2326ff8d5c
Andrii Nakryiko says: ==================== This patch set continues the work of revamping libbpf APIs that are not extensible, as they were added before we figured out all the intricacies of building APIs that can preserve ABI compatibility (both backward and forward). What makes them tricky is that (most of) these APIs are actively used by multiple applications, so we need to be careful about refactoring them. See individual patches for details, but the general approach is similar to previous bpf_prog_load() API revamp. The biggest different and complexity is in changing btf_dump__new(), because function overloading through macro magic doesn't work based on number of arguments, as both new and old APIs have 4 arguments. Because of that, another overloading approach is taken; overload happens based on argument types. I've validated manually (by using local test_progs-shared flavor that is compiling test_progs against libbpf as a shared library) that compiling "old application" (selftests before being adapted to using new variants of revamped APIs) are compiled and successfully run against newest libbpf version as well as the older libbpf version (provided no new variants are used). All these scenarios seem to be working as expected. v1->v2: - add explicit printf_fn NULL check in btf_dump__new() (Alexei); - replaced + with || in __builtin_choose_expr() (Alexei); - dropped test_progs-shared flavor (Alexei). ==================== Signed-off-by: Alexei Starovoitov <ast@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.