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Check for CAP_SYS_ADMIN before calling into the driver, similar to blkdev_flushbuf(). This is safer and can spare a check in the driver. (Currently BLKROSET is overridden by md and rbd, rbd is missing the check. md has the check, but it covers a lot more than BLKROSET.) Acked-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.