linux-kernel - Re: [PATCH 5/5] arch/x86/kernel: Drop memory allocation cast

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Date:	Wed, 12 May 2010 10:21:36 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	walter harms <wharms@....de>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	", H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 5/5] arch/x86/kernel: Drop memory allocation cast

From: Julia Lawall <julia@...u.dk>

Drop cast on the result of kmalloc and similar functions.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
@@

- (T *)
  (\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...))
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 arch/x86/kernel/tlb_uv.c            |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index 7fea555..217c361 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -1141,7 +1141,7 @@ uv_activation_descriptor_init(int node, int pnode)
 	 * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR)
 	 * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per uvhub
 	 */
-	bau_desc = (struct bau_desc *)kmalloc_node(sizeof(struct bau_desc)*
+	bau_desc = kmalloc_node(sizeof(struct bau_desc) *
 		UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node);
 	BUG_ON(!bau_desc);
 
@@ -1200,7 +1200,7 @@ uv_payload_queue_init(int node, int pnode)
 	struct bau_payload_queue_entry *pqp_malloc;
 	struct bau_control *bcp;
 
-	pqp = (struct bau_payload_queue_entry *) kmalloc_node(
+	pqp = kmalloc_node(
 		(DEST_Q_SIZE + 1) * sizeof(struct bau_payload_queue_entry),
 		GFP_KERNEL, node);
 	BUG_ON(!pqp);
@@ -1286,9 +1286,8 @@ static void uv_init_per_cpu(int nuvhubs)
 	};
 	struct uvhub_desc *uvhub_descs;
 
-	uvhub_descs = (struct uvhub_desc *)
-		kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL);
-	memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc));
+	uvhub_descs = kzalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL);
+	BUG_ON(!uvhub_descs);
 	for_each_present_cpu(cpu) {
 		bcp = &per_cpu(bau_control, cpu);
 		memset(bcp, 0, sizeof(struct bau_control));
--
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