Subj : [$] The phaseout of the mmap() file operation
To   : All
From : LWN.net
Date : Thu Sep 25 2025 18:00:10

[$] The phaseout of the mmap() file operation

Date:
Thu, 25 Sep 2025 16:48:55 +0000

Description:
The file_operations structure in the kernel is a set of function pointers 
implementing, as the
name would suggest, operations on files.  A subsystem that manages objects
which can be represented by a file descriptor will provide a file_operations 
structure providing implementations of the various
operations that a user of the file descriptor may want to carry out.  The 
mmap() method, in particular, is invoked when user space calls the mmap() 
system call to map the object behind a file descriptor into its address
space.  That method, though, is currently on its way out in a multi-release
process that started in 6.17.

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Link to news story:
https://lwn.net/Articles/1038715/


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