ac_op 3293 fs/ext4/mballoc.c if (ac->ac_op == EXT4_MB_HISTORY_ALLOC) ac_op 4554 fs/ext4/mballoc.c ac->ac_op = EXT4_MB_HISTORY_PREALLOC; ac_op 4556 fs/ext4/mballoc.c ac->ac_op = EXT4_MB_HISTORY_ALLOC; ac_op 173 fs/ext4/mballoc.h __u8 ac_op; /* operation, for history only */