> From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Date: Fri, 6 Jul 2012 09:18:52 +0200
> On Fri, Jul 6, 2012 at 3:12 AM, Hans-Peter Nilsson
> <hans-peter.nilsson@xxxxxxxx> wrote:
> > Um, no, ssize_t isn't long. Do you mean __kernel_ssize_t?
>
> In the kernel, (s)size_t == __kernel_(s)size_t
Right, sorry for being slow.
> OK, so (s)size_t should be (unsigned) int for Linux.
Both the the kernel and userspace, yes.
> Probably the "long" dates from the time people used cris-axis-elf
> instead of cris-axis-linux-gnu, and "__SIZE_TYPE" from the time
> people started using cris-axis-linux-gnu?
I don't remember. I have a vague recollection of a change in
the distant past.
> Ah, yes, commit ac505a9fd19c99fdb622fe4896446f995151babc
> ("[PATCH] CRIS architecture update for 2.5.74") in full-history-linux
> changed size_t from "unsigned long" to __SIZE_TYPE, but didn't
> update ssize_t. Probably "signed __SIZE_TYPE" doesn't work?
Well no. Remember here it's "unsigned int": "signed unsigned
int" doesn't compile very well.
> So I guess they should be changed to (explicit) "unsigned int", resp.
> "int". Or does it make sense to retain __SIZE_TYPE?
I think it'd make sense to use __SIZE_TYPE__ (don't forget the
trailing "__") for *all* targets that don't have a particular
difference between kernel and userspace ABI's (notable
exceptions being those with use 32-bit user and 64-bit kernel
ABIs). Unfortunately, there's no __SSIZE_TYPE__.
brgds, H-P
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