Re: signed size_t ?

[Måns Rullgård]

Christoph Lameter <cl@xxxxxxxxx> writes:

> On Tue, 11 Dec 2012, kbuild test robot wrote:
>
>> mm/slab_common.c: In function 'create_boot_cache':
>> mm/slab_common.c:219:6: warning: format '%zd' expects argument of type 'signed size_t', but argument 3 has type 'size_t' [-Wformat]
>
> We already changed that once from %td to %zd so that the size_t works
> correctly.

If the argument is correctly of type size_t, the format should be '%zu'
since size_t is unsigned.

> Does a signed size_t make any sense?

A signed type corresponding to size_t sometimes makes sense and it's
called ssize_t.

-- 
Måns Rullgård
mans@xxxxxxxxx
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