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swiotlb: bail out of swiotlb_init_late() if swiotlb is already allocated
If swiotlb is allocated, immediately return 0, so callers do not have to check io_tlb_default_mem.nslabs explicitly. Signed-off-by: Petr Tesarik <petr.tesarik.ext@huawei.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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Petr Tesarik
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Christoph Hellwig
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Aug 1, 2023
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