s1                  8 kernel/proc.h    uint64 s1;
s1                 57 kernel/proc.h    /* 104 */ uint64 s1;
s1                 17 kernel/string.c   const uchar *s1, *s2;
s1                 19 kernel/string.c   s1 = v1;
s1                 22 kernel/string.c     if(*s1 != *s2)
s1                 23 kernel/string.c       return *s1 - *s2;
s1                 24 kernel/string.c     s1++, s2++;
s1                130 user/ulib.c    memcmp(const void *s1, const void *s2, uint n)
s1                132 user/ulib.c      const char *p1 = s1, *p2 = s2;