From 15837294d4ce717f69942f7366e99d4d1d3d9923 Mon Sep 17 00:00:00 2001 From: Xi Wang Date: Thu, 31 May 2012 16:26:04 -0700 Subject: 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 Acked-by: Jesper Juhl Acked-by: Pekka Enberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/CodingStyle | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'Documentation/CodingStyle') diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle index c58b236bbe04..cb9258b8fd35 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 -- cgit v1.2.3-59-g8ed1b