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-rw-r--r-- | Documentation/CodingStyle | 16 |
1 files changed, 14 insertions, 2 deletions
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. | |||
671 | Chapter 14: Allocating memory | 671 | Chapter 14: Allocating memory |
672 | 672 | ||
673 | The kernel provides the following general purpose memory allocators: | 673 | The kernel provides the following general purpose memory allocators: |
674 | kmalloc(), kzalloc(), kcalloc(), vmalloc(), and vzalloc(). Please refer to | 674 | kmalloc(), kzalloc(), kmalloc_array(), kcalloc(), vmalloc(), and |
675 | the API documentation for further information about them. | 675 | vzalloc(). Please refer to the API documentation for further information |
676 | about them. | ||
676 | 677 | ||
677 | The preferred form for passing a size of a struct is the following: | 678 | The preferred form for passing a size of a struct is the following: |
678 | 679 | ||
@@ -686,6 +687,17 @@ Casting the return value which is a void pointer is redundant. The conversion | |||
686 | from void pointer to any other pointer type is guaranteed by the C programming | 687 | from void pointer to any other pointer type is guaranteed by the C programming |
687 | language. | 688 | language. |
688 | 689 | ||
690 | The preferred form for allocating an array is the following: | ||
691 | |||
692 | p = kmalloc_array(n, sizeof(...), ...); | ||
693 | |||
694 | The preferred form for allocating a zeroed array is the following: | ||
695 | |||
696 | p = kcalloc(n, sizeof(...), ...); | ||
697 | |||
698 | Both forms check for overflow on the allocation size n * sizeof(...), | ||
699 | and return NULL if that occurred. | ||
700 | |||
689 | 701 | ||
690 | Chapter 15: The inline disease | 702 | Chapter 15: The inline disease |
691 | 703 | ||