From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes 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 Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- Documentation/ABI/testing/sysfs-devices-removable | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-devices-removable (limited to 'Documentation/ABI/testing/sysfs-devices-removable') diff --git a/Documentation/ABI/testing/sysfs-devices-removable b/Documentation/ABI/testing/sysfs-devices-removable new file mode 100644 index 000000000..754ecb458 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-removable @@ -0,0 +1,20 @@ +What: /sys/devices/.../removable +Date: May 2021 +Contact: Rajat Jain +Description: + Information about whether a given device can be removed from the + platform by the user. This is determined by its subsystem in a + bus / platform-specific way. This attribute is only present for + devices that can support determining such information: + + =========== =================================================== + "removable" device can be removed from the platform by the user + "fixed" device is fixed to the platform / cannot be removed + by the user. + "unknown" The information is unavailable / cannot be deduced. + =========== =================================================== + + Currently this is only supported by USB (which infers the + information from a combination of hub descriptor bits and + platform-specific data such as ACPI) and PCI (which gets this + from ACPI / device tree). -- cgit v1.3.1