s2                  9 kernel/proc.h    uint64 s2;
s2                 66 kernel/proc.h    /* 176 */ uint64 s2;
s2                 17 kernel/string.c   const uchar *s1, *s2;
s2                 20 kernel/string.c   s2 = v2;
s2                 22 kernel/string.c     if(*s1 != *s2)
s2                 23 kernel/string.c       return *s1 - *s2;
s2                 24 kernel/string.c     s1++, s2++;
s2                130 user/ulib.c    memcmp(const void *s1, const void *s2, uint n)
s2                132 user/ulib.c      const char *p1 = s1, *p2 = s2;