linux-toradex.git/arch, branch v3.14.3

ARM: dts: am335x: update USB DT references

2014-05-06T14:59:38+00:00

commit a2f8d6b303213a98436455aece7e14cdd1240629 upstream.

In "ARM: dts: am33xx: correcting dt node unit address for usb", the
usb_ctrl_mod and cppi41dma nodes were updated with the correct register
addresses.  However, the dts files that reference these nodes were not
updated, and those devices are no longer being enabled.

This patch corrects the references for the affected dts files.

Signed-off-by: Leigh Brown 
Signed-off-by: Tony Lindgren 
Cc: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

ARM: tegra: remove UART5/UARTE from tegra124.dtsi

2014-05-06T14:59:37+00:00

commit 862f0eea38409ff0d7f226c1245b787e3f0e2607 upstream.

Tegra124 only has 4 UARTs. Parts of the documentation hint at a fifth
UART, but this appears to be left-over from earlier SoC documentation.
Remove the non-existent DT node for UART5.

Signed-off-by: Stephen Warren 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

sh: fix format string bug in stack tracer

2014-05-06T14:59:34+00:00

commit a0c32761e73c9999cbf592b702f284221fea8040 upstream.

Kees reported the following error:

   arch/sh/kernel/dumpstack.c: In function 'print_trace_address':
   arch/sh/kernel/dumpstack.c:118:2: error: format not a string literal and no format arguments [-Werror=format-security]

Use the "%s" format so that it's impossible to interpret 'data' as a
format string.

Signed-off-by: Matt Fleming 
Reported-by: Kees Cook 
Acked-by: Kees Cook 
Cc: Paul Mundt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

arm64: __NR_compat_syscalls fix

2014-05-06T14:59:29+00:00

commit 838977f0178334bf3d7f3e974ea3154b68979be0 upstream.

This fixes commit 6290b53de025 (arm64: compat: Wire up new AArch32 syscalls)
which did not update __NR_compat_syscalls accordingly.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Catalin Marinas 
Signed-off-by: Greg Kroah-Hartman

x86/efi: Correct EFI boot stub use of code32_start

2014-05-06T14:59:29+00:00

commit 7e8213c1f3acc064aef37813a39f13cbfe7c3ce7 upstream.

code32_start should point at the start of the protected mode code, and
*not* at the beginning of the bzImage. This is much easier to do in
assembly so document that callers of make_boot_params() need to fill out
code32_start.

The fallout from this bug is that we would end up relocating the image
but copying the image at some offset, resulting in what appeared to be
memory corruption.

Reported-by: Thomas Bächler 
Signed-off-by: Matt Fleming 
Signed-off-by: Greg Kroah-Hartman

x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels

2014-05-06T14:59:26+00:00

commit b3b42ac2cbae1f3cecbb6229964a4d48af31d382 upstream.

The IRET instruction, when returning to a 16-bit segment, only
restores the bottom 16 bits of the user space stack pointer.  We have
a software workaround for that ("espfix") for the 32-bit kernel, but
it relies on a nonzero stack segment base which is not available in
32-bit mode.

Since 16-bit support is somewhat crippled anyway on a 64-bit kernel
(no V86 mode), and most (if not quite all) 64-bit processors support
virtualization for the users who really need it, simply reject
attempts at creating a 16-bit segment when running on top of a 64-bit
kernel.

Cc: Linus Torvalds 
Signed-off-by: H. Peter Anvin 
Link: http://lkml.kernel.org/n/tip-kicdm89kzw9lldryb1br9od0@git.kernel.org
Signed-off-by: Greg Kroah-Hartman

ftrace/x86: One more missing sync after fixup of function modification failure

2014-05-06T14:59:26+00:00

commit 12729f14d8357fb845d75155228b21e76360272d upstream.

If a failure occurs while modifying ftrace function, it bails out and will
remove the tracepoints to be back to what the code originally was.

There is missing the final sync run across the CPUs after the fix up is done
and before the ftrace int3 handler flag is reset.

Here's the description of the problem:

	CPU0				CPU1
	----				----
  remove_breakpoint();
  modifying_ftrace_code = 0;

				[still sees breakpoint]
				
				[sees modifying_ftrace_code as zero]
				[no breakpoint handler]
				[goto failed case]
				[trap exception - kernel breakpoint, no
				 handler]
				BUG()

Link: http://lkml.kernel.org/r/1393258342-29978-2-git-send-email-pmladek@suse.cz

Fixes: 8a4d0a687a5 "ftrace: Use breakpoint method to update ftrace caller"
Acked-by: Frederic Weisbecker 
Acked-by: H. Peter Anvin 
Signed-off-by: Petr Mladek 
Signed-off-by: Steven Rostedt 
Signed-off-by: Greg Kroah-Hartman

x86, AVX-512: Enable AVX-512 States Context Switch

2014-05-06T14:59:26+00:00

commit c2bc11f10a39527cd1bb252097b5525664560956 upstream.

This patch enables Opmask, ZMM_Hi256, and Hi16_ZMM AVX-512 states for
xstate context switch.

Signed-off-by: Fenghua Yu 
Link: http://lkml.kernel.org/r/1392931491-33237-2-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin 
Signed-off-by: Greg Kroah-Hartman

x86, AVX-512: AVX-512 Feature Detection

2014-05-06T14:59:26+00:00

commit 8e5780fdeef7dc490b3f0b3a62704593721fa4f3 upstream.

AVX-512 is an extention of AVX2. Its spec can be found at:
http://download-software.intel.com/sites/default/files/managed/71/2e/319433-017.pdf

This patch detects AVX-512 features by CPUID.

Signed-off-by: Fenghua Yu 
Link: http://lkml.kernel.org/r/1392931491-33237-1-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin 
Signed-off-by: Greg Kroah-Hartman

x86, hash: Fix build failure with older binutils

2014-05-06T14:59:26+00:00

commit 06325190bd577e11429444d54f454b9d13f560c9 upstream.

Just like for other ISA extension instruction uses we should check
whether the assembler actually supports them. The fallback here simply
is to encode an instruction  with fixed operands (%eax and %ecx).

[ hpa: tagging for -stable as a build fix ]

Signed-off-by: Jan Beulich 
Link: http://lkml.kernel.org/r/530F0996020000780011FBE7@nat28.tlf.novell.com
Cc: Francesco Fusco 
Cc: Thomas Graf 
Cc: David S. Miller 
Acked-by: Daniel Borkmann 
Signed-off-by: H. Peter Anvin 
Signed-off-by: Greg Kroah-Hartman