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The 'pci-keystone.c' driver is the application/glue/wrapper driver for the Designware PCIe Controllers on TI SoCs. Now that all of the helper APIs that the 'pci-keystone.c' driver depends upon have been exported for use, enable support to build the driver as a loadable module. When building the driver as a module, the functions marked by the '__init' keyword may be invoked after the init memory has been freed by the kernel. This results will result in an exception of the form: Unable to handle kernel paging request at virtual address ... Mem abort info: ... pc : ks_pcie_host_init+0x0/0x540 lr : dw_pcie_host_init+0x170/0x498 ... ks_pcie_host_init+0x0/0x540 (P) ks_pcie_probe+0x728/0x84c platform_probe+0x5c/0x98 really_probe+0xbc/0x29c __driver_probe_device+0x78/0x12c driver_probe_device+0xd8/0x15c To address this, introduce a new function namely 'ks_pcie_init()' to register the 'fault handler' while removing the '__init' keyword from existing functions. Note that hook_fault_code() is defined as '__init' function. Since the init functions should never be called during runtime (after init memory freeing stage), the driver is made as a built-in if CONFIG_ARM (where hook_fault_code() is used) is selected. Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> [mani: added a note about hook_fault_code()] Signed-off-by: Manivannan Sadhasivam <mani@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://patch.msgid.link/20251029080547.1253757-5-s-vadapalli@ti.com |
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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 reStructuredText 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.