January 2026 (2026-01) monthly summary for SpinalHDL/SpinalHDL focusing on business value and technical excellence. Delivered build-system modernization and API-level improvements that enhance modularity, reusability, and maintainability, while providing practical guidance for using Mill. The work aligns with long-term maintainability, faster iteration, and safer extension of the codebase.

December 2025: Delivered build system modernization and maintenance, expanded test coverage, and fixed a critical bug in SInt exclusion checks. The changes unify dependency management, migrate to a unified build flow, broaden test coverage (including a switch component test), and fix an ArrayIndexOutOfBounds issue with negative literals, resulting in improved CI reliability, faster development cycles, and clearer versioning to 1.1.0.

2025-10 Monthly Summary for linux-riscv/linux: Key features delivered - MSI Interrupt Initialization Bug Fix for PCI Devices: Fixed incorrect startup of MSI interrupts caused by wrong callback invocation by overriding irq_startup and irq_shutdown in vmd_init_dev_msi_info to ensure correct IRQ initialization for affected PCI devices. Commit: e433110eb5bf067f74d3d15c5fb252206c66ae0b. Major bugs fixed - Resolved MSI IRQ initialization race/misconfiguration during PCI device startups by ensuring proper IRQ lifecycle hooks are invoked, improving PCI device reliability. Overall impact and accomplishments - Improved system stability and PCI device reliability on linux-riscv/linux. The fix reduces IRQ misconfiguration risks during boot and device initialization, contributing to smoother hardware bring-up and lower support burden for PCI devices on RISCV platforms. Technologies/skills demonstrated - Linux kernel development, PCI/MSI interrupt handling, kernel callback customization, and C-language kernel patching. Demonstrated ability to isolate, fix, and validate a critical interrupt initialization bug affecting PCI devices.

Concise monthly summary for 2025-09 highlighting key features delivered, major bugs fixed, overall impact, and technologies demonstrated for SpinalHDL/SpinalHDL.

August 2025 monthly summary for torvalds/linux focusing on stabilizing PCI MSI handling for devices requiring MSI_FLAG_PCI_MSI_MASK_PARENT. Delivered a targeted fix in the startup/shutdown code paths to ensure proper masking/unmasking of interrupts, reducing spurious interrupts and improving device reliability. Implemented in commit 727e914bbfbbda9e6efa5cb1abe4e96a949d576f with a check in cond_[startup|shutdown]_parent(). This work enhances kernel robustness for PCI MSI devices and demonstrates strong low-level debugging, testing, and patch verification. Business value includes fewer interrupt-related issues on critical hardware, smoother performance, and reduced maintenance burden.

July 2025 monthly summary focused on a critical Linux kernel/device-tree bug fix for CV180X SoCs in the geerlingguy/linux repository. Delivered a targeted patch to correct the MDIO multiplexer device-tree node name, resolving warnings about the MDIO bus number exceeding its maximum and ensuring proper device identification and configuration on RISC-V platforms.

March 2025: Focused on building reliability and correct integration for the RISC-V AIA path in tiiuae/nuttx. Delivered a targeted build-script correction that eliminates mislisted AIA sources and stabilizes artifact generation across CI runs.