Re: [RFC][v6][PATCH 0/9] clone_with_pids() syscall

[Arnd Bergmann <arnd@arndb.de>]

On Saturday 12 September 2009, Sukadev Bhattiprolu wrote:
> 
> Peter Zijlstra [peterz@infradead.org] wrote:
> | On Fri, 2009-09-11 at 09:47 -0700, Sukadev Bhattiprolu wrote:
> | > | Also, if you're passing a struct, why not put nr_pids in there, and
> | > | replace clone_pid_struct with a simple array? That would give us
> | > | 
> | > | struct clone_struct {
> | > |         u64 flags;
> | > |         u64 child_stack;
> | > |         u32 child_tid;
> | > |         u32 parent_tid;
> 
> BTW, these two tids are __user pointers that kernel copies data into.
> They should be u64 to avoid conversions in architecture specific code ?
> 

No, they are not pointers, the kernel can directly write into the user
data structure. Indirect pointers would not be helpful here IMHO.

	Arnd <><