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71cd3c6364
Currently, debugfs_create_blob() creates read-only debugfs binary blob files. In some cases, however, userspace tools need to write variable length data structures into predetermined memory addresses. An example is when injecting Vendor-defined error types through the einj module. In such cases, the functionality to write to these blob files in debugfs would be desired since the mapping aspect can be handled within the modules with userspace tools only needing to write into the blob files. Implement a write callback to enable writing to these blob files, created in debugfs, by owners only. Signed-off-by: Avadhut Naik <Avadhut.Naik@amd.com> Reviewed-by: Alexey Kardashevskiy <aik@amd.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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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.