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authorTony Battersby <tonyb@cybernetics.com>2023-01-27 00:51:18 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-05-06 20:33:36 +0300
commit290911c56f98ac7af9354108f3d16da5d6c5189c (patch)
treea01fe993d4e194400f1f9a8b4c4c35dd37ed166e /mm/dmapool.c
parent790233528d338f1467662761cf1e871086483ab8 (diff)
downloadlinux-290911c56f98ac7af9354108f3d16da5d6c5189c.tar.xz
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 Fixes: 2d55c16c0c54 ("dmapool: create/destroy cleanup") 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>
Diffstat (limited to 'mm/dmapool.c')
-rw-r--r--mm/dmapool.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/dmapool.c b/mm/dmapool.c
index ee993bb59fc2..eaed3ffb42aa 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -356,7 +356,7 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
break;
}
}
- if (!(mem_flags & __GFP_ZERO))
+ if (!want_init_on_alloc(mem_flags))
memset(retval, POOL_POISON_ALLOCATED, pool->size);
#endif
spin_unlock_irqrestore(&pool->lock, flags);