Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 01/14] pch_uart: drop double zeroing | Date | Sun, 20 Sep 2020 13:26:13 +0200 |
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sg_init_table zeroes its first argument, so the allocation of that argument doesn't have to.
the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @@ expression x,n,flags; @@
x = - kcalloc + kmalloc_array (n,sizeof(struct scatterlist),flags) ... sg_init_table(x,n) // </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
--- drivers/tty/serial/pch_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff -u -p a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -981,7 +981,7 @@ static unsigned int dma_handle_tx(struct priv->tx_dma_use = 1; - priv->sg_tx_p = kcalloc(num, sizeof(struct scatterlist), GFP_ATOMIC); + priv->sg_tx_p = kmalloc_array(num, sizeof(struct scatterlist), GFP_ATOMIC); if (!priv->sg_tx_p) { dev_err(priv->port.dev, "%s:kzalloc Failed\n", __func__); return 0;
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