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Code Issues Releases Wiki Activity

dmapool: don't memset on free twice 

If debug is enabled, dmapool will poison the range, so no need to clear it
to 0 immediately before writing over it.

Link: https://lkml.kernel.org/r/20230126215125.4069751-11-kbusch@meta.com
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Keith Busch 2023-01-26 13:51:23 -08:00 committed by Andrew Morton
parent 887aef6158
commit 9d062a8a4c
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
mm/dmapool.c
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@ -160,6 +160,8 @@ static void pool_check_block(struct dma_pool *pool, void *retval,
static bool pool_page_err(struct dma_pool *pool, struct dma_page *page,
void *vaddr, dma_addr_t dma)
{
if (want_init_on_free())
memset(vaddr, 0, pool->size);
return false;
}
@ -441,8 +443,6 @@ void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma)
return;
}
if (want_init_on_free())
memset(vaddr, 0, pool->size);
if (pool_page_err(pool, page, vaddr, dma)) {
spin_unlock_irqrestore(&pool->lock, flags);
return;