Re: [PATCH 5/6] syscalls: add define syscall prefix macro

Jason Baron
2010-02-08T15:49:50Z

On Wed, Feb 03, 2010 at 02:01:04PM +0100, Heiko Carstens wrote:
> On Tue, Feb 02, 2010 at 04:21:55PM -0500, Jason Baron wrote:
> > Add a new 'SYSCALL_PREFIX_DEFINE#()' style macro to include/linux/syscalls.h.
> > This allows us to create syscalls via:
> >
> > SYSCALL_PREFIX_DEFINE1(32_, mmap, struct mmap_arg_struct __user *, arg);
> >
> > The standard 'SYSCALL_DEFINE#()' macro forces 'sys_blah', but for the 32 compat
> > calls we want 'sys32_blah'.
>
> Not really. That's what you want for x86. But the generic name for compat syscalls
> is compat_sys_whatever. The arch specific compat syscalls don't follow a common
> naming scheme (yet).
> Especially if you consider the idea to get automated correct sign extension via
> hpa's planned script for compat syscalls it would be good if you would just name
> that define something like SYSCALL_COMPAT.. or COMPAT_SYSCALL..
> That way it would be easy to add a hook in there.

So I was trying to keep the names of the arch ia32 compat sys calls the
same, ie 'sys32_blah'. However, I agree a common naming scheme makes
more sense. what about 'arch_compat_sys_blah'? So as to distinguish from
the common compat syscalls 'compat_sys_blah'.

thanks,

-Jason