From bdab18633a302c82b5e5d5dbc4e38b0baf9c0837 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 20 Sep 2026 08:15:23 -0700 Subject: Merge tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull futex fix from Ingo Molnar: - Also allocate a default private futex hash on vfork() as well, to avoid races with (private) futex waiters (Peter Zijlstra) * tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Also allocate private hash on vfork() --- arch/x86/lib/cache-smp.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 arch/x86/lib/cache-smp.c (limited to 'arch/x86/lib/cache-smp.c') diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c new file mode 100644 index 000000000..7d3edd6de --- /dev/null +++ b/arch/x86/lib/cache-smp.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +static void __wbinvd(void *dummy) +{ + wbinvd(); +} + +void wbinvd_on_cpu(int cpu) +{ + smp_call_function_single(cpu, __wbinvd, NULL, 1); +} +EXPORT_SYMBOL_FOR_KVM(wbinvd_on_cpu); + +void wbinvd_on_all_cpus(void) +{ + on_each_cpu(__wbinvd, NULL, 1); +} +EXPORT_SYMBOL(wbinvd_on_all_cpus); + +void wbinvd_on_cpus_mask(struct cpumask *cpus) +{ + on_each_cpu_mask(cpus, __wbinvd, NULL, 1); +} +EXPORT_SYMBOL_FOR_KVM(wbinvd_on_cpus_mask); + +static void __wbnoinvd(void *dummy) +{ + wbnoinvd(); +} + +void wbnoinvd_on_all_cpus(void) +{ + on_each_cpu(__wbnoinvd, NULL, 1); +} +EXPORT_SYMBOL_FOR_KVM(wbnoinvd_on_all_cpus); + +void wbnoinvd_on_cpus_mask(struct cpumask *cpus) +{ + on_each_cpu_mask(cpus, __wbnoinvd, NULL, 1); +} +EXPORT_SYMBOL_FOR_KVM(wbnoinvd_on_cpus_mask); -- cgit v1.3.1