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  • kernel/arch/amd64/include/cycle.h

    r7a0359b rdf4ed85  
    3636#define KERN_amd64_CYCLE_H_
    3737
    38 #include <trace.h>
    39 
    40 NO_TRACE static inline uint64_t get_cycle(void)
    41 {
    42         uint32_t lower;
    43         uint32_t upper;
    44        
    45         asm volatile (
    46                 "rdtsc\n"
    47                 : "=a" (lower),
    48                   "=d" (upper)
    49         );
    50        
    51         return ((uint64_t) lower) | (((uint64_t) upper) << 32);
    52 }
     38extern uint64_t get_cycle(void);
    5339
    5440#endif
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