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Test multi_st_ops and demonstrate how different bpf programs can call a kfuncs that refers to the struct_ops instance in the same source file by id. The id is defined as a global vairable and initialized before attaching the skeleton. Kfuncs that take the id can hide the argument with a macro to make it almost transparent to bpf program developers. The test involves two struct_ops returning different values from .test_1. In syscall and tracing programs, check if the correct value is returned by a kfunc that calls .test_1. Signed-off-by: Amery Hung <ameryhung@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20250806162540.681679-4-ameryhung@gmail.com
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 reStructuredText 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.