Nice explanation of why #GCC had to disable "gusa" soft atomics for pre-sh3 SuperH: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50457 …
@landley Same thing as kuser_helper page on arm - emulating atomics by restarting the instruction seq. if the kernel interrupts it.
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@landley It's a super-cheap (cheaper than hardware, even) way of doing atomics that works on any non-SMP architecture.Thanks. Twitter will use this to make your timeline better. UndoUndo
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