s_sync_lock 2375 fs/fs-writeback.c mutex_lock(&sb->s_sync_lock); s_sync_lock 2447 fs/fs-writeback.c mutex_unlock(&sb->s_sync_lock); s_sync_lock 247 fs/super.c mutex_init(&s->s_sync_lock); s_sync_lock 1539 include/linux/fs.h struct mutex s_sync_lock; /* sync serialisation lock */