Merge tag 'docs-4.10' of git://git.lwn.net/linux

Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -> awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" => "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...

1 files changed, 59 insertions, 0 deletions

diff --git a/Documentation/admin-guide/tainted-kernels.rst b/Documentation/admin-guide/tainted-kernels.rst
new file mode 100644
index 000000000000..1df03b5cb02f
--- /dev/null
+++ b/Documentation/admin-guide/tainted-kernels.rst
@@ -0,0 +1,59 @@
+Tainted kernels
+---------------
+
+Some oops reports contain the string **'Tainted: '** after the program
+counter. This indicates that the kernel has been tainted by some
+mechanism.  The string is followed by a series of position-sensitive
+characters, each representing a particular tainted value.
+
+  1) 'G' if all modules loaded have a GPL or compatible license, 'P' if
+     any proprietary module has been loaded.  Modules without a
+     MODULE_LICENSE or with a MODULE_LICENSE that is not recognised by
+     insmod as GPL compatible are assumed to be proprietary.
+
+  2) ``F`` if any module was force loaded by ``insmod -f``, ``' '`` if all
+     modules were loaded normally.
+
+  3) ``S`` if the oops occurred on an SMP kernel running on hardware that
+     hasn't been certified as safe to run multiprocessor.
+     Currently this occurs only on various Athlons that are not
+     SMP capable.
+
+  4) ``R`` if a module was force unloaded by ``rmmod -f``, ``' '`` if all
+     modules were unloaded normally.
+
+  5) ``M`` if any processor has reported a Machine Check Exception,
+     ``' '`` if no Machine Check Exceptions have occurred.
+
+  6) ``B`` if a page-release function has found a bad page reference or
+     some unexpected page flags.
+
+  7) ``U`` if a user or user application specifically requested that the
+     Tainted flag be set, ``' '`` otherwise.
+
+  8) ``D`` if the kernel has died recently, i.e. there was an OOPS or BUG.
+
+  9) ``A`` if the ACPI table has been overridden.
+
+ 10) ``W`` if a warning has previously been issued by the kernel.
+     (Though some warnings may set more specific taint flags.)
+
+ 11) ``C`` if a staging driver has been loaded.
+
+ 12) ``I`` if the kernel is working around a severe bug in the platform
+     firmware (BIOS or similar).
+
+ 13) ``O`` if an externally-built ("out-of-tree") module has been loaded.
+
+ 14) ``E`` if an unsigned module has been loaded in a kernel supporting
+     module signature.
+
+ 15) ``L`` if a soft lockup has previously occurred on the system.
+
+ 16) ``K`` if the kernel has been live patched.
+
+The primary reason for the **'Tainted: '** string is to tell kernel
+debuggers if this is a clean kernel or if anything unusual has
+occurred.  Tainting is permanent: even if an offending module is
+unloaded, the tainted value remains to indicate that the kernel is not
+trustworthy.