1 #ifndef __LINUX_PREEMPT_H
2 #define __LINUX_PREEMPT_H
5 * include/linux/preempt.h - macros for accessing and manipulating
6 * preempt_count (used for kernel preemption, interrupt count, etc.)
9 #include <linux/config.h>
10 #include <linux/linkage.h>
14 #define preempt_count() (current_thread_info()->preempt_count)
16 #define inc_preempt_count() \
21 #define dec_preempt_count() \
28 asmlinkage void preempt_schedule(void);
30 #define preempt_disable() \
32 inc_preempt_count(); \
36 #define preempt_enable_no_resched() \
39 dec_preempt_count(); \
42 #define preempt_check_resched() \
44 if (unlikely(test_thread_flag(TIF_NEED_RESCHED))) \
48 #define preempt_enable() \
50 preempt_enable_no_resched(); \
51 preempt_check_resched(); \
56 #define preempt_disable() do { } while (0)
57 #define preempt_enable_no_resched() do { } while (0)
58 #define preempt_enable() do { } while (0)
59 #define preempt_check_resched() do { } while (0)
63 #else /* __KERNEL__ */
65 /* We need to disable much of the above in order to build iptables.
66 * Create unresolvable references so there are no surprises. */
67 asmlinkage void preempt_disable(void);
68 asmlinkage void preempt_enable(void);
69 asmlinkage int preempt_count(void);
71 #endif /* __KERNEL__ */
73 #endif /* __LINUX_PREEMPT_H */