swiotlb: use the atomic counter of total used slabs if available

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If DEBUG_FS is enabled, the cost of keeping an exact number of total
used slabs is already paid. In this case, there is no reason to use an
inexact number for statistics and kernel messages.

Signed-off-by: Petr Tesarik <petr.tesarik.ext@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Petr Tesarik 2023-06-07 11:04:18 +02:00 • committed by Christoph Hellwig

parent efa76afdde

commit 693405cf11

1 changed files with 11 additions and 0 deletions

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kernel/dma/swiotlb.c

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