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Align struct file_operations with upstream v6.14 #311

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Aug 6, 2025
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Align struct file_operations with upstream v6.14 #311

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3 changes: 3 additions & 0 deletions lkmpg.tex
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Expand Up @@ -956,6 +956,9 @@ \subsection{The file\_operations Structure}
Some operations are not implemented by a driver.
For example, a driver that handles a video card will not need to read from a directory structure.
The corresponding entries in the \cpp|file_operations| structure should be set to \cpp|NULL|.
\footnote{
As of Linux kernel 6.12, several member fields have been added, removed, or had their prototypes changed. For example, additions include \texttt{fop\_flags}, \texttt{splice\_eof}, and \texttt{uring\_cmd}; removals include \texttt{iterate} and \texttt{sendpage}; and the prototype for \texttt{iopoll} was modified.
}

There is a gcc extension that makes assigning to this structure more convenient.
You will see it in modern drivers, and may catch you by surprise.
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