Revert "arch/arm/kernel/return_address.c: fix warning"

This reverts commit fb367c31de27375442675e0ae738ffee45155cf8.
Revert "fix: compile error meminfo.c"

This reverts commit 57f7b4aaf951424dacd746fb87f12b0e41274f31.
arch/arm/kernel/return_address.c: fix warning
Revert "UKSM"

This reverts commit 64a00b7e7c6e97ed0642cdf083988880fb1dc114.
vm: Introduce UKSM for 3.4

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Conflicts:
	fs/proc/meminfo.c