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With the latest llvm21 compiler, I hit several errors when building bpf
selftests. Some of errors look like below:
test_maps.c:565:40: error: variable 'val' is uninitialized when passed as a
const pointer argument here [-Werror,-Wuninitialized-const-pointer]
565 | assert(bpf_map_update_elem(fd, NULL, &val, 0) < 0 &&
| ^~~
prog_tests/bpf_iter.c:400:25: error: variable 'c' is uninitialized when passed
as a const pointer argument here [-Werror,-Wuninitialized-const-pointer]
400 | write(finish_pipe[1], &c, 1);
| ^
Some other errors have similar the pattern as the above.
These errors are fixed by initializing those variables properly.
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250715185910.3659447-1-yonghong.song@linux.dev
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.