s_bal_lock       1492 fs/ext4/ext4.h 	spinlock_t s_bal_lock;
s_bal_lock        761 fs/ext4/mballoc.c 	spin_lock(&sbi->s_bal_lock);
s_bal_lock        764 fs/ext4/mballoc.c 	spin_unlock(&sbi->s_bal_lock);
s_bal_lock       2629 fs/ext4/mballoc.c 	spin_lock_init(&sbi->s_bal_lock);