Re: Use of mmap_sem in map_user_kiobuf

[Andrea Arcangeli <andrea@suse.de>]

On Fri, Jul 06, 2001 at 11:50:38AM +0100, Adrian Cox wrote:
> Does map_user_kiobuf really need to get a write lock on the mmap_sem? 
>  From examination of the code, all it can do is expand_stack(), fault in 
> pages, and increment the count on a page.
> 
> Is there anything I've missed? Would it be safe to use down_read(), 
> up_read() instead?

yes, it should be ok.

Andrea
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