On Wed, 27 Mar 2002, Andrew Morton wrote:
> In 2.5.7 there is a thinko in the allocation and initialisation
> of the fs-private superblock for ext2. It's passing the wrong type
> to the sizeof operator (which of course gives the wrong size)
> when allocating and clearing the memory.
> Lesson for the day: this is one of the reasons why this idiom:
>
> some_type *p;
>
> p = malloc(sizeof(*p));
> ...
> memset(p, 0, sizeof(*p));
>
> is preferable to
>
> some_type *p;
>
> p = malloc(sizeof(some_type));
> ...
> memset(p, 0, sizeof(some_type));
... however, there is a lot of reasons why the former is preferable.
For one thing, the latter is hell on any search. Moreover, I would
argue that memset() on a structure is not a good idea - better do
the explicit initialization.
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This archive was generated by hypermail 2b29 : Sun Mar 31 2002 - 22:00:16 EST