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cded46d971("sched_ext: Make scx_bpf_dsq_insert*() return bool") introduced a new bool-returning scx_bpf_dsq_insert() and renamed the old void-returning version to scx_bpf_dsq_insert___compat, with the expectation that libbpf would match old binaries to the ___compat variant, maintaining backward binary compatibility. However, while libbpf ignores ___suffix on the BPF side when matching symbols, it doesn't do so for kernel-side symbols. Old binaries compiled with the original scx_bpf_dsq_insert() could no longer resolve the symbol. Fix by reversing the naming: Keep scx_bpf_dsq_insert() as the old void-returning interface and add ___v2 to the new bool-returning version. This allows old binaries to continue working while new code can use the ___v2 variant. Once libbpf is updated to ignore kernel-side ___SUFFIX, the ___v2 suffix can be dropped when the compat interface is removed. v2: Use ___v2 instead of ___new. Fixes:cded46d971("sched_ext: Make scx_bpf_dsq_insert*() return bool") Signed-off-by: Tejun Heo <tj@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 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.