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RISC-V: Use a local variable instead of smp_processor_id() 

Store the smp_processor_id() in a local variable to save some
pointer chasing.

Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Greentime Hu 2020-06-22 16:47:25 -07:00 committed by Palmer Dabbelt
parent 234e9d7a62
commit a2693fe254
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GPG Key ID: 2E1319F35FBB1889
1 changed files with 4 additions and 3 deletions
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7
arch/riscv/kernel/smpboot.c
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@ -146,6 +146,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
asmlinkage __visible void smp_callin(void)
{
struct mm_struct *mm = &init_mm;
unsigned int curr_cpuid = smp_processor_id();
if (!IS_ENABLED(CONFIG_RISCV_SBI))
clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id()));
@ -155,9 +156,9 @@ asmlinkage __visible void smp_callin(void)
current->active_mm = mm;
trap_init();
notify_cpu_starting(smp_processor_id());
update_siblings_masks(smp_processor_id());
set_cpu_online(smp_processor_id(), 1);
notify_cpu_starting(curr_cpuid);
update_siblings_masks(curr_cpuid);
set_cpu_online(curr_cpuid, 1);
/*
* Remote TLB flushes are ignored while the CPU is offline, so emit
* a local TLB flush right now just in case.