diff options
| author | Prakash, Prashanth <pprakash@codeaurora.org> | 2017-03-24 00:21:53 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-04-18 17:50:24 +0300 |
| commit | 35b68735988447485074cfa862710e49c082c013 (patch) | |
| tree | 744a792bd55dc12b6122ab28fb08ff8db52482d9 /drivers/acpi | |
| parent | 4f7d029b9bf009fbee76bb10c0c4351a1870d2f3 (diff) | |
| download | linux-35b68735988447485074cfa862710e49c082c013.tar.xz | |
ACPI / Processor: Drop setup_max_cpus check from acpi_processor_add()
When maxcpus=X kernel argument is used, we parse the ACPI tables only
for the first X cpus. The per-cpu ACPI data include the _PSD tables
which gives information about related cpus.
cppc_cpufreq and acpi-cpufreq parses the table once during init to
deduce the related cpus. If a user brings a new cpu online after boot
the related cpu data becomes incorrect.
acpi_get_psd_map() in acpi_cppc.c returns error if it fails to find
the parsed ACPI data for possible CPU resulting in cppc_cpufreq
initialization failure.
With this change we will probe all possible CPUs prior to cpufreq
initialization, but will bring only setup_max_cpus online. nr_cpus
kernel parameter can be used to restict even parsing per-cpu ACPI
tables.
Signed-off-by: Prashanth Prakash <pprakash@codeaurora.org>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpi_processor.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 0143135b3abe..f098e25b6b41 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -388,11 +388,6 @@ static int acpi_processor_add(struct acpi_device *device, if (result) /* Processor is not physically present or unavailable */ return 0; -#ifdef CONFIG_SMP - if (pr->id >= setup_max_cpus && pr->id != 0) - return 0; -#endif - BUG_ON(pr->id >= nr_cpu_ids); /* |