• Tejun Heo's avatar
    cgroup: replace cftype->write_string() with cftype->write() · 451af504
    Tejun Heo authored
    Convert all cftype->write_string() users to the new cftype->write()
    which maps directly to kernfs write operation and has full access to
    kernfs and cgroup contexts.  The conversions are mostly mechanical.
    
    * @css and @cft are accessed using of_css() and of_cft() accessors
      respectively instead of being specified as arguments.
    
    * Should return @nbytes on success instead of 0.
    
    * @buf is not trimmed automatically.  Trim if necessary.  Note that
      blkcg and netprio don't need this as the parsers already handle
      whitespaces.
    
    cftype->write_string() has no user left after the conversions and
    removed.
    
    While at it, remove unnecessary local variable @p in
    cgroup_subtree_control_write() and stale comment about
    CGROUP_LOCAL_BUFFER_SIZE in cgroup_freezer.c.
    
    This patch doesn't introduce any visible behavior changes.
    
    v2: netprio was missing from conversion.  Converted.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Acked-by: default avatarAristeu Rozanski <arozansk@redhat.com>
    Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
    Acked-by: default avatarLi Zefan <lizefan@huawei.com>
    Cc: Jens Axboe <axboe@kernel.dk>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: Michal Hocko <mhocko@suse.cz>
    Cc: Neil Horman <nhorman@tuxdriver.com>
    Cc: "David S. Miller" <davem@davemloft.net>
    451af504
cgroup.h 28.6 KB