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| author | Palmer Dabbelt <palmer@sifive.com> | 2018-10-02 22:14:57 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2018-10-23 03:03:36 +0300 |
| commit | b18d6f05252d6b3f725c08d8831a46b003df5b6b (patch) | |
| tree | 89b13303185ca549479c91e2d4d9ea02857d70c8 /arch/riscv | |
| parent | 19ccf29bb18f08a4583aa899a8cc8c11e5ea85a6 (diff) | |
| download | linux-b18d6f05252d6b3f725c08d8831a46b003df5b6b.tar.xz | |
RISC-V: Comment on the TLB flush in smp_callin()
This isn't readily apparent from reading the code.
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
[Atish: code comment formatting update]
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/kernel/smpboot.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c index 56abab6a9812..712e9ca85904 100644 --- a/arch/riscv/kernel/smpboot.c +++ b/arch/riscv/kernel/smpboot.c @@ -106,6 +106,10 @@ asmlinkage void __init smp_callin(void) trap_init(); notify_cpu_starting(smp_processor_id()); set_cpu_online(smp_processor_id(), 1); + /* + * Remote TLB flushes are ignored while the CPU is offline, so emit + * a local TLB flush right now just in case. + */ local_flush_tlb_all(); local_irq_enable(); preempt_disable(); |