[RFC PATCH for 4.15 0/9] membarrier updates for 4.15

Those are the membarrier changes I plan to submit for 4.15. This series includes selftests improvements for sys_membarrier, improvement of powerpc handling of the memory barrier required by sys_membarrier in switch_mm(), and adds a new core serializing membarrier, currently only implemented on

[RFC PATCH for 4.15 0/9] membarrier updates for 4.15

Those are the membarrier changes I plan to submit for 4.15. This series includes selftests improvements for sys_membarrier, improvement of powerpc handling of the memory barrier required by sys_membarrier in switch_mm(), and adds a new core serializing membarrier, currently only implemented on