[Bug 958095]

[Jseward]

Committed, r12737.  Thanks for the patch.
I had to apply one of the hunks by hand -- I think it conflicted with
some other recent ioctl commits.  So it would be good if you could 
check over the commit to see it's OK.  Thanks.

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https://bugs.launchpad.net/bugs/958095

Title:
  Linux user input device ioctls missing wrappers

Status in Valgrind:
  Fix Released
Status in “valgrind” package in Ubuntu:
  Fix Released

Bug description:
  The user input device ioctls defined in linux/uinput.h need wrappers
  because they either don't provide a third argument or they provide an
  int value instead of a pointer to a memory location.

  This causes valgrind errors like:

  ==1178== Syscall param ioctl(generic) points to unaddressable byte(s)
  ==1178==    at 0x6AC8FB7: ioctl (syscall-template.S:82)
  ==1178==    by 0x4E33FA0: evemu_create (evemu.c:468)
  ==1178==    by 0x412698: utouch::evemu::Device::Device(char const*) (device.cpp:54)
  ==1178==    by 0x425DD0: AtomicTap_Recording_Test::TestBody() (atomic-timeout.cpp:170)
  ==1178==    by 0x46C2BC: void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) (in /home/cndougla/Canonical/x/upstream/utouch-gra
  il/tap-fixes/test/check-grail)
  ==1178==    by 0x463FE0: testing::Test::Run() (in /home/cndougla/Canonical/x/upstream/utouch-grail/tap-fixes/test/check-grail)
  ==1178==    by 0x4640C5: testing::TestInfo::Run() (in /home/cndougla/Canonical/x/upstream/utouch-grail/tap-fixes/test/check-grail)
  ==1178==    by 0x464206: testing::TestCase::Run() (in /home/cndougla/Canonical/x/upstream/utouch-grail/tap-fixes/test/check-grail)
  ==1178==    by 0x46455D: testing::internal::UnitTestImpl::RunAllTests() (in /home/cndougla/Canonical/x/upstream/utouch-grail/tap-fixes/test/check-grail)
  ==1178==    by 0x46BE3C: bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char cons
  t*) (in /home/cndougla/Canonical/x/upstream/utouch-grail/tap-fixes/test/check-grail)
  ==1178==    by 0x46363D: testing::UnitTest::Run() (in /home/cndougla/Canonical/x/upstream/utouch-grail/tap-fixes/test/check-grail)
  ==1178==    by 0x56740B4: main (main.cpp:123)
  ==1178==  Address 0x0 is not stack'd, malloc'd or (recently) free'd

  The default valgrind ioctl signatures do not match how the uinput
  ioctls work. These errors are false positives.

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