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The smp_read_barrier_depends() does nothing at all except on DEC Alpha, and no current DEC Alpha systems use Infiniband: lkml.kernel.org/r/20171023085921.jwbntptn6ictbnvj@tower This commit therefore makes Infiniband depend on !ALPHA and removes the now-ineffective invocations of smp_read_barrier_depends() from the InfiniBand driver. Please note that this patch should not be construed as my saying that InfiniBand's memory ordering is correct, but rather that this patch does not in any way affect InfiniBand's correctness. In other words, the result of applying this patch is bug-for-bug compatible with the original. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Doug Ledford <dledford@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Cree <mcree@orcon.net.nz> Cc: Andrea Parri <parri.andrea@gmail.com> Cc: <linux-rdma@vger.kernel.org> Cc: <linux-alpha@vger.kernel.org> [ paulmck: Removed drivers/dma/ioat/dma.c per Jason Gunthorpe's feedback. ] Acked-by: Jason Gunthorpe <jgg@mellanox.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.