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, 26 insertions, 0 deletions

diff --git a/include/sound/simple_card.h b/include/sound/simple_card.h
new file mode 100644
index 000000000..2e999916d
--- /dev/null
+++ b/include/sound/simple_card.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * ASoC simple sound card support
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ */
+
+#ifndef __SIMPLE_CARD_H
+#define __SIMPLE_CARD_H
+
+#include <sound/soc.h>
+#include <sound/simple_card_utils.h>
+
+struct simple_util_info {
+	const char *name;
+	const char *card;
+	const char *codec;
+	const char *platform;
+
+	unsigned int daifmt;
+	struct simple_util_dai cpu_dai;
+	struct simple_util_dai codec_dai;
+};
+
+#endif /* __SIMPLE_CARD_H */