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From: viresh.kumar@st.com (Viresh Kumar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3 04/20] dmaengine/amba-pl08x: pass (*ptr) to sizeof() instead of (struct xyz)
Date: Fri, 5 Aug 2011 15:32:29 +0530	[thread overview]
Message-ID: <064fabdf1ceca5437e6df8c94e3d4cd1538e7c41.1312538034.git.viresh.kumar@st.com> (raw)
In-Reply-To: <cover.1312538034.git.viresh.kumar@st.com>

As mentioned in Documentation/CodingStyle,

The preferred form for passing a size of a struct is the following:
   p = kmalloc(sizeof(*p), ...);

The alternative form where struct name is spelled out hurts readability and
introduces an opportunity for a bug when the pointer variable type is changed
but the corresponding sizeof that is passed to a memory allocator is not.

This patch replaces (struct xyz) with *ptr at several occurrences in driver.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
---
 drivers/dma/amba-pl08x.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 8e2056b..01c2f50 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1293,7 +1293,7 @@ static int pl08x_prep_channel_resources(struct pl08x_dma_chan *plchan,
 static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan,
 	unsigned long flags)
 {
-	struct pl08x_txd *txd = kzalloc(sizeof(struct pl08x_txd), GFP_NOWAIT);
+	struct pl08x_txd *txd = kzalloc(sizeof(*txd), GFP_NOWAIT);
 
 	if (txd) {
 		dma_async_tx_descriptor_init(&txd->tx, &plchan->chan);
@@ -1690,7 +1690,7 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
 	 * to cope with that situation.
 	 */
 	for (i = 0; i < channels; i++) {
-		chan = kzalloc(sizeof(struct pl08x_dma_chan), GFP_KERNEL);
+		chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 		if (!chan) {
 			dev_err(&pl08x->adev->dev,
 				"%s no memory for channel\n", __func__);
@@ -1850,7 +1850,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 		return ret;
 
 	/* Create the driver state holder */
-	pl08x = kzalloc(sizeof(struct pl08x_driver_data), GFP_KERNEL);
+	pl08x = kzalloc(sizeof(*pl08x), GFP_KERNEL);
 	if (!pl08x) {
 		ret = -ENOMEM;
 		goto out_no_pl08x;
@@ -1929,7 +1929,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 	}
 
 	/* Initialize physical channels */
-	pl08x->phy_chans = kmalloc((vd->channels * sizeof(struct pl08x_phy_chan)),
+	pl08x->phy_chans = kmalloc((vd->channels * sizeof(*pl08x->phy_chans)),
 			GFP_KERNEL);
 	if (!pl08x->phy_chans) {
 		dev_err(&adev->dev, "%s failed to allocate "
-- 
1.7.2.2

  parent reply	other threads:[~2011-08-05 10:02 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-05 10:02 [PATCH V3 00/20] dmaengine/amba-pl08x updates Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 01/20] ARM: asm/pl080.h: Protect against multiple inclusion of header file Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 02/20] dmaengine/amba-pl08x: Resolve formatting issues Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 03/20] dmaengine/amba-pl08x: Rearrange inclusion of header files in ascending order Viresh Kumar
2011-08-05 10:02 ` Viresh Kumar [this message]
2011-08-05 10:02 ` [PATCH V3 05/20] dmaengine/amba-pl08x: Complete doc comment for struct pl08x_txd Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 06/20] dmaengine/amba-pl08x: Remove redundant comment and rewrite original Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 07/20] dmaengine/amba-pl08x: Changing few prints to dev_dbg from dev_info Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 08/20] dmaengine/amba-pl08x: support runtime PM Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 09/20] dmaengine/amba-pl08x: Simplify pl08x_ensure_on() Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 10/20] dmaengine/amba-pl08x: No need to check "ch->signal < 0" Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 11/20] dmaengine/amba-pl08x: Schedule tasklet in case of error interrupt Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 12/20] dmaengine/amba-pl08x: Get rid of pl08x_pre_boundary() Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 13/20] dmaengine/amba-pl08x: max_bytes_per_lli is TRANSFER_SIZE * src_width (not MIN(width)) Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 14/20] dmaengine/amba-pl08x: Add prep_single_byte_llis() routine Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 15/20] dmaengine/amba-pl08x: Align lli_len to max(src.width, dst.width) Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 16/20] dmaengine/amba-pl08x: Choose peripheral bus as master bus Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 17/20] dmaengine/amba-pl08x: Pass flow controller information with slave channel data Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 18/20] dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 19/20] dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool Viresh Kumar
2011-08-05 10:02 ` [PATCH V3 20/20] dmaengine/amba-pl08x: Call pl08x_free_txd() instead of calling kfree() directly Viresh Kumar
2011-08-23  8:17 ` [PATCH V3 00/20] dmaengine/amba-pl08x updates Linus Walleij
2011-08-25 14:06   ` Koul, Vinod

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