linux-kernel - [PATCH] CodingStyle: add kmalloc

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Message-Id: <1334396894-27176-1-git-send-email-xi.wang@gmail.com>
Date:	Sat, 14 Apr 2012 05:48:14 -0400
From:	Xi Wang <xi.wang@...il.com>
To:	Randy Dunlap <rdunlap@...otime.net>
Cc:	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Xi Wang <xi.wang@...il.com>, Jesper Juhl <jj@...osbits.net>,
	Jens Axboe <axboe@...nel.dk>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>
Subject: [PATCH] CodingStyle: add kmalloc_array() to memory allocators

Add the new kmalloc_array() to the list of general-purpose memory
allocators in chapter 14.

Signed-off-by: Xi Wang <xi.wang@...il.com>
Cc: Jesper Juhl <jj@...osbits.net>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Dan Carpenter <dan.carpenter@...cle.com>
Cc: David Rientjes <rientjes@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Pekka Enberg <penberg@...nel.org>
---
 Documentation/CodingStyle |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle
index c58b236..cb9258b 100644
--- a/Documentation/CodingStyle
+++ b/Documentation/CodingStyle
@@ -671,8 +671,9 @@ ones already enabled by DEBUG.
 		Chapter 14: Allocating memory
 
 The kernel provides the following general purpose memory allocators:
-kmalloc(), kzalloc(), kcalloc(), vmalloc(), and vzalloc().  Please refer to
-the API documentation for further information about them.
+kmalloc(), kzalloc(), kmalloc_array(), kcalloc(), vmalloc(), and
+vzalloc().  Please refer to the API documentation for further information
+about them.
 
 The preferred form for passing a size of a struct is the following:
 
@@ -686,6 +687,17 @@ Casting the return value which is a void pointer is redundant. The conversion
 from void pointer to any other pointer type is guaranteed by the C programming
 language.
 
+The preferred form for allocating an array is the following:
+
+	p = kmalloc_array(n, sizeof(...), ...);
+
+The preferred form for allocating a zeroed array is the following:
+
+	p = kcalloc(n, sizeof(...), ...);
+
+Both forms check for overflow on the allocation size n * sizeof(...),
+and return NULL if that occurred.
+
 
 		Chapter 15: The inline disease
 
-- 
1.7.5.4

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