Re: [PATCH] unify sys_pipe implementation

[Linus Torvalds <torvalds@linux-foundation.org>]

On Sat, 3 May 2008, Ulrich Drepper wrote:
> 
> +#ifdef __ARCH_WANT_SYS_PIPE
> +/*
> + * sys_pipe() is the normal C calling standard for creating
> + * a pipe. It's not the way Unix traditionally does this, though.
> + */
> +asmlinkage long sys_pipe(unsigned long __user *fildes)

Gaah. If you do this, at least clean it up and use "int *fildes", rather 
than copying the uglier old "unsigned long" ones that only exist because 
originally we had lots of odd int/long things that didn't matter on x86.

Yeah, yeah, the thing that matters is actually

> +	int fd[2];
>	...
> +		if (copy_to_user(fildes, fd, sizeof(fd)))

so it happens to work on all architectures anyway, but..

Also, we shouldn't need __ARCH_WANT_SYS_PIPE for this. Just make it 
unconditional, and then any architecture that wants somethign else can do 
their own "myarch_sys_pipe()" or whatever.

		Linus