The Linux kernel community is advancing a structured plan to phase out support for several older ARM-based platforms, with full removal from the mainline source tree slated for early 2027. As reported by Phoronix, this move coincides with a parallel proposal to retire the aging x86 i486 architecture, reflecting a broader initiative to curtail maintenance burdens and enhance kernel efficiency.
A two-phase, two-year timeline aims to minimize disruption by providing ample warning. The first phase, set for the 2026.1 kernel release, will introduce compiler warnings to formally deprecate targeted hardware. Affected platforms include Marvell Dove and Kirkwood SoCs, Texas Instruments OMAP2 and OMAP3 series, and older XScale-based devices. Support for legacy instruction sets ARMv4T and ARMv5 is also slated for deprecation.
The rationale centers on natural lifecycle management rather than abrupt policy shifts. Maintaining platforms with declining active development strains resources—from code upkeep and build system time to potential security patching. Pruning these targets seeks to streamline the kernel, reduce its footprint, and limit attack surfaces.
This phased approach is deliberate, with deprecation warnings issued a full year before code removal to avert unexpected breakage. The grace period allows embedded distribution maintainers, firmware projects, and device developers to evaluate options, such as hardware migration or out-of-tree code forks.
The ARM platform retirement aligns with the concurrent i486 discontinuation, underscoring a cross-architecture commitment to regular legacy support reviews for codebase efficiency.
Community feedback indicates the final platform list may evolve before deprecation patches merge. Key open questions include quantifying downstream impact—specifically, how many commercial products or maintained distributions depend on these ARM platforms. Such data could refine support policies or the retirement scope.
For system integrators, embedded Linux developers, and IT professionals managing older industrial or networking hardware, the announcement signals an urgent need to assess project viability and plan transitions away from mainline kernel support in the coming years.
Linux核心社群正推動一項結構化計劃，逐步淘汰對多個舊式ARM平台的支持，並計劃於2027年初從主流源碼樹中完全移除。據Phoronix報導，此舉與另一項淘汰老舊x86 i486架構的提案同步進行，反映了一項旨在減輕維護負擔及提升核心效率的更廣泛倡議。
為盡量減少干擾，計劃採用為期兩年的兩階段時間表。第一階段將於2026.1核心版本推出，透過編譯器警告正式淘汰指定硬件。受影響的平台包括Marvell Dove及Kirkwood系統單晶片、德州儀器OMAP2和OMAP3系列，以及較舊的基於XScale的設備。同時亦計劃淘汰舊式指令集ARMv4T及ARMv5。
此舉的核心理念在於自然的生命週期管理，而非突兀的政策轉變。維護那些活躍開發日漸減少的平台，會消耗資源——從代碼維護、建構系統時間到潛在的安全補丁。精簡這些目標平台，旨在簡化核心、減少其佔用空間，並限制攻擊面。
這種分階段方法是經過深思熟慮的。系統會在代碼移除前整整一年發出淘汰警告，以防止意料之外的系統故障。這段緩衝期讓嵌入式發行版維護者、固件項目及設備開發者有時間評估選項，例如硬件遷移或樹外代碼分支。
這次ARM平台淘汰與同時進行的i486停用計劃一致，突顯了跨架構的承諾，即定期檢討舊式支持，以維護代碼庫效率。
社群反饋顯示，在淘汰補丁合併前，最終的平台名單可能仍會演變。關鍵的未決問題包括量化下游影響——具體而言，有多少商業產品或維護中的發行版依賴這些ARM平台。此類數據可能有助於完善支持政策或淘汰範圍。
對於系統整合商、嵌入式Linux開發者，以及管理舊式工業或網絡硬件的IT專業人員而言，此公告預示著他們需緊急評估項目可行性，並在未來數年內規劃逐步撤出對主流核心支持的過渡方案。