Enhancements for the kernel and LFS: 64-bit addressing mode and above-the bar stack storage

Description: Previously, the kernel and LFS ran in 31-bit addressing mode. In V2R2, the kernel and LFS run in 64-bit addressing mode, and the LFS also accommodates PFSes that run in 64-bit addressing mode. To alleviate storage constraints, above-the-bar stack storage for space-switched services that are used by the kernel and LFS is supported.

When change was introduced: z/OS® V2R2.