Revert "ARM: 7816/1: CONFIG_KUSER_HELPERS: fix help text"

This reverts commit 133552347a41773d12e237ebc886686aef21889a.
Revert "ARM: 7819/1: fiq: Cast the first argument of flush_icache_range()"

This reverts commit fa72642f428726ec0ba73abd6e8aa00a9733f2c6.
Revert "ARM: Fix FIQ code on VIVT CPUs"

This reverts commit 52cf02dc5d478302ba203160f3d0215331242b80.
Revert "ARM: Fix the world famous typo with is_gate_vma()"

This reverts commit 87f998351b665b3a6b267001032c5a9802027fc7.
Revert "ARM: fix nommu builds with 48be69a02 (ARM: move signal handlers into a vdso-like page)"

This reverts commit 839aa637683d15f1562f0eb40f390cd19ac5e6ff.
Revert "ARM: fix a cockup in 48be69a02 (ARM: move signal handlers into a vdso-like page)"

This reverts commit 75530f6fd31e6776353d9fadd485e17a6e9bbc07.
Revert "ARM: make vectors page inaccessible from userspace"

This reverts commit f048c05f8c901563643015b82d46855276675b26.
Revert "Revert "ARM: allow the kernel text section to be made read-only""

This reverts commit b36e45766ca3650cd1d901820a7c335de9becd2a.
Revert "ARM: move signal handlers into a vdso-like page"

This reverts commit 08cfc2f2ab8ec25ab359d5c575ab49fef4e41ee6.
Revert "ARM: allow kuser helpers to be removed from the vector page"

This reverts commit e2b001ef600b829a71561dd2547cd7636d8fd9e2.