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SubjectRe: [Question] I doublt on spin_lock again.
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liyu wrote:

| 1. I know local_irq_save() in task_rq_lock(), but it only save
| FLAGS register to one unsigned long variable, but not disable
| maskable interrupt.

#define local_irq_save(x) __asm__ __volatile__("pushfl ; popl %0 ;
cli":"=g" (x): /* no
~ input */ :"memory")

- --
Zhang Le, Robert
Linux Engineer/Trainer

ThizLinux Laboratory Limited
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