rcu: Fix RCU lockdep splat in set_task_cpu on fork path
rcu: Fix RCU lockdep splat in set_task_cpu on fork path

Add an RCU read-side critical section to suppress this false
positive.

Located-by: Eric Paris <b0b36e3cd9ea4e5739ff430a3056fabf2fdb0376@parisplace.org>
Signed-off-by: Peter Zijlstra <645ca7d3a8d3d4f60557176cd361ea8351edc32b@chello.nl>
Signed-off-by: Paul E. McKenney <1e0ce936bb9b355d257bf5790d2513c3f28be22b@linux.vnet.ibm.com>
Cc: 4c9eb49378914b743bdd32292c04df29b820d73e@cn.fujitsu.com
Cc: a6f1be4247cea11e3150b15872843079f20d7078@in.ibm.com
Cc: 007bef6a47fb57dff675bfa1b0b798b4bdfbfc25@polymtl.ca
Cc: c028c213ed5efcf30c3f4fc7361dbde0c893c5b7@joshtriplett.org
Cc: 6620bce6bfb8b2ba8b188f43804848d35a9a4d76@us.ibm.com
Cc: a103ef9226f51cd1e5e835b2f74c82dfb33d1ccb@us.ibm.com
Cc: 3fddac958924aef220f202ca567388ddab3f14a8@infradead.org
Cc: 43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org
Cc: 183bdd1d6873c97a167cc4b441324ddf7a94dd06@vt.edu
Cc: ebac1d06c1688626821bb0e574a037a7a5354e49@redhat.com
Cc: a0baddf32b28d2f9429941ed4af2fe636e210591@gmail.com
LKML-Reference: <1271880131-3951-1-git-send-email-1e0ce936bb9b355d257bf5790d2513c3f28be22b@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@elte.hu>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs