swiotlb: checking whether swiotlb buffer is full with io_tlb_used

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This patch uses io_tlb_used to help check whether swiotlb buffer is full.
io_tlb_used is no longer used for only debugfs. It is also used to help
optimize swiotlb_tbl_map_single().

Suggested-by: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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Dongli Zhang 2019-01-18 15:10:28 +08:00 • committed by Konrad Rzeszutek Wilk

parent 71602fe6d4

commit 60513ed06a

1 changed files with 4 additions and 0 deletions

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kernel/dma/swiotlb.c

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