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, 21 insertions, 0 deletions

diff --git a/drivers/clk/aspeed/Kconfig b/drivers/clk/aspeed/Kconfig
new file mode 100644
index 000000000..ef50481c3
--- /dev/null
+++ b/drivers/clk/aspeed/Kconfig
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config COMMON_CLK_ASPEED
+        bool "Clock driver for Aspeed BMC SoCs"
+        depends on ARCH_ASPEED || COMPILE_TEST
+        default ARCH_ASPEED
+        select MFD_SYSCON
+        select RESET_CONTROLLER
+        help
+          This driver supports the SoC clocks on the Aspeed BMC platforms.
+
+          The G4 and G5 series, including the ast2400 and ast2500, are supported
+          by this driver.
+
+config COMMON_CLK_AST2700
+        bool "Clock driver for AST2700 SoC"
+        depends on ARCH_ASPEED || COMPILE_TEST
+        help
+          This driver provides support for clock on AST2700 SoC.
+          The driver is responsible for managing the various clocks required
+          by the peripherals and cores within the AST2700.