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    Subject[PATCH 3.14 35/44] new helper: dentry_free()
    Date
    3.14-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Al Viro <viro@zeniv.linux.org.uk>

    commit b4f0354e968f5fabd39bc85b99fedae4a97589fe upstream.

    The part of old d_free() that dealt with actual freeing of dentry.
    Taken out of dentry_kill() into a separate function.

    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
    Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    fs/dcache.c | 15 ++++++++++-----
    1 file changed, 10 insertions(+), 5 deletions(-)

    --- a/fs/dcache.c
    +++ b/fs/dcache.c
    @@ -244,6 +244,15 @@ static void __d_free(struct rcu_head *he
    kmem_cache_free(dentry_cache, dentry);
    }

    +static void dentry_free(struct dentry *dentry)
    +{
    + /* if dentry was never visible to RCU, immediate free is OK */
    + if (!(dentry->d_flags & DCACHE_RCUACCESS))
    + __d_free(&dentry->d_u.d_rcu);
    + else
    + call_rcu(&dentry->d_u.d_rcu, __d_free);
    +}
    +
    /**
    * dentry_rcuwalk_barrier - invalidate in-progress rcu-walk lookups
    * @dentry: the target dentry
    @@ -511,11 +520,7 @@ relock:
    if (dentry->d_op && dentry->d_op->d_release)
    dentry->d_op->d_release(dentry);

    - /* if dentry was never visible to RCU, immediate free is OK */
    - if (!(dentry->d_flags & DCACHE_RCUACCESS))
    - __d_free(&dentry->d_u.d_rcu);
    - else
    - call_rcu(&dentry->d_u.d_rcu, __d_free);
    + dentry_free(dentry);
    return parent;
    }




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