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| author | Samuel Holland <samuel.holland@sifive.com> | 2023-11-21 15:47:26 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-01-04 15:03:07 -0800 |
| commit | 62ff262227a45bf917fe198885ab7aa19be5a01f (patch) | |
| tree | a438b41277a2f4a9948808e0bd50111d28283e70 /arch/riscv/kernel/cpu-hotplug.c | |
| parent | 79093f3ec39c90edf4bd1a532d922ee6163441ec (diff) | |
| download | lwn-62ff262227a45bf917fe198885ab7aa19be5a01f.tar.gz lwn-62ff262227a45bf917fe198885ab7aa19be5a01f.zip | |
riscv: Use the same CPU operations for all CPUs
RISC-V provides no binding (ACPI or DT) to describe per-cpu start/stop
operations, so cpu_set_ops() will always detect the same operations for
every CPU. Replace the cpu_ops array with a single pointer to save space
and reduce boot time.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231121234736.3489608-4-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel/cpu-hotplug.c')
| -rw-r--r-- | arch/riscv/kernel/cpu-hotplug.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/riscv/kernel/cpu-hotplug.c b/arch/riscv/kernel/cpu-hotplug.c index 934eb64da0d0..28b58fc5ad19 100644 --- a/arch/riscv/kernel/cpu-hotplug.c +++ b/arch/riscv/kernel/cpu-hotplug.c @@ -18,7 +18,7 @@ bool cpu_has_hotplug(unsigned int cpu) { - if (cpu_ops[cpu]->cpu_stop) + if (cpu_ops->cpu_stop) return true; return false; @@ -31,7 +31,7 @@ int __cpu_disable(void) { unsigned int cpu = smp_processor_id(); - if (!cpu_ops[cpu] || !cpu_ops[cpu]->cpu_stop) + if (!cpu_ops->cpu_stop) return -EOPNOTSUPP; remove_cpu_topology(cpu); @@ -55,8 +55,8 @@ void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) pr_notice("CPU%u: off\n", cpu); /* Verify from the firmware if the cpu is really stopped*/ - if (cpu_ops[cpu]->cpu_is_stopped) - ret = cpu_ops[cpu]->cpu_is_stopped(cpu); + if (cpu_ops->cpu_is_stopped) + ret = cpu_ops->cpu_is_stopped(cpu); if (ret) pr_warn("CPU%d may not have stopped: %d\n", cpu, ret); } @@ -70,7 +70,7 @@ void __noreturn arch_cpu_idle_dead(void) cpuhp_ap_report_dead(); - cpu_ops[smp_processor_id()]->cpu_stop(); + cpu_ops->cpu_stop(); /* It should never reach here */ BUG(); } |