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CodingStyle: add kmalloc_array() to memory allocators

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

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Acked-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Xi Wang 2012-05-31 16:26:04 -07:00 committed by Linus Torvalds
parent 1cefe28f95
commit 15837294d4
1 changed files with 14 additions and 2 deletions
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@ -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