Asking for KFREE is as silly as asking for a macro to check if kmalloc
succeeded for a pointer, else return ENOMEM.
#define CKMALLOC(p,x) \
do { \
p = kmalloc(x, GFP_KERNEL); \
if(!p) return -ENOMEM; \
} while(0)
On 1/8/07, Amit Choudhary <[email protected]> wrote:
--- Pekka Enberg <[email protected]> wrote:
> On 1/8/07, Hua Zhong <[email protected]> wrote:
> > > And as I explained, it can result in longer code too. So, why
> > > keep this value around. Why not re-initialize it to NULL.
> >
> > Because initialization increases code size.
>
> And it also effectively blocks the slab debugging code from doing its
> job detecting double-frees.
>
Man, so you do want someone to set 'x' to NULL after freeing it, so that the slab debugging code
can catch double frees. If you set it to NULL then double free is harmless. So, you want something
harmful in the system and then debug it with the slab debugging code. Man, doesn't make sense to
me.
-Amit
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