>the code in question is
>p = &root->child;
>for (;;) {
>> tmp = *p; <<
> if (!tmp || tmp->start > end) {
...
...
>the line "tmp = *p" essentially translates to "tmp = *&root->child"
>or "tmp = root->child"....so i think tmp will have a NULL val.
>then won't the "if" condition where tmp's member is being accessed
>"tmp->start" give a prob. (null pointer derefernce)???
if tmp == NULL, then !tmp in non zero , since the condition is 'or'
the control will not proceed to
'tmp->start > end'.
On Thu, 2004-10-07 at 16:43, Thekkedath, Gopakumar wrote:
> >struct resource *tmp, **p;
> ...
> >p = &root->child;
>
> >child member of root is NULL right??? cos it was'nt initialized
> >to any specfic val (so it wud have the default val. of NULL).
>
>
> As this is
> &root->child and not
> root->child, 'p' wont be NULL but the address of child
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