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XArray: Change xa_insert to return -EBUSY

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Userspace translates EEXIST to "File exists" which isn't a very good
error message for the problem.  "Device or resource busy" is a better
indication of what went wrong.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2019-02-06 13:07:11 -05:00
parent 809ab9371c
commit fd9dc93e36
5 changed files with 9 additions and 9 deletions
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Documentation/core-api/xarray.rst
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@ -85,7 +85,7 @@ which was at that index; if it returns the same entry which was passed as
If you want to only store a new entry to an index if the current entry
at that index is ``NULL``, you can use :c:func:`xa_insert` which
returns ``-EEXIST`` if the entry is not empty.
returns ``-EBUSY`` if the entry is not empty.
You can enquire whether a mark is set on an entry by using
:c:func:`xa_get_mark`. If the entry is not ``NULL``, you can set a mark