| Date | Mon, 18 Sep 2023 13:33:37 +1000 | Subject | Re: [RFC PATCH v2 05/35] drivers: base: Print a warning instead of panic() when register_cpu() fails | From | Gavin Shan <> |
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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@arm.com> > --- > 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
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