Hi All,
Can somebody explain the macro pmd_addr_end(addr, end)
#define pmd_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + PMD_SIZE) & PMD_MASK; \
(__boundary - 1 < (end) - 1)? __boundary: (end); \
})
I know that this macro rounds the addr value to next higher multiple
of PMD_SIZE. If this "ceiling" is greater than end, then the value is
end. What i dont understand is why is "boundary - 1 < end -1" used
instead of just boundary < end.
Thanks.
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