linux-kernel - [PATCH v1 1/1] swiotlb: remove unused field "used" from struct io_tlb

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Date:   Tue,  6 Jun 2023 14:46:25 +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>,
        Kefeng Wang <wangkefeng.wang@...wei.com>, petr@...arici.cz
Subject: [PATCH v1 1/1] swiotlb: remove unused field "used" from struct io_tlb_mem

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

Commit 20347fca71a3 ("swiotlb: split up the global swiotlb lock") moved
the number of used slots to struct io_tlb_area, but it did not remove
the field from struct io_tlb_mem.

Signed-off-by: Petr Tesarik <petr.tesarik.ext@...wei.com>
---
 include/linux/swiotlb.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 7af2673b47ba..4e52cd5e0bdc 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -76,7 +76,6 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
  * @nslabs:	The number of IO TLB blocks (in groups of 64) between @start and
  *		@end. For default swiotlb, this is command line adjustable via
  *		setup_io_tlb_npages.
- * @used:	The number of used IO TLB block.
  * @list:	The free list describing the number of free entries available
  *		from each index.
  * @orig_addr:	The original address corresponding to a mapped entry.
@@ -98,7 +97,6 @@ struct io_tlb_mem {
 	phys_addr_t end;
 	void *vaddr;
 	unsigned long nslabs;
-	unsigned long used;
 	struct dentry *debugfs;
 	bool late_alloc;
 	bool force_bounce;
-- 
2.25.1