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author | Xi Wang <xi.wang@gmail.com> | 2012-05-31 16:26:04 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-31 17:49:26 -0700 |
commit | 15837294d4ce717f69942f7366e99d4d1d3d9923 (patch) | |
tree | 41a7047f7f4bf3747fa162aaeec6a1e0a18fd848 /Documentation/CodingStyle | |
parent | 1cefe28f95da307287a05a6a0c10213f01055e2a (diff) | |
download | linux-3.10-15837294d4ce717f69942f7366e99d4d1d3d9923.tar.gz linux-3.10-15837294d4ce717f69942f7366e99d4d1d3d9923.tar.bz2 linux-3.10-15837294d4ce717f69942f7366e99d4d1d3d9923.zip |
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@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>
Diffstat (limited to 'Documentation/CodingStyle')
-rw-r--r-- | Documentation/CodingStyle | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle index c58b236bbe0..cb9258b8fd3 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 |