BITMAP_ORD_TO_POS(9)              Basic Kernel Library Functions             BITMAP_ORD_TO_POS(9)



NAME
       bitmap_ord_to_pos - find position of n-th set bit in bitmap

SYNOPSIS
       unsigned int bitmap_ord_to_pos(const unsigned long * buf, unsigned int ord,
                                      unsigned int nbits);

ARGUMENTS
       buf
           pointer to bitmap

       ord
           ordinal bit position (n-th set bit, n >= 0)

       nbits
           number of valid bit positions in buf

DESCRIPTION
       Map the ordinal offset of bit ord in buf to its position in buf. Value of ord should be in
       range 0 <= ord < weight(buf). If ord >= weight(buf), returns nbits.

       If for example, just bits 4 through 7 are set in buf, then ord values 0 through 3 will get
       mapped to 4 through 7, respectively, and all other ord values returns nbits. When ord
       value 3 gets mapped to (returns) pos value 7 in this example, that means that the 3rd set
       bit (starting with 0th) is at position 7 in buf.

       The bit positions 0 through nbits-1 are valid positions in buf.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      BITMAP_ORD_TO_POS(9)