[PATCH v2] ARM: DMA: Fix kzalloc flags in __dma_alloc

On Fri, Mar 18, 2016 at 06:28:49PM +0900, Alexandre Courbot wrote:

Commit 19e6e5e5392b ("ARM: 8547/1: dma-mapping: store buffer
information") allocates a structure meant for internal buffer management
with the GFP flags of the buffer itself. This can trigger the following
safeguard in the slab/slub allocator:

	if (unlikely(flags & GFP_SLAB_BUG_MASK)) {
		pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK);
		BUG();
	}

Fix this by filtering the flags that make the slab allocator unhappy.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Rabin Vincent <redacted>

Looks much better than the original.  Please send it to the patch system,
thanks.

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