[uml-devel] [PATCH 3/8] UML - audio driver locking

[uml-devel] [PATCH 3/8] UML - audio driver locking

[Jeff Dike]

Comment the lack of locking and make a couple of variables static.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
--
 arch/um/drivers/hostaudio_kern.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

Index: linux-2.6.18-mm/arch/um/drivers/hostaudio_kern.c
===================================================================
--- linux-2.6.18-mm.orig/arch/um/drivers/hostaudio_kern.c	2006-12-29 18:25:36.000000000 -0500
+++ linux-2.6.18-mm/arch/um/drivers/hostaudio_kern.c	2006-12-29 21:09:09.000000000 -0500
@@ -25,9 +25,12 @@ struct hostmixer_state {
 #define HOSTAUDIO_DEV_DSP "/dev/sound/dsp"
 #define HOSTAUDIO_DEV_MIXER "/dev/sound/mixer"
 
-/* Only changed from linux_main at boot time */
-char *dsp = HOSTAUDIO_DEV_DSP;
-char *mixer = HOSTAUDIO_DEV_MIXER;
+/* Changed either at boot time or module load time.  At boot, this is
+ * single-threaded; at module load, multiple modules would each have
+ * their own copy of these variables.
+ */
+static char *dsp = HOSTAUDIO_DEV_DSP;
+static char *mixer = HOSTAUDIO_DEV_MIXER;
 
 #define DSP_HELP \
 "    This is used to specify the host dsp device to the hostaudio driver.\n" \


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