Linux Kernel  3.7.1
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hweight.h
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1 #ifndef PERF_HWEIGHT_H
2 #define PERF_HWEIGHT_H
3 
4 #include <linux/types.h>
5 unsigned int hweight32(unsigned int w);
6 unsigned long hweight64(__u64 w);
7 
8 #endif /* PERF_HWEIGHT_H */