static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock) staticinlinevoiddo_raw_spin_lock_flags(raw_spinlock_t*lock, unsignedlong*flags) __acquires(lock) { __acquire(lock); arch_spin_lock_flags(&lock->raw_lock, *flags); } 上面raw_lock是: arch_spinlock_t raw_lock;...
typecheck(unsignedlong, flags); \ flags= _raw_spin_lock_irqsave(lock); \ }while(0) 1. 2. 3. 4. 5. static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock) staticinlinevoiddo_raw_spin_lock_flags(raw_spinlock_t*lock, unsignedlong*flags) __acquires(lock) { __a...
如果是在中断和普通线程之间同时访问共享对象,并且确信退出临界区后要打开中断,使用spin_lock_irq()/spin_unlock_irq(); 如果是在中断和普通线程之间同时访问共享对象,并且退出临界区后要保持中断的状态,使用spin_lock_irqsave()/spin_unlock_irqrestore(); 其实变种还不止这几个,还有read_lock_xxx/write_lock_xx...
Soft lockup occurred with logs: Raw [ 183.022629] nvme nvme1: rescanning namespaces. [39940.529629] watchdog: BUG: soft lockup - CPU#98 stuck for 24s! [swapper/98:0] [39940.529662] Modules linked in: dm_mod nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject...
spin_lock_irq(rq->queue_lock); while (!kthread_should_stop()) { struct request *req; struct mtd_blktrans_dev *dev; int res = 0; req = elv_next_request(rq); // 获取对列中第一个未完成的请求 if (!req) { // 如果请求为空将线程置于睡眠状态 ...
This patch configures the eTSEC to time stamps outgoing packets that have the skb_shared_tx->hardware flag set. The eTSEC is configured to write the time stamps back to memory after the frame is transmitted. During the clean_tx_ring operation these time stamps will be extracted and copied ...
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