idr: Remove idr_alloc_ext

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It has no more users, so remove it.  Move idr_alloc() back into idr.c,
move the guts of idr_alloc_cmn() into idr_alloc_u32(), remove the
wrappers around idr_get_free_cmn() and rename it to idr_get_free().
While there is now no interface to allocate IDs larger than a u32,
the IDR internals remain ready to handle a larger ID should a need arise.

These changes make it possible to provide the guarantee that, if the
nextid pointer points into the object, the object's ID will be initialised
before a concurrent lookup can find the object.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

...

This commit is contained in:

Matthew Wilcox 2017-11-28 15:16:24 -05:00

parent f730cb93db

commit 460488c58c

5 changed files with 105 additions and 111 deletions

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51

include/linux/idr.h

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17

include/linux/radix-tree.h

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