diff options
| author | Prashanth Prakash <pprakash@codeaurora.org> | 2017-01-26 11:08:32 -0700 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2017-01-27 11:30:36 +0000 |
| commit | 606f42265d384b9149bfb953c5dfc6d4710fef4c (patch) | |
| tree | d9f4f42760984c6dabc2b4220bfc72652591a824 /tools/lib/bpf | |
| parent | 7a308bb3016f57e5be11a677d15b821536419d36 (diff) | |
arm64: skip register_cpufreq_notifier on ACPI-based systems
On ACPI based systems where the topology is setup using the API
store_cpu_topology, at the moment we do not have necessary code
to parse cpu capacity and handle cpufreq notifier, thus
resulting in a kernel panic.
Stack:
init_cpu_capacity_callback+0xb4/0x1c8
notifier_call_chain+0x5c/0xa0
__blocking_notifier_call_chain+0x58/0xa0
blocking_notifier_call_chain+0x3c/0x50
cpufreq_set_policy+0xe4/0x328
cpufreq_init_policy+0x80/0x100
cpufreq_online+0x418/0x710
cpufreq_add_dev+0x118/0x180
subsys_interface_register+0xa4/0xf8
cpufreq_register_driver+0x1c0/0x298
cppc_cpufreq_init+0xdc/0x1000 [cppc_cpufreq]
do_one_initcall+0x5c/0x168
do_init_module+0x64/0x1e4
load_module+0x130c/0x14d0
SyS_finit_module+0x108/0x120
el0_svc_naked+0x24/0x28
Fixes: 7202bde8b7ae ("arm64: parse cpu capacity-dmips-mhz from DT")
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'tools/lib/bpf')