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drivers:net: dma_alloc_coherent: use __GFP_ZERO instead of memset(, 0)

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Reduce the number of calls required to alloc
a zeroed block of memory.

Trivially reduces overall object size.

Other changes around these removals
o Neaten call argument alignment
o Remove an unnecessary OOM message after dma_alloc_coherent failure
o Remove unnecessary gfp_t stack variable

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches 2013-03-15 07:23:58 +00:00 • committed by David S. Miller
parent 7f9421c264
commit 1f9061d27d
38 changed files with 104 additions and 168 deletions
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8
drivers/net/ethernet/broadcom/bcm63xx_enet.c
View file

@ -862,25 +862,25 @@ static int bcm_enet_open(struct net_device *dev)
/* allocate rx dma ring */
size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma,
GFP_KERNEL | __GFP_ZERO);
if (!p) {
ret = -ENOMEM;
goto out_freeirq_tx;
}
memset(p, 0, size);
priv->rx_desc_alloc_size = size;
priv->rx_desc_cpu = p;
/* allocate tx dma ring */
size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma,
GFP_KERNEL | __GFP_ZERO);
if (!p) {
ret = -ENOMEM;
goto out_free_rx_ring;
}
memset(p, 0, size);
priv->tx_desc_alloc_size = size;
priv->tx_desc_cpu = p;