On Wed, 8 Apr 2009, Jan Blunck wrote:
> This patch removes the stupid "Read locks within the self-held write lock
> succeed" behaviour. This is breaking in mm_take_all_locks() since it is quite
> common to ensure that a lock is taken with
> BUG_ON(down_read_trylock(&mm->mmap_sem)).
Good catch. There are some more oddballs in that file, which we missed
when we moved from 26 to 29 - we dropped the rwlocks stuff and that
cleaned up that area.
Thanks,
tglx
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