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2f96028708
udmabuf has the following implicit declaration warns:
udmabuf.c:30:10: warning: implicit declaration of function 'open';
udmabuf.c:42:8: warning: implicit declaration of function 'fcntl'
These are caused due to not including fcntl.h and including just
linux/fcntl.h. Fix it to include fcntl.h which will bring in the
linux/fcntl.h. In addition, define __EXPORTED_HEADERS__ to bring in
F_ADD_SEALS and F_SEAL_SHRINK defines and fix the following error
that show up when just fcntl.h is included.
udmabuf.c:45:21: error: 'F_ADD_SEALS' undeclared
45 | ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
| ^~~~~~~~~~~
udmabuf.c:45:34: error: 'F_SEAL_SHRINK' undeclared
45 | ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
| ^~~~~~~~~~~~~
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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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.