Re: [PATCH] waitid system call

[Andi Kleen <ak@muc.de>]

Roland McGrath <roland@redhat.com> writes:

Are you sure you converted the new _rusage member properly 
in the 64->32bit siginfo converter? struct rusage uses long.

> +asmlinkage long sys32_waitid(int which, compat_pid_t pid,
> +			     siginfo_t32 __user *uinfo, int options)
> +{
> +	siginfo_t info;
> +	long ret;
> +	mm_segment_t old_fs = get_fs();
> +
> +	info.si_signo = 0;
> +	set_fs (KERNEL_DS);
> +	ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options);
> +	set_fs (old_fs);

Better use compat_alloc_user_space() for this. Otherwise it won't
work for UML/x86-64. Also that will make it easier to port to other
architectures. 

+	/* 1 if group stopped since last SIGCONT, -1 if SIGCONT since report */
+  	int			stop_state;

Can't this be merged into some other field? No need to waste memory
unnecessarily.

-Andi