Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some
[davej-history.git] / include / asm-parisc / smplock.h
blob1590fafe9e1cfea2f436566d70efd132e5756ccd
1 /*
2 * <asm/smplock.h>
4 * Default SMP lock implementation
5 */
6 #include <linux/interrupt.h>
7 #include <linux/spinlock.h>
9 extern spinlock_t kernel_flag;
12 * Release global kernel lock and global interrupt lock
14 #define release_kernel_lock(task, cpu) \
15 do { \
16 if (task->lock_depth >= 0) \
17 spin_unlock(&kernel_flag); \
18 release_irqlock(cpu); \
19 __sti(); \
20 } while (0)
23 * Re-acquire the kernel lock
25 #define reacquire_kernel_lock(task) \
26 do { \
27 if (task->lock_depth >= 0) \
28 spin_lock(&kernel_flag); \
29 } while (0)
33 * Getting the big kernel lock.
35 * This cannot happen asynchronously,
36 * so we only need to worry about other
37 * CPU's.
39 extern __inline__ void lock_kernel(void)
41 if (!++current->lock_depth)
42 spin_lock(&kernel_flag);
45 extern __inline__ void unlock_kernel(void)
47 if (--current->lock_depth < 0)
48 spin_unlock(&kernel_flag);