KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted

Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.

Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/include/sound/wm8993.h b/include/sound/wm8993.h
new file mode 100644
index 000000000..8cf9de85d
--- /dev/null
+++ b/include/sound/wm8993.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/sound/wm8993.h -- Platform data for WM8993
+ *
+ * Copyright 2009 Wolfson Microelectronics. PLC.
+ */
+
+#ifndef __LINUX_SND_WM8993_H
+#define __LINUX_SND_WM8993_H
+
+/* Note that EQ1 only contains the enable/disable bit so will be
+   ignored but is included for simplicity.
+ */
+struct wm8993_retune_mobile_setting {
+	const char *name;
+	unsigned int rate;
+	u16 config[24];
+};
+
+struct wm8993_platform_data {
+	struct wm8993_retune_mobile_setting *retune_configs;
+	int num_retune_configs;
+
+	/* LINEOUT can be differential or single ended */
+	unsigned int lineout1_diff:1;
+	unsigned int lineout2_diff:1;
+
+	/* Common mode feedback */
+	unsigned int lineout1fb:1;
+	unsigned int lineout2fb:1;
+
+	/* Delay to add for microphones to stabalise after power up */
+	int micbias1_delay;
+	int micbias2_delay;
+
+	/* Microphone biases: 0=0.9*AVDD1 1=0.65*AVVD1 */
+	unsigned int micbias1_lvl:1;
+	unsigned int micbias2_lvl:1;
+
+	/* Jack detect threshold levels, see datasheet for values */
+	unsigned int jd_scthr:2;
+	unsigned int jd_thr:2;
+};
+
+#endif