Tetsuo Handa wrote:
9: void add_tail(FOO *next) {
10: static spinlock_t lock = SPIN_LOCK_UNLOCKED;
11: FOO *f = &first;
12: spin_lock(&lock);
You just declared a local spinlock on the stack and then lock and unlock it diligently - who is going to contend with you for that resource?
Jon.
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