sound: oss: remove last sleep_on users

There are three files in oss for which I could not find an easy way to
replace interruptible_sleep_on_timeout with a non-racy version. This
patch instead just adds a private implementation of the function, now
named oss_broken_sleep_on, and changes over the remaining users in
sound/oss/ so we can remove the global interface.

[fixed coding style warnings by tiwai]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 18 insertions, 0 deletions

diff --git a/sound/oss/sleep.h b/sound/oss/sleep.h
new file mode 100644
index 0000000..a20fc92
--- /dev/null
+++ b/sound/oss/sleep.h
@@ -0,0 +1,18 @@
+#include <linux/wait.h>
+
+/*
+ * Do not use. This is a replacement for the old
+ * "interruptible_sleep_on_timeout" function that has been
+ * deprecated for ages. All users should instead try to use
+ * wait_event_interruptible_timeout.
+ */
+
+static inline long
+oss_broken_sleep_on(wait_queue_head_t *q, long timeout)
+{
+	DEFINE_WAIT(wait);
+	prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE);
+	timeout = schedule_timeout(timeout);
+	finish_wait(q, &wait);
+	return timeout;
+}