diff options
| author | Helge Deller <deller@gmx.de> | 2024-02-05 10:39:20 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2024-02-07 00:13:21 +0100 |
| commit | 82b143aeb169b8b55798d7d2063032e1a6ceeeb0 (patch) | |
| tree | b2a1e876773ad2c8f6d58b27bedf18aebe5f1b1e /arch/parisc/kernel | |
| parent | 54be6c6c5ae8e0d93a6c4641cb7528eb0b6ba478 (diff) | |
Revert "parisc: Only list existing CPUs in cpu_possible_mask"
This reverts commit 0921244f6f4f0d05698b953fe632a99b38907226.
It broke CPU hotplugging because it modifies the __cpu_possible_mask
after bootup, so that it will be different than nr_cpu_ids, which
then effictively breaks the workqueue setup code and triggers crashes
when shutting down CPUs at runtime.
Guenter was the first who noticed the wrong values in __cpu_possible_mask,
since the cpumask Kunit tests were failig.
Reverting this commit fixes both issues, but sadly brings back this
uncritical runtime warning:
register_cpu_capacity_sysctl: too early to get CPU4 device!
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lkml.org/lkml/2024/2/4/146
Link: https://lore.kernel.org/lkml/Zb0mbHlIud_bqftx@slm.duckdns.org/t/
Cc: stable@vger.kernel.org # 6.0+
Diffstat (limited to 'arch/parisc/kernel')
| -rw-r--r-- | arch/parisc/kernel/processor.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c index e95a977ba5f3..bf73562706b2 100644 --- a/arch/parisc/kernel/processor.c +++ b/arch/parisc/kernel/processor.c @@ -172,7 +172,6 @@ static int __init processor_probe(struct parisc_device *dev) p->cpu_num = cpu_info.cpu_num; p->cpu_loc = cpu_info.cpu_loc; - set_cpu_possible(cpuid, true); store_cpu_topology(cpuid); #ifdef CONFIG_SMP @@ -474,13 +473,6 @@ static struct parisc_driver cpu_driver __refdata = { */ void __init processor_init(void) { - unsigned int cpu; - reset_cpu_topology(); - - /* reset possible mask. We will mark those which are possible. */ - for_each_possible_cpu(cpu) - set_cpu_possible(cpu, false); - register_parisc_driver(&cpu_driver); } |