1// Mutual exclusion lock.
2struct spinlock {
3 uint locked; // Is the lock held?
4
5 // For debugging:
6 char *name; // Name of lock.
7 struct cpu *cpu; // The cpu holding the lock.
8 uint pcs[10]; // The call stack (an array of program counters)
9 // that locked the lock.
10};
11
12