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LWN.net

[$] Debugging information for inlined functions

BPF programs use BPF type format (BTF) debugging information in order to determine how to interact with functions in the kernel. Specifically, tracing a kernel function involves finding its address in the kernel's BTF section β€” but that doesn't work for functions that have been inlined, and therefore don't have a single, specific address. Alan Maguire wants to add information about inlined functions to BTF in order to allow them to be traced, and led a session on that topic at the 2026 Linux Storage, Filesystem, Memory-Management, and BPF Summit.

LWN.net

[$] Fedora approves a smaller GRUB

Leo Sandoval and Marta Lewandowska have put forward a change proposal for Fedora 45, which is expected in October, to provide a separate, slimmed-down version of GRUB for a niche use case. The new package would be in addition to the main GRUB package and would not replace it for the majority of Fedora users. The idea met with some resistance from Fedora contributors who thought that it would be better to use systemd-boot, or another modern bootloader, rather than trying to wrangle GRUB into a suitable state for the use case. The Fedora Engineering Steering Council (FESCo), however, voted to accept the change on July 7.

LWN.net

GCC steering committee announces AI policy

The GCC steering committee has announced that it has accepted an AI contributions policy recommended by the GCC AI policy working group. The policy, in part, states that the project will decline any "legally significant contributions which include LLM-generated content or are derived from LLM-generated content". It uses the definition of "legally significant" from the GNU Project maintainer guidelines, which holds that the threshold is "around 15 lines of code and/or text" to qualify as significant for copyright purposes. GCC maintainers may, however, choose to accept legally significant test cases that are generated by an LLM. The policy does not forbid use of LLMs for research, analysis, bug discovery and reporting, patch review, etc. as long as the output is not included in contributions. The committee says that it expects the policy will evolve and will be revisited periodically.

LWN.net

Security updates for Wednesday

Security updates have been issued by AlmaLinux (dovecot, go-fdo-client, go-fdo-server, kernel, kernel-rt, and sssd), Debian (calibre, hplip, libraw, and samba), Fedora (btrbk, chromium, gpsd, kronosnet, and restic), Mageia (gstreamer1.0-libav and libslirp), Slackware (libarchive, samba, and seamonkey), SUSE (agama-web-ui, chromium, gimp, glib2, GraphicsMagick, ignition, ImageMagick, java-21-openjdk, libssh, libssh-config, nginx, nmap, nsd, python-urllib3, python313-CherryPy, rsyslog, samba, sssd, valkey, webkit2gtk3, and yq), and Ubuntu (freerdp3, linux, linux-aws, linux-aws-5.4, linux-aws-fips, linux-azure, linux-azure-5.4, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-hwe-5.4, linux-iot, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp, linux-azure-fips, linux-ibm, linux-ibm-5.4, linux-kvm, and linux-raspi, linux-raspi-5.4).