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3bc0f14940
When CONFIG_DW_EDMA=m, dw_edma_probe() is built as a module. Previously edma.h declared it as extern, but the implementation isn't available for builtin callers. A subsequent commit will add calls from dw_pcie_host_init() and dw_pcie_ep_init(), which can only be built-in. Make it safe for such builtin callers to call dw_edma_probe() by using IS_REACHABLE() to define a stub when CONFIG_DW_EDMA=m. When CONFIG_DW_EDMA=m, these builtin callers will fail to detect and register eDMA devices, so eDMA won't be usable even if the dw-edma module is loaded. [bhelgaas: split to separate patch, commit log] Link: https://lore.kernel.org/r/20230113171409.30470-25-Sergey.Semin@baikalelectronics.ru Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Vinod Koul <vkoul@kernel.org> |
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README |
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.