j_history_lock 1139 fs/jbd2/commit.c spin_lock(&journal->j_history_lock); j_history_lock 1151 fs/jbd2/commit.c spin_unlock(&journal->j_history_lock); j_history_lock 1051 fs/jbd2/journal.c spin_lock(&journal->j_history_lock); j_history_lock 1054 fs/jbd2/journal.c spin_unlock(&journal->j_history_lock); j_history_lock 1149 fs/jbd2/journal.c spin_lock_init(&journal->j_history_lock); j_history_lock 1116 include/linux/jbd2.h spinlock_t j_history_lock;