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dma-mapping: remove a pointless memset in dma_atomic_pool_init

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We already zero the memory after allocating it from the pool that
this function fills, and having the memset here in this form means
we can't support CMA highmem allocations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Russell King - ARM Linux <linux@armlinux.org.uk>
This commit is contained in:
Christoph Hellwig
2018-12-04 08:04:31 -08:00
parent 48cc8f7a1d
commit 20b105feda
1 changed files with 0 additions and 1 deletions
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kernel/dma/remap.c
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@@ -121,7 +121,6 @@ int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot)
if (!page)
goto out;
memset(page_address(page), 0, atomic_pool_size);
arch_dma_prep_coherent(page, atomic_pool_size);
atomic_pool = gen_pool_create(PAGE_SHIFT, -1);