From: Paul E. McKenney Date: Tue, 10 Jan 2012 22:23:29 +0000 (-0800) Subject: rcu: Check for callback invocation from offline CPUs X-Git-Tag: v3.4-rc1~194^2^2~33 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8146c4e2e2c1972216afece5c50e072e86120e42;p=pandora-kernel.git rcu: Check for callback invocation from offline CPUs Because quiescent states are now reported from offline CPUs in CPU_DYING state, there is some possibility that such a CPU might note the end of a grace period and attempt to start invoking callbacks. This would be a very bad thing, and is supposed to be prevented by the fact that the CPU_DYING CPU gets rid of all its callbacks before reporting the quiescent state. However, there is other CPU-offline code in the kernel, and it is quite possible that someone will invoke RCU core processing from that code. Therefore, this commit adds a warning for this case. Signed-off-by: Paul E. McKenney Signed-off-by: Paul E. McKenney --- Reading git-diff-tree failed