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last dma-mapping fix for Linux 7.0

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A fix for DMA-mapping subsystem, which hides annoying, false-positive
 warnings from DMA-API debug on coherent platforms like x86_64 (Mikhail
 Gavrilov).
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Merge tag 'dma-mapping-7.0-2026-04-09' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux

Pull dma-mapping fix from Marek Szyprowski:
 "A fix for DMA-mapping subsystem, which hides annoying, false-positive
  warnings from DMA-API debug on coherent platforms like x86_64 (Mikhail
  Gavrilov)"

* tag 'dma-mapping-7.0-2026-04-09' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
  dma-debug: suppress cacheline overlap warning when arch has no DMA alignment requirement
This commit is contained in:
Linus Torvalds 2026-04-09 11:02:35 -07:00
commit 3ffcd57823
1 changed files with 1 additions and 0 deletions
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1
kernel/dma/debug.c
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@ -615,6 +615,7 @@ static void add_dma_entry(struct dma_debug_entry *entry, unsigned long attrs)
} else if (rc == -EEXIST &&
!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
!(entry->is_cache_clean && overlap_cache_clean) &&
dma_get_cache_alignment() >= L1_CACHE_BYTES &&
!(IS_ENABLED(CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC) &&
is_swiotlb_active(entry->dev))) {
err_printk(entry->dev, entry,