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0bd39455b1
iio_dev->mlock is to be used only by the IIO core for protecting device mode changes between INDIO_DIRECT and INDIO_BUFFER. This patch replaces the use of mlock with the already established buf_lock mutex. Introducing 'unlocked' forms of read and write registers. The read/write frequency functions now require buf_lock to be held. That's not obvious so avoid this but moving the locking inside the functions where it is then clear that they are taking the unlocked forms of the register read/write. It isn't readily apparent that write frequency function requires the locks to be taken, so move it inside the function to where it is required to protect. Also, the read raw does not require iio_dev->mlock for reads. It can run concurrently as resource protection is handled by buf_lock in read register. Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> |
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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.