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Revert "dma-debug: avoid deadlock between dma debug vs printk and netconsole"

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This reverts commit a4688d6248.
This commit is contained in:
Ksawlii 2024-11-24 00:23:48 +01:00
parent 4b0722c93f
commit 481b3fc579
1 changed files with 1 additions and 4 deletions
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5
kernel/dma/debug.c
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@ -447,11 +447,8 @@ void debug_dma_dump_mappings(struct device *dev)
* dma_active_cacheline entry to track per event. dma_map_sg(), on the
* other hand, consumes a single dma_debug_entry, but inserts 'nents'
* entries into the tree.
*
* Use __GFP_NOWARN because the printk from an OOM, to netconsole, could end
* up right back in the DMA debugging code, leading to a deadlock.
*/
static RADIX_TREE(dma_active_cacheline, GFP_ATOMIC | __GFP_NOWARN);
static RADIX_TREE(dma_active_cacheline, GFP_ATOMIC);
static DEFINE_SPINLOCK(radix_lock);
#define ACTIVE_CACHELINE_MAX_OVERLAP ((1 << RADIX_TREE_MAX_TAGS) - 1)
#define CACHELINE_PER_PAGE_SHIFT (PAGE_SHIFT - L1_CACHE_SHIFT)