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SubjectRe: [PATCH tip/core/rcu 18/28] jbd2,rcu: Convert call_rcu(free_devcache) to kfree_rcu()
On Wed, Jun 08, 2011 at 09:34:31PM +0200, Jan Kara wrote:
> On Wed 08-06-11 12:29:57, Paul E. McKenney wrote:
> > From: Lai Jiangshan <laijs@cn.fujitsu.com>
> >
> > The rcu callback free_devcache() just calls a kfree(),
> > so we use kfree_rcu() instead of the call_rcu(free_devcache).
> >
> > Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
> > Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> > Cc: Andrew Morton <akpm@linux-foundation.org>
> > Cc: Jan Kara <jack@suse.cz>
> > Reviewed-by: Josh Triplett <josh@joshtriplett.org>
> Acked-by: Jan Kara <jack@suse.cz>

Thank you, Jan!

Thanx, Paul

> Honza
> > ---
> > fs/jbd2/journal.c | 7 +------
> > 1 files changed, 1 insertions(+), 6 deletions(-)
> >
> > diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
> > index e0ec3db..13fb464 100644
> > --- a/fs/jbd2/journal.c
> > +++ b/fs/jbd2/journal.c
> > @@ -2390,11 +2390,6 @@ struct devname_cache {
> > static struct devname_cache *devcache[1 << CACHE_SIZE_BITS];
> > static DEFINE_SPINLOCK(devname_cache_lock);
> >
> > -static void free_devcache(struct rcu_head *rcu)
> > -{
> > - kfree(rcu);
> > -}
> > -
> > const char *jbd2_dev_to_name(dev_t device)
> > {
> > int i = hash_32(device, CACHE_SIZE_BITS);
> > @@ -2423,7 +2418,7 @@ const char *jbd2_dev_to_name(dev_t device)
> > spin_unlock(&devname_cache_lock);
> > return ret;
> > }
> > - call_rcu(&devcache[i]->rcu, free_devcache);
> > + kfree_rcu(devcache[i], rcu);
> > }
> > devcache[i] = new_dev;
> > devcache[i]->device = device;
> > --
> > 1.7.3.2
> >
> --
> Jan Kara <jack@suse.cz>
> SUSE Labs, CR
> --
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