Alan Cox wrote:
> > Does kmalloc() make any guarantees of the alignment of allocated
> > blocks? Will the returned block always be 4-, 8- or 16-byte
> > aligned, for example?
> There are people who assume 16byte alignment guarantees. I dont
> think anyone has formally specified the guarantee beyond 4 bytes tho
What does "formally specified" mean?
As far as I know, you can count on 16-bytes alignment from
kmalloc. The trouble is that you would have to keep the original
pointer and free that if you have to do the "round" yourself.
I once wrote a kmalloc(*) that would allow you to free any pointer
inside the kmalloc-ed area. This is dangerous as freeing a random
pointer is more likely to "work". But in this case it would be very
convenient.
Roger.
(*) Too buggy for anyone but me.
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