Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 #ifndef _LINUX_CPUPRI_H
  2 #define _LINUX_CPUPRI_H
  3 
  4 #include <linux/sched.h>
  5 
  6 #define CPUPRI_NR_PRIORITIES    (MAX_RT_PRIO + 2)
  7 #define CPUPRI_NR_PRI_WORDS     BITS_TO_LONGS(CPUPRI_NR_PRIORITIES)
  8 
  9 #define CPUPRI_INVALID -1
 10 #define CPUPRI_IDLE     0
 11 #define CPUPRI_NORMAL   1
 12 /* values 2-101 are RT priorities 0-99 */
 13 
 14 struct cpupri_vec {
 15         spinlock_t lock;
 16         int        count;
 17         cpumask_var_t mask;
 18 };
 19 
 20 struct cpupri {
 21         struct cpupri_vec pri_to_cpu[CPUPRI_NR_PRIORITIES];
 22         long              pri_active[CPUPRI_NR_PRI_WORDS];
 23         int               cpu_to_pri[NR_CPUS];
 24 };
 25 
 26 #ifdef CONFIG_SMP
 27 int  cpupri_find(struct cpupri *cp,
 28                  struct task_struct *p, struct cpumask *lowest_mask);
 29 void cpupri_set(struct cpupri *cp, int cpu, int pri);
 30 int cpupri_init(struct cpupri *cp, bool bootmem);
 31 void cpupri_cleanup(struct cpupri *cp);
 32 #else
 33 #define cpupri_set(cp, cpu, pri) do { } while (0)
 34 #define cpupri_init() do { } while (0)
 35 #endif
 36 
 37 #endif /* _LINUX_CPUPRI_H */
 38 
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