1IDR_ALLOC_CYCLIC(9)     Basic Kernel Library Functions     IDR_ALLOC_CYCLIC(9)
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NAME

6       idr_alloc_cyclic - allocate new idr entry in a cyclical fashion
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SYNOPSIS

9       int idr_alloc_cyclic(struct idr * idr, void * ptr, int start, int end,
10                            gfp_t gfp_mask);
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ARGUMENTS

13       idr
14           the (initialized) idr
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16       ptr
17           pointer to be associated with the new id
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19       start
20           the minimum id (inclusive)
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22       end
23           the maximum id (exclusive, <= 0 for max)
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25       gfp_mask
26           memory allocation flags
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DESCRIPTION

29       Essentially the same as idr_alloc, but prefers to allocate
30       progressively higher ids if it can. If the “cur” counter wraps, then it
31       will start again at the “start” end of the range and allocate one that
32       has already been used.
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35Kernel Hackers Manual 3.10         June 2019               IDR_ALLOC_CYCLIC(9)
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