From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- drivers/acpi/acpi_ffh.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/acpi/acpi_ffh.c (limited to 'drivers/acpi/acpi_ffh.c') diff --git a/drivers/acpi/acpi_ffh.c b/drivers/acpi/acpi_ffh.c new file mode 100644 index 000000000..8d5126963 --- /dev/null +++ b/drivers/acpi/acpi_ffh.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Author: Sudeep Holla + * Copyright 2022 Arm Limited + */ +#include +#include +#include +#include +#include + +static struct acpi_ffh_info ffh_ctx; + +int __weak acpi_ffh_address_space_arch_setup(void *handler_ctxt, + void **region_ctxt) +{ + return -EOPNOTSUPP; +} + +int __weak acpi_ffh_address_space_arch_handler(acpi_integer *value, + void *region_context) +{ + return -EOPNOTSUPP; +} + +static acpi_status +acpi_ffh_address_space_setup(acpi_handle region_handle, u32 function, + void *handler_context, void **region_context) +{ + return acpi_ffh_address_space_arch_setup(handler_context, + region_context); +} + +static acpi_status +acpi_ffh_address_space_handler(u32 function, acpi_physical_address addr, + u32 bits, acpi_integer *value, + void *handler_context, void *region_context) +{ + return acpi_ffh_address_space_arch_handler(value, region_context); +} + +void __init acpi_init_ffh(void) +{ + acpi_status status; + + status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, + ACPI_ADR_SPACE_FIXED_HARDWARE, + &acpi_ffh_address_space_handler, + &acpi_ffh_address_space_setup, + &ffh_ctx); + if (ACPI_FAILURE(status)) + pr_alert("OperationRegion handler could not be installed\n"); +} -- cgit v1.3.1