On 2013/6/22 6:52, Tejun Heo wrote: > kernel/cgroup.c still has places where a RCU pointer is set and > accessed directly without going through RCU_INIT_POINTER() or > rcu_dereference_protected(). They're all properly protected accesses > so nothing is broken but it leads to spurious sparse RCU address space > warnings. > > Substitute direct accesses with RCU_INIT_POINTER() and > rcu_dereference_protected(). Note that %true is specified as the > extra condition for all derference updates. This isn't ideal as all > it does is suppressing warning without actually policing > synchronization rules; however, most are scheduled to be removed > pretty soon along with css_id itself, so no reason to be more > elaborate. > > Combined with the previous changes, this removes all RCU related > sparse warnings from cgroup. > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> > Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx> > --- > kernel/cgroup.c | 21 ++++++++++++--------- > 1 file changed, 12 insertions(+), 9 deletions(-) > Acked-by; Li Zefan <lizefan@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
