| Message ID | 20240412143719.11398-2-Jonathan.Cameron@huawei.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | ACPI/arm64: add support for virtual cpu hotplug | expand |
On Fri, Apr 12, 2024 at 4:37 PM Jonathan Cameron <Jonathan.Cameron@huawei.com> wrote: > > For arm64 the CPU registration cannot complete until the ACPI intepretter > us up and running so in those cases the arch specific > arch_register_cpu() will return -EPROBE_DEFER at this stage and the > registration will be attempted later. > > Suggested-by: Rafael J. Wysocki <rafael@kernel.org> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Rafael J. Wysocki <rafael@kernel.org> > --- > v5: New patch. > Note that for now no arch_register_cpu() calls return -EPROBE_DEFER > so it has no impact until the arm64 one is added later in this series. > --- > drivers/base/cpu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c > index 56fba44ba391..b9d0d14e5960 100644 > --- a/drivers/base/cpu.c > +++ b/drivers/base/cpu.c > @@ -558,7 +558,7 @@ static void __init cpu_dev_register_generic(void) > > for_each_present_cpu(i) { > ret = arch_register_cpu(i); > - if (ret) > + if (ret != -EPROBE_DEFER) > pr_warn("register_cpu %d failed (%d)\n", i, ret); > } > } > -- > 2.39.2 >
On 4/13/24 00:37, Jonathan Cameron wrote: > For arm64 the CPU registration cannot complete until the ACPI intepretter > us up and running so in those cases the arch specific ^^ typo: s/us/is > arch_register_cpu() will return -EPROBE_DEFER at this stage and the > registration will be attempted later. > > Suggested-by: Rafael J. Wysocki <rafael@kernel.org> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > > --- > v5: New patch. > Note that for now no arch_register_cpu() calls return -EPROBE_DEFER > so it has no impact until the arm64 one is added later in this series. > --- > drivers/base/cpu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Reviewed-by: Gavin Shan <gshan@redhat.com>
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 56fba44ba391..b9d0d14e5960 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -558,7 +558,7 @@ static void __init cpu_dev_register_generic(void) for_each_present_cpu(i) { ret = arch_register_cpu(i); - if (ret) + if (ret != -EPROBE_DEFER) pr_warn("register_cpu %d failed (%d)\n", i, ret); } }
For arm64 the CPU registration cannot complete until the ACPI intepretter us up and running so in those cases the arch specific arch_register_cpu() will return -EPROBE_DEFER at this stage and the registration will be attempted later. Suggested-by: Rafael J. Wysocki <rafael@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- v5: New patch. Note that for now no arch_register_cpu() calls return -EPROBE_DEFER so it has no impact until the arm64 one is added later in this series. --- drivers/base/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)