linux-kernel - [PATCH v1 0/1] swiotlb: Clean up unused code if !CONFIG_DEBUG

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Message-Id: <cover.1681984708.git.petr.tesarik.ext@huawei.com>
Date:   Thu, 20 Apr 2023 11:58:57 +0200
From:   Petr Tesarik <petrtesarik@...weicloud.com>
To:     Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux.dev (open list:DMA MAPPING HELPERS),
        linux-kernel@...r.kernel.org (open list)
Cc:     Roberto Sassu <roberto.sassu@...wei.com>, petr@...arici.cz
Subject: [PATCH v1 0/1] swiotlb: Clean up unused code if !CONFIG_DEBUG_FS

From: Petr Tesarik <petr.tesarik.ext@...wei.com>

While verifying that the swiotlb high water marks are never used
if CONFIG_DEBUG_FS is unset, I guarded the corresponding fields
in strut io_tlb_mem with an #ifdef, but then I ran into a build
failure. This patch tries to clean up the optional debugfs code
in swiotlb.

The patch should be applied to the dma-mapping for-next tree.

Petr Tesarik (1):
  swiotlb: Omit total_used and used_hiwater if !CONFIG_DEBUG_FS

 include/linux/swiotlb.h |  2 ++
 kernel/dma/swiotlb.c    | 15 ++++++++++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

-- 
2.25.1