rcu: Stop rcu_do_batch() from multiplexing the "count" variable
authorPaul E. McKenney <paul.mckenney@linaro.org>
Fri, 22 Jun 2012 03:50:42 +0000 (20:50 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Mon, 25 Jun 2012 19:35:25 +0000 (12:35 -0700)
commitb41772abebc27c61dd578b76da99aa5240b4c99a
treecb26f8195bcda4aaf6bcbe5de782eec4cef52709
parent6b16351acbd415e66ba16bf7d473ece1574cf0bc
rcu: Stop rcu_do_batch() from multiplexing the "count" variable

Commit b1420f1c (Make rcu_barrier() less disruptive) rearranged the
code in rcu_do_batch(), moving the ->qlen manipulation to follow
the requeueing of the callbacks.  Unfortunately, this rearrangement
clobbered the value of the "count" local variable before the value
of rdp->qlen was adjusted, resulting in the value of rdp->qlen being
inaccurate.  This commit therefore introduces an index variable "i",
avoiding the inadvertent multiplexing.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
kernel/rcutree.c