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GCC warns about uninitialized local variables in cases where no initialization is needed, in particular in the overloads of the 'Capability::call()' function. Prior this patch, we dealt with those warnings by using an (unreliable) GCC pragma or by disabling the particular warning altogether (which is a bad idea). This patch removes the superfluous warnings by telling the compiler that the variable in question is volatile.
This is generic part of the Genode implementation. It consists of two parts: :_Core_: is the ultimate root of the Genode application tree and provides abstractions for the lowest-level hardware resources such as RAM, ROM, CPU, and generic device access. All generic parts of Core can be found here - for system-specific implementations refer to the appropriate 'base-<system>' directory. :_Base libraries and protocols_: that are used by each Genode component to interact with other components. This is the glue that holds everything together.