Regarding the map variable in free_area_struct

[Jagadeesh Bhaskar P]

It is said in TLDP doc for the kernel that map variable is used as a
bitmask. If Nth block is free, correspondingly the Nth bit is set. How
is this implemented using the map variable? what I cant comprehend is
the significance of making map as:

"unsigned long* map"

Can someone help me in this regard!!

-- 
With regards,

Jagadeesh Bhaskar P

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