b7b4e78552
Sparse warns that the incorrect type is being assigned to the CPUFREQ driver_data variable in the Tegra186 CPUFREQ driver. The Tegra186 CPUFREQ driver is assigned a type of 'void __iomem *' to a pointer of type 'void *' ... drivers/cpufreq/tegra186-cpufreq.c:72:37: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *driver_data @@ got void [noderef] __iomem * @@ ... drivers/cpufreq/tegra186-cpufreq.c:87:40: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] __iomem *edvd_reg @@ got void *driver_data @@ The Tegra186 CPUFREQ driver is using the policy->driver_data variable to store and iomem pointer to a Tegra186 CPU register that is used to set the clock speed for the CPU. This is not necessary because the register base address is already stored in the driver data and the offset of the register for each CPU is static. Therefore, fix this by adding a new structure with the register offsets for each CPU and store this in the main driver data structure along with the register base address. Please note that a new structure has been added for storing the register offsets rather than a simple array, because this will permit further clean-ups and simplification of the driver. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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.