shmlock_user_lock 843 mm/mlock.c static DEFINE_SPINLOCK(shmlock_user_lock); shmlock_user_lock 855 mm/mlock.c spin_lock(&shmlock_user_lock); shmlock_user_lock 863 mm/mlock.c spin_unlock(&shmlock_user_lock); shmlock_user_lock 869 mm/mlock.c spin_lock(&shmlock_user_lock); shmlock_user_lock 871 mm/mlock.c spin_unlock(&shmlock_user_lock);