Alexander Gordeev a6d77081e2 rcu: Limit rcu_state::levelcnt[] to RCU_NUM_LVLS items ... Variable rcu_num_lvls is limited by RCU_NUM_LVLS macro. In turn, rcu_state::levelcnt[] array is never accessed beyond rcu_num_lvls. Thus, rcu_state::levelcnt[] is safe to limit to RCU_NUM_LVLS items. Since rcu_num_lvls could be changed during boot (as result of rcutree.rcu_fanout_leaf kernel parameter update) one might assume a new value could overflow the value of RCU_NUM_LVLS. However, that is not the case, since leaf-level fanout is only permitted to increase, resulting in rcu_num_lvls possibly to decrease. Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>		2015-07-15 14:45:16 -07:00
..
Makefile	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
rcu.h	tiny_rcu: Directly force QS when call_rcu_[bh|sched]() on idle_task	2015-01-06 11:01:12 -08:00
rcutorture.c	rcutorture: Test SRCU cleanup code path	2015-05-27 12:59:58 -07:00
srcu.c	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00
tiny_plugin.h	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00
tiny.c	This patch series contains several clean ups and even a new trace clock	2015-06-26 14:02:43 -07:00
tree_plugin.h	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-06-22 18:57:44 -07:00
tree_trace.c	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00
tree.c	rcu: Simplify rcu_init_geometry() capacity arithmetics	2015-07-15 14:45:15 -07:00
tree.h	rcu: Limit rcu_state::levelcnt[] to RCU_NUM_LVLS items	2015-07-15 14:45:16 -07:00
update.c	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00