Hi James,

On Wed, Aug 05, 2015 at 04:48:48PM +0100, James Hogan wrote:

These patches extend the test_user_copy test module to handle lots more
cases of user accessors which architectures can override separately, and
in particular those which are important for checking the MIPS Enhanced
Virtual Addressing (EVA) implementations, which need to handle
overlapping user and kernel address spaces, with special instructions
for accessing user address space from kernel mode.

- Checking that kernel pointers are accepted when user address limit is
  set to KERNEL_DS, as done by the kernel when it internally invokes
  system calls with kernel pointers.
- Checking of the unchecked accessors (which don't call access_ok()).
  Some of the tests are special cased for EVA at the moment which has
  stricter hardware guarantees for bad user accesses than other
  configurations.
- Checking of other sets of user accessors, including the inatomic user
  copies, copy_in_user, clear_user, the user string accessors, and the
  user checksum functions, all of which need special handling in arch
  code with EVA.

Tested on MIPS with and without EVA, and on x86_64.

The series causes several build failures with other architectures.

From next-20150806:

Build results:
	total: 152 pass: 138 fail: 14
Failed builds:
	alpha:allmodconfig (*)
	arm:allmodconfig (*)
	arm:omap2plus_defconfig
	arm64:allmodconfig
	i386:allyesconfig (*)
	i386:allmodconfig (*)
	m68k:defconfig (*)
	m68k:allmodconfig (*)
	m68k:sun3_defconfig (*)
	mips:allmodconfig
	parisc:allmodconfig
	s390:allmodconfig
	sparc32:allmodconfig (*)
	xtensa:allmodconfig (*)

The builds marked with (*) fail because of your patch series.

Guenter