swiotlb: fix passing local variable to debugfs_create_ulong()

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Debugfs node will be run-timely checked and so local variable
should be not passed to debugfs_create_ulong(). Fix it via
debugfs_create_file() to create io_tlb_used node and calculate
used io tlb number with fops_io_tlb_used attribute.

Fixes: 20347fca71 ("swiotlb: split up the global swiotlb lock")
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Tianyu Lan 2022-07-28 03:24:20 -04:00 • committed by Christoph Hellwig

parent 8419702489

commit 5c850d3188

1 changed files with 9 additions and 3 deletions

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kernel/dma/swiotlb.c

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