tree 5788b2b43ca6e0a9fb7a5ece6dcd197bd8319990
parent b93e21a51e1c8ed3816da888d34f88193ad1b917
author Paul E. McKenney <paulmck@kernel.org> 1593631802 -0700
committer Paul E. McKenney <paulmck@kernel.org> 1598319514 -0700

scftorture: Add smp_call_function_many() memory-ordering checks

This commit adds checks for memory misordering across calls to and
returns from smp_call_function_many() in the case where the caller waits.
Misordering results in a splat.

Note that in contrast to smp_call_function_single(), this code does not
test memory ordering into the handler in the no-wait case because none
of the handlers would be able to free the scf_check structure without
introducing heavy synchronization to work out which was last.

[ paulmck: s/GFP_KERNEL/GFP_ATOMIC/ per kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>