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 --- include/asm-generic/syscalls.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 include/asm-generic/syscalls.h (limited to 'include/asm-generic/syscalls.h') diff --git a/include/asm-generic/syscalls.h b/include/asm-generic/syscalls.h new file mode 100644 index 000000000..fabcefe8a --- /dev/null +++ b/include/asm-generic/syscalls.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_SYSCALLS_H +#define __ASM_GENERIC_SYSCALLS_H + +#include +#include + +/* + * Calling conventions for these system calls can differ, so + * it's possible to override them. + */ + +#ifndef sys_mmap2 +asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff); +#endif + +#ifndef sys_mmap +asmlinkage long sys_mmap(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long off); +#endif + +#ifndef sys_rt_sigreturn +asmlinkage long sys_rt_sigreturn(struct pt_regs *regs); +#endif + +#endif /* __ASM_GENERIC_SYSCALLS_H */ -- cgit v1.3.1