../kernel/pid_namespace.c:207:26: warning: incorrect type in argument 1 (different address spaces)
../kernel/pid_namespace.c:207:26:    expected struct spinlock [usertype] *lock
../kernel/pid_namespace.c:207:26:    got struct spinlock [noderef] __rcu *
../kernel/pid_namespace.c:209:28: warning: incorrect type in argument 1 (different address spaces)
../kernel/pid_namespace.c:209:28:    expected struct spinlock [usertype] *lock
../kernel/pid_namespace.c:209:28:    got struct spinlock [noderef] __rcu *
../kernel/pid_namespace.c:208:28: warning: dereference of noderef expression
../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?
../kernel/pid_namespace.c:205:26: warning: incorrect type in argument 1 (different address spaces)
../kernel/pid_namespace.c:205:26:    expected struct spinlock [usertype] *lock
../kernel/pid_namespace.c:205:26:    got struct spinlock [noderef] __rcu *
../kernel/pid_namespace.c:207:28: warning: incorrect type in argument 1 (different address spaces)
../kernel/pid_namespace.c:207:28:    expected struct spinlock [usertype] *lock
../kernel/pid_namespace.c:207:28:    got struct spinlock [noderef] __rcu *
../kernel/pid_namespace.c:206:28: warning: dereference of noderef expression
../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?