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3bb335c1e7
This avoids redundantly passing an (inout) head and tail pointer to gen7_append_oa_reports() from gen7_oa_read which doesn't need to reference either itself. Moving the head/tail reads and writes into gen7_append_oa_reports should have no functional effect except to avoid some redundant head pointer writes in cases where nothing was copied to userspace. This is a stepping stone towards updating how the head and tail pointer state is managed to improve the workaround for the OA unit's tail pointer race. It reduces the number of places we need to read/write the head and tail pointers. Signed-off-by: Robert Bragg <robert@sixbynine.org> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170511154345.962-5-lionel.g.landwerlin@intel.com Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> |
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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.