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/admin-guide/abi-stable.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 Documentation/admin-guide/abi-stable.rst (limited to 'Documentation/admin-guide/abi-stable.rst') diff --git a/Documentation/admin-guide/abi-stable.rst b/Documentation/admin-guide/abi-stable.rst new file mode 100644 index 000000000..528c68401 --- /dev/null +++ b/Documentation/admin-guide/abi-stable.rst @@ -0,0 +1,16 @@ +.. SPDX-License-Identifier: GPL-2.0 + +ABI stable symbols +================== + +Documents the interfaces that the developer has defined to be stable. + +Userspace programs are free to use these interfaces with no +restrictions, and backward compatibility for them will be guaranteed +for at least 2 years. + +Most interfaces (like syscalls) are expected to never change and always +be available. + +.. kernel-abi:: stable + :no-files: -- cgit v1.3.1