JFFS2 deadlock, kernel 3.4.11

[Thomas.Betker at rohde-schwarz.com]

Hello Joakim:

> I think your patch will work, but I don't like having 2 call sites
> to grab_cache_page_write_begin(mapping, index, flags) so I came
> up with this instead(untested as well):

The tests I ran this night were successful. I have adapted my patch 
according to your suggestions and started re-testing; I won't be able to 
finish today, though, so I will post the final patch on Monday (assuming 
that it works).

Have a nice weekend,
Thomas