On Tue, Feb 10, 2026 at 06:44:53AM +0000, Smita Koralahalli wrote: > From: Dan Williams <[email protected]> > > Ensure cxl_acpi has published CXL Window resources before HMEM walks Soft > Reserved ranges. > > Replace MODULE_SOFTDEP("pre: cxl_acpi") with an explicit, synchronous > request_module("cxl_acpi"). MODULE_SOFTDEP() only guarantees eventual > loading, it does not enforce that the dependency has finished init > before the current module runs. This can cause HMEM to start before > cxl_acpi has populated the resource tree, breaking detection of overlaps > between Soft Reserved and CXL Windows. > > Also, request cxl_pci before HMEM walks Soft Reserved ranges. Unlike > cxl_acpi, cxl_pci attach is asynchronous and creates dependent devices > that trigger further module loads. Asynchronous probe flushing > (wait_for_device_probe()) is added later in the series in a deferred > context before HMEM makes ownership decisions for Soft Reserved ranges. > > Add an additional explicit Kconfig ordering so that CXL_ACPI and CXL_PCI > must be initialized before DEV_DAX_HMEM. This prevents HMEM from consuming > Soft Reserved ranges before CXL drivers have had a chance to claim them.
Reviewed-by: Alison Schofield <[email protected]> snip
