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dmapool: speedup DMAPOOL_DEBUG with init_on_alloc 

Avoid double-memset of the same allocated memory in dma_pool_alloc() when
both DMAPOOL_DEBUG is enabled and init_on_alloc=1.

Link: https://lkml.kernel.org/r/20230126215125.4069751-6-kbusch@meta.com
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Tony Battersby 2023-01-26 13:51:18 -08:00 committed by Andrew Morton
parent 347e4e44c0
commit 19f5045840
1 changed files with 1 additions and 1 deletions
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2
mm/dmapool.c
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@ -356,7 +356,7 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
break; break;
} }
} }
if (!(mem_flags & __GFP_ZERO)) if (!want_init_on_alloc(mem_flags))
memset(retval, POOL_POISON_ALLOCATED, pool->size); memset(retval, POOL_POISON_ALLOCATED, pool->size);
#endif #endif
spin_unlock_irqrestore(&pool->lock, flags); spin_unlock_irqrestore(&pool->lock, flags);