0d82044e1b
A one-liner to make our Radix MMU support depend on HUGETLB_PAGE. We use some of the hugetlb inlines (eg. pud_huge()) when operating on the linear mapping and if they're compiled into empty wrappers we can corrupt memory. Then two fixes to our VFIO IOMMU code. The first is not a regression but fixes the locking to avoid a user-triggerable deadlock. The second does fix a regression since rc1, and depends on the first fix. It makes it possible to run guests with large amounts of memory again (~256GB). Thanks to: Alexey Kardashevskiy. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJcxUumAAoJEFHr6jzI4aWAEXwP/0x1hscWlJdpblLKc0Mh7kud MYUiEjxTsw2r8QeEJ5e3AtDh44DyuhrnL09w01vpsKMzVVC5vZDOQVXuAexeI8vO iv3pfpUhNyvNjpVDH1rHGJuQ4hJHIKr34GoNAhAfgW7yiZEvFOir2qd+bQm7KKgQ H2xvRiEXUJ3p1nVzOt2XYXEInTB2VWkwEfeNXLmh0AIySlAK1OLlrvZaZ4LzI7Bn Binbn+mIeftFWbXMOG8jhbiaTf6v9KQeWj5fTmaGEfBP3FBHjMQNf7krgCkq5Juh Ijxc20ardxBXeOq8E23q8+oAuGfpZjsKO3PPtl0r/Eyub65+FMP98//7iXvmwChL bkRwC+05LLMZPHYJ9UcWBKreEy1BDzb7nPWzvGkSyXnOVylavw+xZk22imAj/5pk auuuizTpTrW8c9WDYoWDkBVfbOOo44o4Eor51pYbC8Tq6cOkIYA6uO80JAD9yz6L FuKwrapMYKo779LAiX6u46iB6AVAaq/2TktwwnyZSqmj/oIiwNMKhrlENiO+CwgH PvDkrs0HA02F9nyHUreIQr5DQDgrgw4ZnMsatxvzBu/zBoe2RITfRms4c8WmKb+w y63ezFx4+FiFQGkniEY5/+o7ewpUFw6JyjKI+Q02tFKUKnq+iZQHtMxgJgxswxN/ k8EUzlyS2ZY8d7vHHQ4u =oJ9o -----END PGP SIGNATURE----- Merge tag 'powerpc-5.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "A one-liner to make our Radix MMU support depend on HUGETLB_PAGE. We use some of the hugetlb inlines (eg. pud_huge()) when operating on the linear mapping and if they're compiled into empty wrappers we can corrupt memory. Then two fixes to our VFIO IOMMU code. The first is not a regression but fixes the locking to avoid a user-triggerable deadlock. The second does fix a regression since rc1, and depends on the first fix. It makes it possible to run guests with large amounts of memory again (~256GB). Thanks to Alexey Kardashevskiy" * tag 'powerpc-5.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/mm_iommu: Allow pinning large regions powerpc/mm_iommu: Fix potential deadlock powerpc/mm/radix: Make Radix require HUGETLB_PAGE
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.