Revert "arch/arm/kernel/armksyms: fix merge derp"

This reverts commit f46ffcfe1ee8579f6fc6116472d995cdf5ba9086.
Revert "kernel: Move REPEAT_BYTE definition into linux/kernel.h"

This reverts commit b0b09033f99f3a636d847bc03b3fa34f845df856.
Revert "switch the protection of percpu_counter list to spinlock"

This reverts commit 775ef11dc0d2bac7ebd418e474f8d479d6353647.
Revert "word-at-a-time: make the interfaces truly generic"

This reverts commit bc83fb4db6e18cbe2c0b2f0cdd1f2873b4c842fd.
Revert "lib: Sparc's strncpy_from_user is generic enough, move under lib/"

This reverts commit 61dfb07aa1ee68194e5f1a9e0640f4b29ad05a61.