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For the vast majority of mmio operations in this driver, explicit memory barriers aren't needed either because a data dependency between a read and write already exists, or because of the presence of the spin locks which execute a full memory barrier. Removing all the unneeded explicit barriers considerably reduces overhead for pinctrl operations, which in turn benefits things like i2c. Change-Id: I566e9189fa0d392f242395b43aefbb9f324c1900 Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com> Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.