
+module_param(dsp, charp, 0644);
+MODULE_PARM_DESC(dsp, DSP_HELP);
+module_param(mixer, charp, 0644);
+MODULE_PARM_DESC(mixer, MIXER_HELP);
+
 #ifndef MODULE
 static int set_dsp(char *name, int *add)
 {
@@ -56,15 +61,6 @@ static int set_mixer(char *name, int *add)
 }
 
 __uml_setup("mixer=", set_mixer, "mixer=<mixer device>\n" MIXER_HELP);
-
-#else /*MODULE*/
-
-module_param(dsp, charp, 0644);
-MODULE_PARM_DESC(dsp, DSP_HELP);
-
-module_param(mixer, charp, 0644);
-MODULE_PARM_DESC(mixer, MIXER_HELP);
-
 #endif
 
 /* /dev/dsp file operations */
--
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