On 9/14/23 02:37, James Morse wrote:
loongarch, mips, parisc, riscv and sh all print a warning if
register_cpu() returns an error. Architectures that use
GENERIC_CPU_DEVICES call panic() instead.
Errors in this path indicate something is wrong with the firmware
description of the platform, but the kernel is able to keep running.
Downgrade this to a warning to make it easier to debug this issue.
This will allow architectures that switching over to GENERIC_CPU_DEVICES
to drop their warning, but keep the existing behaviour.
Signed-off-by: James Morse <james.morse@xxxxxxx>
---
drivers/base/cpu.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 579064fda97b..d31c936f0955 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -535,14 +535,15 @@ int __weak arch_register_cpu(int cpu)
static void __init cpu_dev_register_generic(void)
{
- int i;
+ int i, ret;
if (!IS_ENABLED(CONFIG_GENERIC_CPU_DEVICES))
return;
for_each_present_cpu(i) {
- if (arch_register_cpu(i))
- panic("Failed to register CPU device");
+ ret = arch_register_cpu(i);
+ if (ret)
+ pr_warn("register_cpu %d failed (%d)\n", i, ret);
}
}
The same warning message has been printed by arch/loongarch/kernel/topology.c::arch_register_cpu().
In order to avoid the duplication, I think the warning message in arch/loongarch needs to be dropped?
Thanks,
Gavin
