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x86 32-bit Changes Look To Be Ready For Linux 6.15 - Drops Support For More Than 4GB RAM

Over the past few months there's been an in-progress patch series by Arnd Bergmann for cleaning up the x86 32-bit kernel support for running on x86_64 CPUs

After the third iteration of the patches were posted this week, these x86 32-bit CPU clean-ups were shuffled into the tip/tip.git "x86/cpu" Git branch ahead of the upcoming Linux 6.15 merge window. - 4+ socket non-NUMA servers based on Intel 450GX/450NX, HP F8 and ServerWorks ServerSet/GrandChampion could theoretically still work with 8GB, but these were exceptionally rare even 20 years ago and would have usually been equipped with than the maximum amount of RAM. I still have one of those "rare" Xeon LV Sossaman systems albeit it's been at least a decade or more since I fired it up... Was fun back in the early days of Phoronix but not sad seeing this HIGHMEM64G / 32-bit PAE support retire.

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