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kernel
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linux
XArray: Add xa_limit_16b
A 16-bit limit is a more common limit than I had realised. Make it
generally available.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
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include/linux/xarray.h
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include/linux/xarray.h
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*
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* This structure is used either directly or via the XA_LIMIT() macro
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* to communicate the range of IDs that are valid for allocation.
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* Two common ranges are predefined for you:
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* Three common ranges are predefined for you:
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* * xa_limit_32b - [0 - UINT_MAX]
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* * xa_limit_31b - [0 - INT_MAX]
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* * xa_limit_16b - [0 - USHRT_MAX]
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*/
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struct xa_limit {
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u32 max;
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#define xa_limit_32b XA_LIMIT(0, UINT_MAX)
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#define xa_limit_31b XA_LIMIT(0, INT_MAX)
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#define xa_limit_16b XA_LIMIT(0, USHRT_MAX)
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typedef unsigned __bitwise xa_mark_t;
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#define XA_MARK_0 ((__force xa_mark_t)0U)