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Commit9bbb9e5a33("param: use ops in struct kernel_param, rather than get and set fns directly") added the comment that module_param_call() was deprecated, during a large scale refactoring to bring sanity to type casting back then. In 2017 following more cleanups, it became useful again as it wraps a common pattern of creating an ops struct for a given get/set pair:b2f270e874("module: Prepare to convert all module_param_call() prototypes")ece1996a21("module: Do not paper over type mismatches in module_param_call()") static const struct kernel_param_ops __param_ops_##name = \ { .flags = 0, .set = _set, .get = _get }; \ __module_param_call(MODULE_PARAM_PREFIX, \ name, &__param_ops_##name, arg, perm, -1, 0) __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0) Many users of module_param_cb() appear to be almost universally open-coding the same thing that module_param_call() does now. Don't discourage[1] people from using module_param_call(): clarify the comment to show that module_param_cb() is useful if you repeatedly use the same pair of get/set functions. [1] https://lore.kernel.org/lkml/202308301546.5C789E5EC@keescook/ Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Johan Hovold <johan@kernel.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Nick Desaulniers <ndesaulniers@gooogle.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Joe Perches <joe@perches.com> Cc: linux-modules@vger.kernel.org Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.