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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-10-22 14:51:49 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-11-03 19:21:01 -0800
commit62db99f4783ea34531fc344bd8c539d5d186f24d (patch)
tree71b90af82e70ea33e05455bf1e6d93cec77ea79e /kernel/rcu/tiny.c
parent8fa7845df539105a8962c3173c866483da74ff6d (diff)
cpu: Avoid puts_pending overflow
A long string of get_online_cpus() with each followed by a put_online_cpu() that fails to acquire cpu_hotplug.lock can result in overflow of the cpu_hotplug.puts_pending counter. Although this is perhaps improbably, a system with absolutely no CPU-hotplug operations will have an arbitrarily long time in which this overflow could occur. This commit therefore adds overflow checks to get_online_cpus() and try_get_online_cpus(). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
Diffstat (limited to 'kernel/rcu/tiny.c')
0 files changed, 0 insertions, 0 deletions