Merge tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipgrafted

Pull futex fix from Ingo Molnar:

 - Also allocate a default private futex hash on vfork() as well, to
   avoid races with (private) futex waiters (Peter Zijlstra)

* tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Also allocate private hash on vfork()

1 files changed, 66 insertions, 0 deletions

diff --git a/include/sound/mixer_oss.h b/include/sound/mixer_oss.h
new file mode 100644
index 000000000..9a212c0ce
--- /dev/null
+++ b/include/sound/mixer_oss.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_MIXER_OSS_H
+#define __SOUND_MIXER_OSS_H
+
+/*
+ *  OSS MIXER API
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
+
+#define SNDRV_OSS_MAX_MIXERS	32
+
+struct snd_mixer_oss_file;
+
+struct snd_mixer_oss_slot {
+	int number;
+	unsigned int stereo: 1;
+	int (*get_volume)(struct snd_mixer_oss_file *fmixer,
+			  struct snd_mixer_oss_slot *chn,
+			  int *left, int *right);
+	int (*put_volume)(struct snd_mixer_oss_file *fmixer,
+			  struct snd_mixer_oss_slot *chn,
+			  int left, int right);
+	int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
+			  struct snd_mixer_oss_slot *chn,
+			  int *active);
+	int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
+			  struct snd_mixer_oss_slot *chn,
+			  int active);
+	unsigned long private_value;
+	void *private_data;
+	void (*private_free)(struct snd_mixer_oss_slot *slot);
+	int volume[2];
+};
+
+struct snd_mixer_oss {
+	struct snd_card *card;
+	char id[16];
+	char name[32];
+	struct snd_mixer_oss_slot slots[SNDRV_OSS_MAX_MIXERS]; /* OSS mixer slots */
+	unsigned int mask_recsrc;		/* exclusive recsrc mask */
+	int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
+			  unsigned int *active_index);
+	int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
+			  unsigned int active_index);
+	void *private_data_recsrc;
+	void (*private_free_recsrc)(struct snd_mixer_oss *mixer);
+	struct mutex reg_mutex;
+	struct snd_info_entry *proc_entry;
+	int oss_dev_alloc;
+	/* --- */
+	int oss_recsrc;
+};
+
+struct snd_mixer_oss_file {
+	struct snd_card *card;
+	struct snd_mixer_oss *mixer;
+};
+
+int snd_mixer_oss_ioctl_card(struct snd_card *card,
+			     unsigned int cmd, unsigned long arg);
+
+#endif /* CONFIG_SND_MIXER_OSS */
+
+#endif /* __SOUND_MIXER_OSS_H */