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| author | James Morse <james.morse@arm.com> | 2023-11-21 14:45:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-06 04:41:50 +0100 |
| commit | 96cf2036514acec9bee7c25ca61badc64820d734 (patch) | |
| tree | 4530cea7e0a2aa16540aa2cf0147de5d152aca22 /arch/riscv/kernel/setup.c | |
| parent | LoongArch: convert to use arch_cpu_is_hotpluggable() (diff) | |
| download | linux-96cf2036514acec9bee7c25ca61badc64820d734.tar.xz linux-96cf2036514acec9bee7c25ca61badc64820d734.zip | |
riscv: Switch over to GENERIC_CPU_DEVICES
Now that GENERIC_CPU_DEVICES calls arch_register_cpu(), which can be
overridden by the arch code, switch over to this to allow common code
to choose when the register_cpu() call is made.
This allows topology_init() to be removed.
This is an intermediate step to the logic being moved to drivers/acpi,
where GENERIC_CPU_DEVICES will do the work when booting with acpi=off.
This patch also has the effect of moving the registration of CPUs from
subsys to driver core initialisation, prior to any initcalls running.
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Tested-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/E1r5R4G-00Ct0M-PS@rmk-PC.armlinux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/riscv/kernel/setup.c')
| -rw-r--r-- | arch/riscv/kernel/setup.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 535a837de55d..b3a0aa2b78d5 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -51,7 +51,6 @@ atomic_t hart_lottery __section(".sdata") #endif ; unsigned long boot_cpu_hartid; -static DEFINE_PER_CPU(struct cpu, cpu_devices); /* * Place kernel memory regions on the resource tree so that @@ -299,23 +298,13 @@ void __init setup_arch(char **cmdline_p) riscv_user_isa_enable(); } -static int __init topology_init(void) +int arch_register_cpu(int cpu) { - int i, ret; + struct cpu *c = &per_cpu(cpu_devices, cpu); - for_each_possible_cpu(i) { - struct cpu *cpu = &per_cpu(cpu_devices, i); - - cpu->hotpluggable = cpu_has_hotplug(i); - ret = register_cpu(cpu, i); - if (unlikely(ret)) - pr_warn("Warning: %s: register_cpu %d failed (%d)\n", - __func__, i, ret); - } - - return 0; + c->hotpluggable = cpu_has_hotplug(cpu); + return register_cpu(c, cpu); } -subsys_initcall(topology_init); void free_initmem(void) { |