[PATCH 3/8] UML - audio driver locking
From: Jeff Dike
Date: Mon Jan 01 2007 - 14:53:40 EST
Comment the lack of locking and make a couple of variables static.
Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxx>
--
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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