linux-stable.git/arch, branch v3.6.3

kbuild: Fix accidental revert in commit fe04ddf

2012-10-21T16:32:42+00:00

commit 3ce9e53e788881da0d5f3912f80e0dd6b501f304 upstream.

Commit fe04ddf7c291 ("kbuild: Do not package /boot and /lib in make
tar-pkg") accidentally reverted two previous kbuild commits.  I don't
know what I was thinking.

This brings back changes made by commits 24cc7fb69a5b ("x86/kbuild:
archscripts depends on scripts_basic") and c1c1a59e37da ("firmware: fix
directory creation rule matching with make 3.80")

Reported-by: Jan Beulich 
Signed-off-by: Michal Marek 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

MIPS: ath79: Fix CPU/DDR frequency calculation for SRIF PLLs

2012-10-21T16:32:42+00:00

commit 97541ccfb9db2bb9cd1dde6344d5834438d14bda upstream.

Besides the CPU and DDR PLLs, the CPU and DDR frequencies
can be derived from other PLLs in the SRIF block on the
AR934x SoCs. The current code does not checks if the SRIF
PLLs are used and this can lead to incorrectly calculated
CPU/DDR frequencies.

Fix it by calculating the frequencies from SRIF PLLs if
those are used on a given board.

Signed-off-by: Gabor Juhos 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4324/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

xen/bootup: allow read_tscp call for Xen PV guests.

2012-10-21T16:32:40+00:00

commit cd0608e71e9757f4dae35bcfb4e88f4d1a03a8ab upstream.

The hypervisor will trap it. However without this patch,
we would crash as the .read_tscp is set to NULL. This patch
fixes it and sets it to the native_read_tscp call.

Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Greg Kroah-Hartman

xen/bootup: allow {read|write}_cr8 pvops call.

2012-10-21T16:32:40+00:00

commit 1a7bbda5b1ab0e02622761305a32dc38735b90b2 upstream.

We actually do not do anything about it. Just return a default
value of zero and if the kernel tries to write anything but 0
we BUG_ON.

This fixes the case when an user tries to suspend the machine
and it blows up in save_processor_state b/c 'read_cr8' is set
to NULL and we get:

kernel BUG at /home/konrad/ssd/linux/arch/x86/include/asm/paravirt.h:100!
invalid opcode: 0000 [#1] SMP
Pid: 2687, comm: init.late Tainted: G           O 3.6.0upstream-00002-gac264ac-dirty #4 Bochs Bochs
RIP: e030:[]  [] save_processor_state+0x212/0x270

.. snip..
Call Trace:
 [] do_suspend_lowlevel+0xf/0xac
 [] ? x86_acpi_suspend_lowlevel+0x10c/0x150
 [] acpi_suspend_enter+0x57/0xd5

Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Greg Kroah-Hartman

ARM: OMAP: counter: add locking to read_persistent_clock

2012-10-21T16:32:39+00:00

commit 9d7d6e363b06934221b81a859d509844c97380df upstream.

read_persistent_clock uses a global variable, use a spinlock to
ensure non-atomic updates to the variable don't overlap and cause
time to move backwards.

Signed-off-by: Colin Cross 
Signed-off-by: R Sricharan 
Signed-off-by: Tony Lindgren 
Signed-off-by: Greg Kroah-Hartman

ARM: 7541/1: Add ARM ERRATA 775420 workaround

2012-10-21T16:32:39+00:00

commit 7253b85cc62d6ff84143d96fe6cd54f73736f4d7 upstream.

arm: Add ARM ERRATA 775420 workaround

Workaround for the 775420 Cortex-A9 (r2p2, r2p6,r2p8,r2p10,r3p0) erratum.
In case a date cache maintenance operation aborts with MMU exception, it
might cause the processor to deadlock. This workaround puts DSB before
executing ISB if an abort may occur on cache maintenance.

Based on work by Kouei Abe and feedback from Catalin Marinas.

Signed-off-by: Kouei Abe 
[ horms@verge.net.au: Changed to implementation
  suggested by catalin.marinas@arm.com ]
Acked-by: Catalin Marinas 
Signed-off-by: Simon Horman 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

mips,kgdb: fix recursive page fault with CONFIG_KPROBES

2012-10-21T16:32:39+00:00

commit f0a996eeeda214f4293e234df33b29bec003b536 upstream.

This fault was detected using the kgdb test suite on boot and it
crashes recursively due to the fact that CONFIG_KPROBES on mips adds
an extra die notifier in the page fault handler.  The crash signature
looks like this:

kgdbts:RUN bad memory access test
KGDB: re-enter exception: ALL breakpoints killed
Call Trace:
[<807b7548>] dump_stack+0x20/0x54
[<807b7548>] dump_stack+0x20/0x54

The fix for now is to have kgdb return immediately if the fault type
is DIE_PAGE_FAULT and allow the kprobe code to decide what is supposed
to happen.

Signed-off-by: Jason Wessel 
Cc: Masami Hiramatsu 
Cc: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

ARM: vfp: fix saving d16-d31 vfp registers on v6+ kernels

2012-10-21T16:32:37+00:00

commit 846a136881b8f73c1f74250bf6acfaa309cab1f2 upstream.

Michael Olbrich reported that his test program fails when built with
-O2 -mcpu=cortex-a8 -mfpu=neon, and a kernel which supports v6 and v7
CPUs:

volatile int x = 2;
volatile int64_t y = 2;

int main() {
	volatile int a = 0;
	volatile int64_t b = 0;
	while (1) {
		a = (a + x) % (1 << 30);
		b = (b + y) % (1 << 30);
		assert(a == b);
	}
}

and two instances are run.  When built for just v7 CPUs, this program
works fine.  It uses the "vadd.i64 d19, d18, d16" VFP instruction.

It appears that we do not save the high-16 double VFP registers across
context switches when the kernel is built for v6 CPUs.  Fix that.

Tested-By: Michael Olbrich 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

efi: initialize efi.runtime_version to make query_variable_info/update_capsule workable

2012-10-12T20:50:32+00:00

commit d6cf86d8f23253225fe2a763d627ecf7dfee9dae upstream.

A value of efi.runtime_version is checked before calling
update_capsule()/query_variable_info() as follows.
But it isn't initialized anywhere.


static efi_status_t virt_efi_query_variable_info(u32 attr,
                                                 u64 *storage_space,
                                                 u64 *remaining_space,
                                                 u64 *max_variable_size)
{
        if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
                return EFI_UNSUPPORTED;


This patch initializes a value of efi.runtime_version at boot time.

Signed-off-by: Seiji Aguchi 
Acked-by: Matthew Garrett 
Signed-off-by: Matt Fleming 
Signed-off-by: Ivan Hu 
Signed-off-by: Greg Kroah-Hartman

efi: Build EFI stub with EFI-appropriate options

2012-10-12T20:50:32+00:00

commit 9dead5bbb825d7c25c0400e61de83075046322d0 upstream.

We can't assume the presence of the red zone while we're still in a boot
services environment, so we should build with -fno-red-zone to avoid
problems. Change the size of wchar at the same time to make string handling
simpler.

Signed-off-by: Matthew Garrett 
Signed-off-by: Matt Fleming 
Acked-by: Josh Boyer 
Signed-off-by: Greg Kroah-Hartman