RISC-V: Do not invoke SBI call if cpumask is empty

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SBI calls are expensive. If cpumask is empty, there is no need to
trap via SBI as no remote tlb flushing is required.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>

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Atish Patra 2019-08-22 00:51:49 -07:00 • committed by Paul Walmsley

parent 00a5bf3a8c

commit 6384423f49

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arch/riscv/mm/tlbflush.c

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